Engine does not crank (bad block ground) - Cadillac
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- Опубликовано: 21 окт 2024
- Some other good starting system testing videos:
• How to test a starter ...
• How to troubleshoot a ...
• Engine does not crank ...
• No Crank Troubleshooti...
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Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.
7 years later and your helping me out. Really appreciate It thanks for the tips.
Myself as well... almost 8 months later
The little bonus-takes at the end shows that it's hard work and that you set high standards for your content! And it shows your human side! Nice going Paul!
You, dear Sir, are a Godsend!! Your video saved me potentially hundreds of hours of banging my head against a wall trying to chase down the crazy symptoms I was having with my caddy (exactly the same symptoms You were describing). Thank You soooo much for sharing Your wisdom and hard work!! I would have NEVER thought to look at the (completely obscured by other things) block grounding cable. Mine was completely severed right at the crimped eyelet that mounts to the block. Thank You again for Your incredibly helpful video!!!!
Happy to have found your video!! I thought I was going mad when I started tracking down what I believed was a bad starter issue/harness issue. 2 starters later, lights and everything going haywire, I finally decided to take a step back and check on the symptoms of a bad ground. I gotta say this was a very detailed video and I like how there was a step by step process fully explained on how to diagnose it. Thank you for the video and I'll be back for more soon!👍
awesome! Glad this helped you!
I'm going through this now... about to go outside and work on a DTS... driving me crazy... Thank you so much... you may have saved my day..🙏🏼🙏🏼🙏🏼
Hi, Paul. I've got about 30 years as a diagnostic tech. I hate to seem like a tool salesman, but, Power Probe 3 is a huge time saver. it is a dvom with really long leads. Direct battery hookup can tell you what the battery voltage is and voltage drop on both power and ground sides.
I quickly diagnose all makes for a no crank problem. You check 3 things at the starter. Voltage at the + terminal, voltage at the crank signal wire and voltage at the case ground. All while cranking. Loading the circuit is key as you stated.
I'm not trying to brag but your Cadillac would have been diagnosed within 2 minutes or so. I learned this the hard way though the years. Now I teach this to all new techs. The Power Probe 3 is a great tool. Yes you can do it with a dvom and test light and long jumper wires. But the Power Probe 3 is all those in one.
I tried and quickly returned the Power Probe Hook. Don't waste your time and money on that one. The Power Probe 3 will quickly pay for itself if you make money fixing cars and learn to use the tool.
I love your videos and your teaching methods. You're doing great work for future and current techs including myself.
Big thanks from Marina Del Rey, California.
After watching a ridiculous amount of this dudes video's, I was trying to test my speinter starter motor for a no crank under the advise that it was that from a garage doing its yearly test, and i noticed the earth strap was black. Sobturning my attention to it, I moved it about and then went to try again and the thing cranked. Mr Scannerdanner you rock. Im an avid fan. Keep the vids coming, i'm hooked.
Thanks for the time and effort you put into these videos Paul. Even after a good number of years in the trade I still learn something new or how to diagnose something faster. You're a great tutor with an ability to explain things in an easy to understand manner. Thankyou!
Remembering years ago I forgot to attach ground cable, the starter farted a while then the throttle cable started smoking like a good 'un.
Lesson learned.
Great vid, Paul! 👌🏼
Little more than 4 decades ago my, now long deceased, father in law. Introduced me to the joys of "sparky" in automotive. Clean and reliable contacts was probably the first and most important thing he ever teach me! Never fail on me once. First thing check contacts... clean or replace as needed. From flipper cars to clients cars, it as saved countless hours and head aches. ;-)
Hands down the best automotive repair channel on RUclips. Thanks for sharing your knowledge ScannerDanner!
Thank you so much!
@@ScannerDanner BTW, the voltage drop test is what led me to replacing the wire between batt neg and the block. Once replaced, the car started up quick (no more slow crank)! Thanks again!
@@2YLITE22 that's awesome man, nice job on your part!
A test light glowing when connecting frame and engine is such an impressive demonstration, I'll never forget it again. It's a rabbit out of a hat. I don't have many tricks when working up seemingly complicated problems but bad grounds are a fast way to look like a genius, ha ha.
The out takes at the end were a nice touch.
Nice- average person may never get one of these but showing this will save a ton of frustration that can be employed to every vehicle. 👍
Eek! Northstar! Take it away! Kill it with fire!
Learn something new everytime from you Paul. Thank you!
Kudos for exposing your human side, teacher. Watched this video in its entirety because I just inherited my mother's car identical to yours including dead battery. It made me smile to remember the first time I learned to jerry-rig an extra ground wire. It was in the '60s .. when I was 18.. and I found it myself. If I had videos like yours then.. then the space-time continuum would have been altered, of course!
Thank you the block ground was broken just where you said it was
Heck yeah, awesome
i have learned more in 4 month i follow scanner danner than before.
Thank you so much for the great video. Everyone was telling me it was the battery and starter and I was thinking it was a ground but could not find it. At the end of this video you showed where the ground from the body was . After tracing this wire I found that it was broken. Thanks to this video all I needed to do was replace the main ground wire from the body to the engine. Thank so much!!!!
Lmao, love the bloopers. Keep on doing what you're doing man, I know it's probably not easy to pay for, maintain, and make the time to do all of this! Especially with a class, course materials, a kid, a wife, and who knows what else going on. Just want you to know that some of us really, really appreciate your work!
+Chance George thanks so much my friend
pretty sure he just helped me too
My exact problem I'm witnessing right now today exact same symptoms and voltage readings, fuel pump running continuously, no scanner communication...I did all same test you did, I was suspecting bad ground all ready but the 2 volts at fuse box was making me look elsewhere and totally threw me off and started thinking bad positive lead wire, I thought maybe anti-theft was causing all this also, trying different keys and such, I even started thinking my volt meter leads were shorting out because of the crazy random numbers I were getting, but like you said a bad ground makes sense if you really think about it, this definitely was a head scratcher, thanks for video I'm going straight to that ground wire when I get back to vehicle, this video was right on time!
Awesome video, Paul. You really know how to teach.You draw subscribers like a Kmart blue light special. Thanks for the lesson. You may have solved the problem I'm having with my 1995 Taurus Sho .
Awesome video bud! Clear, concise, and to the point! Lately, the electronics of my 98 Seville STS have been going haywire, draining my battery, turning on my hazard lights without pushing the button.. alarm going off randomly a few times... I was about to tear out every last whispy hair from my head trying to figure out what the eff the problem was.. then your video saved the day!.. orrrrr atleast spared my wallet from a mechanic shop visit!
Cheers! 😃🎉🤘🤙
sweet! Glad this helped you
Excellent video on Ground testing! Interesting that you mentioned being cautious of having a ring on your finger when doing maintenance. During my Naval aircraft maint. training, they showed us a video of this guy's finger that had its skin perfectly, in its entirety, removed from the bone, when he slipped from a ladder and caught his ring finger on the engine! Glad you stressed Safety while wearing jewelry.
Admiral Nimitz lost his ring finger showing the engine of a WW1 submarine to tourists.
I witnessed a steamadore lose half his finger fixing something on our ship. We found it and it was reattached.
My caddy starter was clicking and I read a post on CadillacForums condeming the engine to ground cable, so thank you SO MUCH for making this video to confirm my suspicions. I loved your colabs with ETCG as well. Keep up the gread vids and god bless!
Really Nice find, I have a friend who i think would benefit from you find. He's got a ford with the same situation he called me for help i told him to check the connections 1st. don't jump around stick to the basics , i'm gonna send him this link and hopefully he'll understand NOW! what i'm trying to tell him . Thanks for your professionalism. Keep on wrenching ;)
Been having this issue for a few weeks checked ecm, checked key, this is so specific to the issues I'm having down to the headlights and fuel pump not turning off. Thanks so much
did you fix it
Yea the ground was ripped out of the body side of the connection. Ran a new connection and was back in business
@@csoul6699 I think I'm having the same problem because when I shake my car or close my hood everything connect again but as soon as I go try to crank it up it'll act like it want to crank but then it'll disconnect again I can slam my door hard and everything will connect so I think it's the ground wire
Can't hurt to check, you should be able to see them with just a flashlight and removing the plastic cover. It's probably hanging on by just a few wires.
I have a 2007 buick lucerne with the 4.6l Cadillac Northstar motor , first thing your video was a huge help thank you. No crank No start had it narrowed down to the fuse/relay box bc someone could push down on the relays while i cranked it over and it would fire up thought I needed new fuse box until I came across this video, ground wire bad .
THANKS AGAIN.
a perfect job for a power probe.
it's such a common issue you'd think all car makers would implement redundant block grounds. love the outtakes.
The best in the biz hands down.
I am a CMAT/L1 ASE tech, 30 yrs in GM dealerships.As shop foreman I have seen this exact same failure confuse younger guys.I have taught them to do loaded voltage drop test while cranking or start position to isolate faulty cable.Batt pos to stud,Batt neg to block.Almost always broken grd cable from engine to body on Caddy 4.6 and Aurora 4.0.Good video highlighting this concern.P.S.class 2 data on this vehicle is 0-7 volts.
Came here after viewing the no crank on a Dodge 2.0 and I wish I came here first. At the end of the video where you said just touching the ground and the starter went nuts clicking that's what happened to my car which is why I replaced the battery (no I didn't check the voltage bad assumption on my part but the car started with the new battery (ground was being made) Then my son got stuck with the car. Turns out the ground wire on the bolt to the starter was loose. Thanks for the video and the reminder that you need to start with the basics. TFS
+MostlymoparIH cool man, glad you got it fixed. Thanks for watching!
:> )
are these caddies subject to starter solenoid problems?
Yup my wife fixed our 2006 oddesy (confounded 2 mechanics already, whom replaced the alternator other the starter).. good that she refuses defeat...hours of videos on schematics, and circuits and every beatification panels and plastic removed from the car ,she stumbled on your video last.. heard a scream, "omg thats why I got a spark on the block when I was trying to use a screwdriver on solenoid and starter" as she was running outside (yes I may have stated my concern for her frying the whole system)..she found the ground wire in, idk, a minute maybe...eternally grateful, she saw your video before she took the van "down to the studs, so to speak, if I have to" .and she would've I tell you
His wife here lol..your ability to explain is second to none..so many videos always assume a mechanic is listen, so certain terminology and abbreviations are often used in their explanations...ty for always fully explaining where how and why you did something or started a certain place
This is so awesome! Your wife is too! Super proud of her
Oh man, I just commented to your husband too. I'm super impressed with what you did. Mad respect, seriously. You have no idea
My niece bought a 99 Deville. I told her not to buy it but she thought because I like her. I would fix all her problems. Now a trans shop want $3000 to rebuild the unit. I knew it was a bad idea for GM to put a 32 valve V8 n a FWD car.
Great video.
Sir .Your are the best teacher in the world .I never see before like your class anyone class.❤
Thank you so much! And welcome!
As an auto electrical mechanic(which I learned literally everything from you),the first thing I do,is hookup a 20 foot red and black corded jumper wires to the battery and use them as my power and ground source.
How do you come across these scenarios man?? These are awesome. ....you have too much knowledge dude. Much love
Wonderful video!!! Thank you! I have had many electrical problems with my Cadillac and have had quite a hard time tracking down worth while info on how to fix it. This video saved me a lot of time, and aggravation. Thank you from the bottom of my heart as well as my pocket!!!
What I find with certain professionals is this, those that LOVE their craft will always tend to work hard at it. You love what you do and it shows. I'm medical but I've been watching your videos for years. I'm pretty anal when it comes to learning I have to know things inside out. This video really helped me. I've done some voltage drop testing before and for some reason sometimes I forget to load the circuit. Anyway I have a 1961 Chevy Apache that I'm working on and the tail lights have from time to time given me trouble. At one point I found a frayed power to the tail lights grounding out. I showed full voltage at the tailgate. I bought a new harness really two new harnesses since they divide at the door then at the bumper. Fast forward 3 years up until now it worked perfectly. I go out and the tail lights aren't working. I like to use the Power Probe since its so long although I've seen situations where if I had a regular voltmeter with long leads it would be better. I have trouble trying to do voltage drop with the power probe. Anyway I found full voltage at the tailgate itself when I turn on the lights. The tag light would work. but not the tail lights.
I started thinking because of a video I had seen once that stressed power attempts to go to ground and it really doesn't matter if it goes through the ground side to get there. If I take a jumper from the battery to the back and touch the tail gate the lights turn on. Sounds simple but I was still wondering if some rodent ate through a wire and it was touching ground. The problem is there was no blown fuses. I disconnected the harness at the door and sent power back towards the tail lights without adding the additional ground and no lights only the tag light. I then disconnected at the tail gate and sent power through this is all with the power probe again the same. I kept saying it must only be a bad ground but of course unlike today's cars there was no ground all over the place back then. I now said to myself this has to be the reason sometimes that the engine wouldn't even turn over. If I went out and took a screwdriver and jumped it manually at the starter it would jump then the ignition key would always work afterwards unless I let it sit for months.
When you showed the 10 volts at the ground side I said bingo!! If I had long lead for my voltmeter I would've done voltage drop on the ground side I quickly found the issue I think. The power probe says it does voltage drop I need to delve a little deeper. Thanks for the video however simple it appears it was excellent. I think like Netflix You Tube should allow us to like dislike or love the video. This video I love
heck yeah man, this comment is awesome! Thank you so much. This video will help a lot with this concept too ruclips.net/video/GQvLHQVtC0Y/видео.html
Then this playlist (all ground circuit problems)
ruclips.net/p/PLAFYVCyenqcr32wgsCqa1Zj4335YlBF5p
@@ScannerDanner That was the perfect video for my situation thanks !
@@foreverwood1963 awesome! Does thr ground side voltage drop testing make more sense now?
@@ScannerDanner Makes total sense now
@@foreverwood1963 awesome!
Can't get enough of your diagnosis vids, great job.
Excellent lesson. And from a Fire/Medic, yes, lose the rings, chains, and secure long hair to mitigate the injury hazards. Thank you for the info Sir.
Haha at the out-takes. :p
It's good to show those because it makes people appreciate the time and energy it takes to put together video productions. Thanks!
Haha the Cadillac strikes again! I was a mechanic at a Cadillac dealer for about 5 years and saw that bad ground all the time. Maybe if they could make a front engine mount out of something besides nerf material, it would be such a problem.
Thank you Mr Danner you really help me with this customer's car oh my God you just don't know how much you help me thank you thank you thank you love your show.
old age is hell, lol. I had one came from guy that did mobile jobs, good mechanic but weak electrically. He pulled intake twice with new starters. Came to me with fuel pump running all the time, and communication problems. bad ground. I would like the engineering explanation of why the fuel pump is powered up with key off. Glad there were no leaking injectors. Very weird electrical issues with bad engine ground. great video.
Larry Hurst In short, the PCM was all screwed up (among many other modules) with incorrect voltage levels through the entire board. It is not a stretch for a particular transistor to be energized when it shouldn't be. Either from a misinterpreted RPM signal that really didn't exist (input side problem) or just simply the output driver itself turning on from a messed up voltage level at the base circuit.
I love the passion you have and are so brilliant And the best teacher ive ever came across .. my cadillac wont start no crank new battery and new starter goung to check the ground . Thank you
Wow, thank you!
Watching this video in 2022 to try to get some tips on my 99 deville with a no crank issue this is a very helpful video!
Did you fix it?
Wow, I have a 2004 Cadillac DeVille and I'm experiencing the same issue with no crank and I have a broken motor mount so that actually would make perfect sense So thank you for leading me in the direction you did brilliant man thank you.
You sir are an exceptional mechanic. Glad you are in a position to pass that knowledge onto your students
Awesome video man. Thanks for having a day job and not trying to be a RUclipsr. I love that you're to the point and have lots of experience.
Hands down the best he can never fail me
WOW Paul..that reminds me of my rarely used truck ( 1974) I unhook the battery because of parasitic draw..one day when trying to find it ..I did the ground to block test just like you did on the Cadillac ( not knowing what I was doing ..just brain storming) ..and the same thing occurred ,,and I was stumped ..but on some level though I could have weak ground...which is why I was watching this one ..SCORE
Dude you are an amazing instructor! Where do you teach? I wanna study under you.
I was an instructor at Rosedale Technical College for 18 years. I'm still on staff with a much different roll, but you can still study under me! I have all of my classes recorded and then some available on my website for $11 a month. Over 540 videos and counting with probably 450 hours of material. Hope to see you there! www.scannerdanner.com/join-scannerdanner-premium.html
It is really helping video. Many times I encountered to something same situation when ground was going bad from battery to chassis or on the block and crazy things were happening. You added nice shots in the end!
Amazing, ive had two mechanics walk away, but this is exactly what im dealing with, thank you!
You are awesome! I think determination and patience are key. Thanks for all the information you share.
Thanks for watching!
This totally helped me!!!! It looks exactly like the problem my car is having.. I'll go and follow the same steps I saw in anonther video of yours. THANKS ALOT!!!
This is something I always try to point out. *Check The Grounds!* The ground side of a circuit is often overlooked. Especially in newer cars,the computer(s) can go ape-shit-crazy without a clean power/ground feed.
just take some time to relax and come back with more great videos. thanks a lot .
I like the bloopers at the end. I would also thank you for the info. you put out in your videos. Take it easy.
U are the shit...literally I drove myself crazy and spent idk how much money on the same car,with the same problem...now if I could only find a easy way to replace that dam wire.....thanks so freaking much...you're awesome
Thanks! If I remember correctly, I relocated that wire for the same reason you are describing
@@ScannerDanner please tell me an alternative block location for replacing this ground! My fingers hurt and I'm all out of no no words!
The magic and mystery of electrical systems in autos you are king messiah awesome.Enjoy your videos and I’m glad you found your niche in life
Great display of checking the basics .
Great Video! Never overlook the obvious! I'm going to check my grounds.
How to change the ground wire to that started in this video for that Cadillac DeVille
you are an awesome teacher actually fix my Cadillac cuz what you just showed keep doing the good work I hope you get a billion likes
thank you!
Superb Paul just shows how easily we can be mislead
Mrs. Scanner Danner,
I think I am in love with you!
Thank you for this info!!
Mrs. ? 😂
@@ScannerDanner the last time you gave me some information I told you I loved you and would you marry me I was joking. So this time I told you your wife is now the person that I'm in love with because of the fact that she allows you to do this. I just didn't want any more confusion to happen lol
The Automotive Industry still has a lot to learn about failsafes and mission-critical design. I'm the first automotive guy in my family, and growing up surrounded by home builders and aerospace engineers makes for a rather unique perspective on how cars are built.
The long and short of it is that if airplanes were built like cars, the FAA would not grant them airworthiness, and when (not if) houses get built like cars, the builder gets sued out the wazoo. That sort of engineering right there with that Cadillac is a prime example.
Really good, informative video, despite not being shot in realtime!
rhkips Lack of fail safes and mission-critical design, who is to blame?
#3 problem - auto engineers
#2 problem - bean counters
#1 problem - . . . .
In all fairness to auto engineers, bean counters are more to blame for the lack of backup systems. After the new car is designed, the bean counters say, "Hey, looks great, now knock the cost down by $2,000".
#1 problem - US car buyers, if they all wanted super safe and well designed autos, they would buy nothing but Mercedes and Volvos.
D Nelson mercedes and volvo have just as bad electrical and mechanical problems as the next brand sadly. All manufacturers want is a low cost car to pump up sales, more sales = more money. And that will always be the case with the auto industry
rehlek
All cars have issues - Yes.
All cars are pretty much the same - come on! Really?
D Nelson The laws of physics are constant, as are the laws of electromagnetism. As far as diagnostics go, yes, all cars are pretty much the same. :)
Thank you just got 2002 deville watch your video before I got it and that is exactly what was wrong with it even my check engine light went off big LIKE THANK YOU
sweet! so glad this helped you, have a great day
Thank you for your video my ground wire was broken 4 gauge black wire from alternator to frame I was getting weird codes service theft system U1000. i connect that black ground wire back together and vehicle started Replace that broken ground wire
Great vid, out takes at the end Are brilliant 👍🏻😂 goes to show we’re all human and don’t get it right first time , mr danner your teaching and explaining is nothing short of excellence, keep up the good work
Excellent example of "ground-to-ground" volt drop, in a less than expected location. Likely becoming a more frequent occasion as it seems more vehicles are coming with "remote mounted" batteries (Acadia, Camaro...) Nice job...
I'm checking out your video cause I have an 2003 with intermittent starting issues. When the car is shutoff and heats up after 5 or 10 minutes it won't start, click, click, click. When it's cold it always starts never an issue? We checked the battery the alternator and it has a new starter so this video gave me somewhere to go, the engine ground and or the CPU ground. Thanks
today I could diagnose a brand new car only 7000kms on odo with no crank no start. other mechanics on workshop checked everthing before they handed the car to me. they said they found something funny on ground connector of control side of starter relay. It had 8 ish voltage on there. I remembered the theory you tought me by this video and attacked the problem. I checked the ground of control side on starter relay goes to engine block. checked voltage between block and bat neg. 8 ish volt was there. and finally found main power ground of engine block was losen by incorrect torque setting from factory. Many thanks Paul.
+Bong Keun Chee nice job my friend! I bet you were a hero in the shop that day. The cool thing about this kind of stuff? You will NEVER have to toot your own horn. Let your work speak for you, stay humble and people will know that you are the go to guy without you ever saying a word.
Man I have been going crazy trying to figure out what is going on with my Caddy no start. So I am thinking that what you are explaining woukd make mist sense. Here is my thought or question.... Would this also be the reason that when my battery is low and I have to get a jump that it only get a successful jump from the jump station under the hood and won't work trying to jump direct to the battery? That is what has been happening to me recently. Now I am not even able to jump start the starter through the relay. No reaction at all when I connect 87 to 30 in the relay terminal. I'm for sure not a mechanic, just a widow with little to no money trying to do things myself that my husband woukd have done. Drunk drivers really really suck.
I'm happy to share that my First thought, a strait away was a bad ground :-) so thank you Scanner Danner I'm starting te really learn things :-)
And the retakes at the end shows how much work you have to put into these videos, really thank you for that (and it funny :-p )
Thanks from a Dutch fan!
Amazing video!!! These are things that we do not see every day and having a reminder of how things work will save some of our hairs :) Love the starting struggle at the end lol
I know this is an old video but this is on my symptoms and I can't believe that you guys made this video this is helped me out so much 😅 all I am just a man with a wrench and I thought I blew my PCM Bcm
Awesome! Glad to help!
@0:44 “U codes in all of the modules that we could communicate with.”
😂😂😂 that pretty much describes every Cadillac out there whether it starts and runs or not.
one smart block...your instructions are very straight forward and usage of workds
Yo danner its vance bro how r things I stay in Florida now and years later I'm literally still learning from u ur the man lol
Vance! Great to hear from you my friend. You wrenching down there?
Yes sir lead mechanic 9-5 n side jobs outta work got a buick 4.6 northstar rn I be trading crypto too n forex...
Heck yeah man, that's awesome
Thanks so much for sharing and showing us not to be a parts changer. I wish there was a dude down here in San Diego that took the time to show us a thing or two. I'm sub'ing to your online course. Thanks
Like the other comments keep doing a good job my car been sitting for 6 months
loved it! I love that you are so honest. Even when things do not go perfectly... you take time to explain why. I respect "realism"! Hahahaha even the out takes! Just great!
Thank you Larry!
I'm 6 minutes in I bet the ground is bad on the block. My 1998 done the same thing it wasn't the ground I cleaned and replaced the battery ground with no results it was the alternator. Great video and knowledge my friend.
Absolutely LOVE these vids. Really appreciate the time and effort you put in to make them. Just a wee thanks from N/W Scotland.
Keep up the excellent work!
That mean so much to me Brendon!
I'm big fan of yours. Your videos really helps a lot.
thanks for the location of the ground cable. I couldn't find that information in Alldata.
Glad to help
I'm currently chasing the same/similar no crank issue on a 2008 DTS. If i push the fuse block towards the drivers side just right, i can get it to start. My first thought was grounds, but then i discovered the pushing on the fuse box thing. Now you have me thinking ground again. I was thinking there may be a/multiple broken wires coming from the fuse box. I rebuilt the rear one before I discovered the front one being the/near the issue. (I used 20g solid core doorbell wire to replace the copper traces in the rear box. I don't think they were really bad but some of them didn't look super pretty.) Downside is I have aftermarket power wire running right above where the engine ground connects to the body and considering pushing on the box can make it start i suspect that may be the end where the issue is.
The rubber in my top engine mount is bad so there may be excess engine movement going on. I'll follow up with what I find.
Yup wonky ground. The odd part is I put in an upgraded ground in parallel with the factory ground. You would think if one went bad, the other would make up for it. I was getting 10 mV - 200 mV when pushing on the ground towards the fuse box where it bolts to the body. Not nearly the 10 V you were getting, but my wire isn't broken nearly as bad. I guess it must be enough to interfere with the Data lines though. It may just be a corrosion issue. Hopefully it didn't go very far up the wire and stopped at the lug.
I made the wire with 2/0 CCI wire. Insulated it with Insultherm from wire care, the lugs are closed end and crimped on with double wall adhesive lined heatshrink. It looks like the heat from the engine compartment made the adhesive in the heat shrink ooze out, not sure if that is playing a factor. Possibly just need to clean the lugs and reconnect. I think I am going to try some Imperial Battery Protector or something similar this time as well. Otherwise i'm just going to have to make a new cable depending on how bad corrosion crept in there. Thank you for the video, saved me a lot of wasted time. I was probably going to start tracing circuits for breaks before I found this.
You, my friend, are AWESOME!!!!
Thanks very much for this common sense video, saved me a ton of time on the exact issue i've been unsuccessfully trying to diagnose for weeks on a DTS- keep the great content coming...
sweet! thanks for the comment
How did you fix it?
thanks you what I needed I told my nephew that it was not the starter but now he putting it back together after test showed starter was good .I was surprise how easy starter came out not really a big job ...............
You saved me and my wallet u are at the top. So happy you do these type of video, If theres a God may God bless you and yours , 2000 cadilliac sts broken motor mount happened first exactly like you said you are so spot on, smart !
Appreciated. Your the best video i seen. I am good with electrical, but couldn't figure b4 you..
Awesome, this is a voltage drop test in a since. Love the channel.
Thanks for the videos. Quite often it's a simple thing that throws us for a loop. I would be interested in how everything did after the cable was replaced, or was there more problems laying in wait.
Great videos! Keep'em coming.
Brad
bobkins270 everything was good
When I see electrical stuff acting backwards and crazy I think of grounds that are not connecting as then it tries to ground through other things.
This was a classic case as it made things run by themselves not even turned on.
Real good example was a taillight assembly with 1157 bulb. One light filament and one heavy filament. If it's not grounded correctly the light ( running light ) filament will ground through the heavy ( brake light ) filament.
This is a great video ✌️✌️