LSx Swap Harness How To Simple & Free DIY Standalone on the Test Stand
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- Опубликовано: 21 авг 2015
- Showing the cheapest, fastest and easiest way to setup your LSx harness in your swap project. Detailed video of how to make the stock unmodified LS truck harness work by just giving it power in two spots. This method is simple, free and gets the engine running, but it sure isn't pretty.
People often ask me how I run the LS motors without modifying the factory harness so I make this quick list of what I do:
- First make sure that the VATS (Vehicle Anit Theft System) is disabled in the PCM by having a tuner turn it off when he "Flashes" the PCM. (You may want him to turn off your emissions at the same time.)
- Give power to the main fuse block terminal post.
- Then give power to pin A9 of the C1 plug of the fuse block. This will be you ignition hot. Thats it.
- Make sure that you've given the fuel rail about 58 PSI of fuel and it'll run.
I control the starter with a seperate switch or you can just jump the solenoid.
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In this video, to supply FUEL to the engine, I used this very handy tool:
www.amazon.com/gp/product/B00G...
Starter trigger tool that I used:
www.amazon.com/gp/product/B000...
To have your VATS disabled from your PCM or to just buy another PCM already flashed the way that you want it, "CoolMike222" on eBay sells this service cheap and I know that he's a good trustworthy guy from previous transactions and interactions with him.
Here's a link for example.
rover.ebay.com/rover/1/711-532...
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The link below from LT1swap.com shows you a photo to help you find where to give power.
lt1swap.com/underhoodfuseblock...
Now, that's just one example. It's the cheapest, fastest and easiest setup, but also the ugliest setup. To accomplish other harness methods for a cleaner less cluttered looking install, you must not be afraid of reading a wiring diagram. Once you look at it and see where I've told you to give power to, then you can follow that to know where to give power if you chose to run without the stock fuse block.
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This is a small universal fuse block that I use when I cut the factory fuse block off for a cleaner look:
www.amazon.com/gp/product/B000...
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Q&A from the comments under this video:
Q: Can this be done with a drive by wire throttle body and harness?
A: Sure, I'd bet it's near the same. The main difference will be that you'll need to have the pedal and its harness connected as well, when running it. Also if interested, you can easily convert a DBW to DBC by adding the IAC and TPS pigtails to the harness and have the PMC flashed for DBC when you have the VATS removed.
Q: If I bring all the wires with harness like you did with fuse box will the trans still work also?
A: Yes
Q: Can I put this setup in my project just like this and everything will work and drive fine.
A: Yes, but there will likely be other wires that you'll want to hook up. One example is the TCC wire.
Q: What about the OBDII port?
A: If you'd like to use the OBDII port, you only have to find the one OBDII signal wire in the wiring diagram and run it and a power and ground wire to your OBDII port and it'll work.
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Keep on Wrench'n!
Mark 
Авто/Мото
If that’s not true then why do you have the best tutorial on RUclips LS God
Every time I look at this I see a bit more. Soooo ready to drop a ls in my 350, 53 Chevy pick up. Ready to take the plunge.
Me too!!
thanx to zane for safety awareness n best laugh i've had in awhile , glad to know no toes were harmed in making his video
I still can't believe its that simple. Thanks for sharing this with the world.
U just saved me more than the cost of my 5.3l on not buying a harness. Thank u.
Honestly the most straight to the point and in depth video I have seen on LS wire harnesses, Thanks man!
Shimzon Awesome! Thank you for your feedback Shinzo! I appreciate it man. I’m glad that you enjoyed it.
@@AGearHead4Lifedo u have a stock harness or a terminator x
I just fired my ls. 3 hrs ago for the first time. thanks to this video! !
Awesome Juan! Thats what I like to hear! Congrats brotha!
best video on LS swap online right now...period!!!!!
Junkyard Doggs Thanks Junkyard Doggs!
I second that
Yeah man im not fake thats why. I dont know everything and this man just taught me something
I gotta start doing!
You the man! I had just gave up on a EFI LSx swap mustang, for a carb'd setup until i watched this video. This is simple!
Awesome video! Greatly simplifies the complex wiring system! Makes it even more feasible to swap in an LS into a 60's Chevy.
Thank you for bringing up what sensors don't need to be plugged so it can run! video came in clutch.
I watched this vidgeo years ago and thought it was good and helpful. I’m now, considering doing a ls2 swap and t56 in my 2007 Mercedes c230. So this was nice to see again. Very informative
This is the best video on RUclips for getting a LS motor running with factory harness.Thanks for posting
That was the most clear demonstration ive seen. Amazing how electricity can be confusing at first glace but isnt at all
anonymous hypopotomus Exactly! Thank you! I’m glad that you enjoyed it. Keep on Wrenchin!
@@AGearHead4Lifeif u keep the steering stock column can u get away without having to delete vats
U da maan bro !! Got my 5.3 sittiing in my backyard... Im dropping it in an oldschool... Taking notes ...
THANK YOU ... !!!!
Awesome Eddy! Glad I could help. Good luck!
Thank you for your service 1st and foremost🇺🇲!!!!
I will be installing a 5.3LS in my 92' thanks to your VERY SIMPLE instructions.
I was toying with putting a 6l into a 90s chev short box 4x4 but was a bit reluctant till I saw this. Thank you so much!! Makes it very simple
This, by far, is the BEST LSX video on RUclips!! Thank you!!!!
Thank you 90FLSTC!
Thanks again Mark... you show us all the stuff we want to know. Great work, as usual.
Awesome! Glad you enjoyed it!
Man I been. Searching for someone to explain this like u for months thank you finally I can start my swap
hell yea! thank you very much! Helping a friend remove engine and harness from 04 gto to put in a 95 impala ss. Been dragging feet last couple days on the wiring, ready to get er done now! thanks to you this project just got a kick in the rear
couldn't get mine started with 3 wire harness from Craigslist. put the old harness back on followed this video and she started right up! Thank you sir you are a life saver.
FinoNick Awesome! That's great to hear man. Glad that this has been helpful.
thanks dude got my 5.3 running today cause of this
Awesome Darrin! That's what I like to hear man! Congrats!
AGearHead4Life
I have a 5.7 want a 5.3 soon as I confirm I know what I’m doing is correct
AGearHead4Life bro I apreciated your vídeo the only thing I’m new about this you said we have to had the pcm flashed out what is that?
@Haz Cat 1000.00 bucks
I walked into my buddy's shop while he was on the phone trying to explain to a customer how difficult this conversion is gonna be, when I showed him your vid, he was completely blown away! Needless to say all of us (his customers) are now on the hunt for LS's!!
Dude wtf i was about to buy a whole sniper system and custom harness , you are the GOAT
thank you very much for this valuable information it takes a lot of the guess work out of my swap projects ,KOODLES GO OUT TO YOU SiR!!!!!!
Dijon Anderson Thank you Dijon! I’m glad that you appreciate it.
I started my engine yesterday thanks to this video. It's sitting on a small lawn mower trailer. I even sent my computer to your guy for my VATS delete. Worked like a charm. Thank you once again bro.
Who is the guy that does the computers
@@cashnezcarterout9472 cool Mike on eBay
Hi could someone be more specific about “cool Mike” on eBay please
I got my LS fired up in my 1959 Apache. Thanks for the video! It went totally smooth, and I was tickled to death! Thanks bruh!
I followed this to the last letter of the law! It worked perfectly! Thank you, and my 59 Chevy Apache’s thanks you, too! Great video!
excellent work
I love the way you explain things, idk makes it easy to understand. Could you do a video on how to dress up a wiring harness so it's not so bulky?
Riley Marsh Thank you Riley! I really appreciate your feedback.
That video is on my to-do list. I hope to get to it one day. Right now, I’m still in the process of move though.
I finally get it now! You explained it better than the 191-page book I just read on how to swap an LS. This old gearhead is ready to come to the 21st century.
By far the best engine stand test video! Thanks bro. You're a genius
I love you for making this video thanks man!
Maxwell Harmon Haha! Thanks man! I’m glad that you found it helpful. 👍
Thanks for the info! The best part about an LS Swap is all of the hurt feelings when I lift the hood of my old Ford.
haha No problem! Glad that you enjoyed it.
Got any tips? Im gonna try putting a 5.3 in a 99 mustang that was originally a v6. I know itll all fit. Only thing I worry about is all the wiring and where to put stuff really. (First big project)
i like u.
Blasphemy! That is unnatural.
Will it work with a drive by wire
I am currently ls swapping my truck this helped me out a lot thank you and you just earned a like and a new subscriber
I'm LS swapping an S10..this video is awesome. Thanks for putting this info out there
Finally just watched and I love it ! -- Zane
Zane Parker Thanks Zane! BTW thanks again for letting me share your video to help others remember not to make that mistake.
@@AGearHead4Life thanks for info. What about after getting the swap started what about the tcc wires
Thanks for the post bro. I was able to start my junk yard 5.3 tonight on the stand to verify that it runs. This method Worked like a champ. Thanks again!
Awesome Mark! That's what I like to hear!
So can u drive it like that too I’m doing a ls swap in my 88 Chevy s10 I’m take motor and trans and other stuff I need out of my 2001 Chevy 1500 so what do u thinks first ls swap
Were you able to start yours without having pcm flashed? Just wondering.
@@Dallasdoesstuff84 You can start it but it'll only run for like 2-3 seconds before the VATS shuts it down.
Thanks for this video! I'm swapping a 6.0L into my 68 camaro and the harness is a total mystery to me. This video really simplified the what is needed to get the engine to turn over. THANKS!
+Elias Soto Great Elias! Good luck on the swap!
Your bad ass, ive been watching your videos as you make them.Your really getting me more inspired and comfortable to this swap. I have had my truck LS mounted in my 68 camaro and will me setting in the harness and starter to try and get it to start and run this December.Thanks keep doing these video.
+Gilbert Cordova Awesome Gilbert! Thank you for your feedback and support.
Lmaao..you had to shout him out.."whew buddy..that was something differnt"..i love that video..
BEST ENGINE KNOWN TO MAN. I like your style gear head.. The video should be called how to test fire 99-01 ls engine using unlocked pcm and stock fuse box with little effort.
Thanks Travis!
Will this work on an 04?
Thanks for posting this video I have more confidence now to do an ls swap in my 99 1ton
Straight to the point more action and less talking very well explained u deserve around of beers thanks!!!👍👍👍👍👍👍👍👍👍👍
Thanx
FINALLY A STRAIGHT ANSWER! !!!
+Clint Cornett Took YEARS! for someone to finally make this video lol
Nice I had my ls running in one day thanks for the advice keep doing yo shit
+Jo Jo Awesome! Congrats Jo Jo!
Thanks man that is way better than the other videos I watched thanks
Thanks for the info man, much appreciated. Absolutely killed it with the video. Very good clear to understand information.
i been putting off installing a ls in my 83 c10 but now it's on :)
It's 4 wires on the obdll port pin2,4,5,16 2 is cereal information, four and five are grounds, and 16 is power. And the serial information on your PCM is pin 58 on the blue connector
Best 🇺🇸 LS swap video ever you got me all pumped up now I want to put LS on everything thank you keep up the good work👍✌️
You just saved me a crap load of money. I was gonna buy a $750 harness and cpu, but now I will just do what you've done here. Thanks a bunch
+dawan antonio No problem! Those custom harness will look a lot better though. If you decide get get one that's cleaned up, I know a guy that is much cheaper than $750. I believe he'll redo an old one for closer to $300. Check out "LS Wiring Harness Conversions" on facebook. Good guy.
Put a shut off valve right where the air goes in on that canister, it'll run quite a while on it. I've done that to move cars around that have dead fuel pumps. I usually set the pressure a little low so the regulator doesn't open.
Good idea
Link to "CoolMike222" on eBay for VATS removal now updated:
rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=11&pub=5575162067&toolid=10001&campid=5337841854&customid=&icep_store=coolmike222&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
That's a good question that I'm sure he'd be able to answer. Shoot him a message and see what he says. IT's be a couple years now since he's sent me a PCM and I was living in AL at the time. I'm an on-line shopper though, so i've gotten use to waiting a week for an item to come in the mail. It doesnt bother me at all.
hi my name is steve im trying to build a ls to put in my Oldsmobile cutlass whats the best way to go ??
Hey Steven. I'd need a more specific question to help you out, because you wouldn't necessarily have to build it at all. just drop it in stock and it'll still be great.
AGearHead4Life where are you from man would love some hands on
mattsworld17 I'm now living back home near San Antonio, TX.
GREAT VIDEO! Very refreshing and straight to the point. Thank you!!!
Looks like I'll be doing this for my swap. Very helpful, thank you brother.
Lenord Delafuente Glad to heat it! Good luck brotha!
Hey bro! This video helped me so much for my 5.3 for my stand, is there any way you can explain how to set up a DBW 5.3?
I picked up my L59 from s 2006 Tahoe. I got it to idle on the stand. I picked up a DBW gas pedal from the yard today but don’t know how to connect it to the harness/fuse block. Can you show us how to set up a DBW set up?
Keep on rockin on! 🤘
man thank you bruh!!! you have the best ls swap sites out period!!! very well explained!! I'm finally doing my 5.3 swap in a 3800 camaro...wish me luck lol.
Great video sir! It's nice to be able to have this video out there to reference back to.
greg aiken Thank you Greg!
Me acabas de enseñar mucho, aunque casi no te entendía por el idioma.
Awesome! Glad to hear it Adrian. Yea, I speak fast and I'm sure that doesn't help.
AGearHead4Life you grad in 98 right?
Yep!
The Ls god !!!!!!
hahaha Funny, but thanks man. 👍
Hey brother, this is absolutely impressive! Love the mods and the truck is phenomenal. I have an 87 Sierra that I'm in over my head with but trying to figure it out. Semper Fi!
Thank you Devil! I appreciate your feedback.
What are you trying to figure out?
Simper Fi, Mark
Man thank you for this video now I know what I’m going to be doing in my garage this winter 🥶 thank you man 👍🏾👍🏾
Just so you know, the ignition wire is the same for a vortec 4.3
Good to know! Thanks for sharing
Thank you! Buddy is doing a 5.3 swap in a Astro Van..
The Rick Fix Could use this info
great video! i am dreaming of doing a LSswap on my 83 Sierra Classic. Keep up the good work :)!
Thank you, I'm right at this point with my hot rod project. Very clear!!
Informative video bud......Do you have black painted toenails!?
+Justin Cooper Thank you Justin! No, it's a single stage gun-metal grey foot paint job.
+AGearhead4Life Just bought a 98 silverado k1500 4x4. Hope to do ls swap soon!
+Justin Cooper Sweet! Good luck!
did anyone else notice he has painted toe nails?
yep, quite a few did.
JLM I did, but he has it figured out, to each his own,
haha Thanks Dean! You should see the earlier videos when I started it with wood blocks supporting the front of the pan. Talk about scary. ha
What happen with the bcm how delivery the signal for the ecm for active the injector.
Roman Bacame This harness model didn't have a BCM, only a PCM and its there controlling the injectors. The BCM controls the body stuff.
Definitely a bad ass...thanks for taking the time
thanks. I did know about the brake pedal for the converter release. I found the fuel pump relay wire and managed to wire all that today. I had the 52 Chevy running today for 20 minutes. Tomorrow will move to the Plymouth coupe...again thanks
Can I have one of ur gearhead stickers
+95silverado1983 Sure, I have a motivational sticker that I can give you. Shoot me your address in a PM and I'll get it to you. Also, if you'd like one of the 6 inch "AGearHead4Life" window decals, PayPal $2 to agearhead4life1 AT gmail DOT com and I'll get one to you. Make sure that you leave your address in the notes section when of the payment.
Yo these videos are very informative, noticed you are a Marine . I'm 0331 . But I mean no disrespect just wondering what the deal is with your painted toe nail my man . 🤔😐
When you have a daughter and she wants to paint your toe nails it's pretty hard to say no.
Awesome! I can't believe it's that easy. I'm goon give it a shot.
Awesome video Bro,Thanks a lot never imagined it was that simple.
this is fucking awesome, but how do you erase the security system on the ecu?
You have to take it to a tuning shop and have them take it off, via hp tuners or something like that.
There's a couple ways to do it, one involves swapping it into a silverado and doing a reset process and the other is a camaro i think.
I have a 2006 Silverado with a 5.3 and another ecu from a 5.3 that I need to have the vats remove is there a link that you can direct me to
Just look up GM VATS REMOVAL, and there should be a few videos that show the method of using a different chassis to remove it. I don't want to go too far into detail because it could be used nefariously.
A link to have your VATS removed is in the video description.
thank you so much... hit or miss on good videos. well done
REAL TALK...DUDE YOU HAVE GIVEN OUR PROJECT LIFE....WE WERE ABOUT SPEND ALOT OF MONEY AT A LOCAL SHOP....BLAH!! BLAH!! BLAH!! THIS WORKS... GREAT...JUST GOTTA FIGURE OUT SOME OTHER STUFF AND SHE WILL BE STINGING!!..MUCH RESPECT FOR YOU DOING THIS VIDEO... THANKS ALOT
Robert V tutt That’s what I like to hear! Glad to help brotha! Good luck on the project!
Keep on Wrenchin!!
I like the way you keep it simple to understand, and well explained.
Good Job!
I would like to see more.
Thanks.
Joe V QCC
Thank you Joe! Hopefully I'll be getting more up soon.
Thank you now I can get my OBS going and go missing this summer. Watch out mud crickets here I come 😎
Wow that's awesome! I have been thinking of getting this 5.3 to put in a 31 Ford rat rod but didn't want to spend the money on a stand alone and don't have the time to mess with all that spaghetti. This is super simple!
Thanks so much for this video. It helped me make my mind up I’m going to ls swap my 1985 Trans am
just wanna tell you I did exactly what you said and did and it worked great, thank you and also a awesome informative video
great presentation Marine!
Never knew it was that simple, everybody makes it seem like it's extra hard to do. Thanks AGearHead4life
jojow241 NP man! Most make it sound more difficult because they believe that you have to strip it all the way down to individual wires. You only have to do that if you want to complete customize your harness. I usually don't have much time, but want it to look a little better than it does with this bulky fuse block. So I take it one step further than in this video. I cut the plug off that goes into the fuse block from the harness and use a smaller universal fuse block to give power to the same wires that had power from the fuse block. It's basically just all the pink wires.
Thanks! This gave me a better understanding of the whole wiring process for the LS. 👍
Excellent! That's what it was meant to do. This is the first step in LS swap wiring. I made it as simple as it could be. When I get a chance to do another video on this subject, I'll step up the difficulty level a notch.
great info will get a 5.3 with all the stuff needed to get it to work like you did. tks a lot
Had a buddy turn me on to this video, thanks man, AWESOME 😎!
I like this guy he makes it simple not complicated 👍
Thank you Mike!
Thanks for sharing this super DIY tip brother.
+solarpwrdude NP glad you enjoyed it.
man you my hero workin on my swap now just started I'll be back
I used a $25 stand and mounted with Dingo mounts. I had to flip them so it would bolt up. I also made a "fuel pump" using and small tank with barb fitting out of the bottom, air compressor in at the top. It fired right up. You shoulda heard my wife after I started it with no exhaust in the garage lol. Thx for your vid's and info dude.
This video just took alot of headaches away thanks!!
Timothy Springer Excellent! Glad to be able to help.
Finally a video with full details!! I got a 86 swb c10 im really wanting to do this and use my 700r4. i hope this doesnt cost a fortune..
I found this helpful.. I'm currently in the process of picking up an LS from a junk yard and the included wiring harness, thanks for the heads up!
Awesome! Glad to hear it Gerry! Good luck!
So I commented a few months ago asking questions about a 5.3 complete with wiring harness and I planned on swapping it into my c10. I saw the video and got bored, so brought the engine to my apartment house at school. Started it in my driveway after a buddy with HP tuners pulled out the VATS for me. Had a spare walbro hanging around and it did the trick. Just need to find a trans that will work and the swap will start!
+MechanicsMike Awesome man! Glad to hear that you're making good progress! Get it and Keep on Wrench'n!
very simple and explained well and answered all my questions great vid thanks
Aaron Sprankel Glad that’s hear it! Thank you for your feedback.
got my 5.3 running Thanks for sharing
De Ross Awesome! Glad to hear it Ross.
im trying this next week. thanks mark