How to Replace Tail Light Combination Junction Block 99-04 GMC Sierra 2500
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- Опубликовано: 11 сен 2024
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New Tail Light Combination Junction Block from 1AAuto.com 1aau.to/ib/1ALT...
1A Auto shows you how to replace the taillight harness junction block on a 2002 GMC Sierra. This process is the same for any full size GM truck including the GMC Sierra and Chevrolet Silverado, years 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, and 09.
🔧 List of tools used:
• Flat Blade Screwdriver 1aau.to/oLE/1AX...
• 13mm Socket 1aau.to/oEJ/1AX...
• Ratchet 1aau.to/oMt/1AX...
• Rust Penetrant
For More Info visit us at 1aau.to/h/aoG/
⚠ DISCLAIMER:
While 1A Auto strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. 1A Auto is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video.
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Thanks! I've been pulled over a couple of times and could figure out the issue.
Keep up the good work. I'll look at ordering parts through you next time.
Once again your video is spot on. I own a 2009 Silverado that is constantly having minor equipment issues (worst truck I have every owed). Over the past few months I had been fighting with the driver’s side taillight being dim and then just not working. After watching your video I ordered the part and swapped out the Junction block. Everything is now working and it took me less than 30 mins. I did lower the spare tire to make a bit more room for my hands. In the video you mention that the retaining bolt is a 13 mm, my truck is a 2009 and the bolt was actually a 10 mm. Other than that everything matched up.
+9251finley1 That's great! way to go keeping that truck running. We're glad to know we have been able to help you out!
having same issue but mine wont clip back on to my old one should i order the new block
Well you did buy a GMT900 lol. I just did this on my 06 Sierra Denali after 17 years
It was right there where you said. I unplugged the right side blew it out and replaced it and it now fixed my problem. These are great videos
You might want to plug the old taillights back in to see if they work right. If they do then it could be a wiring issue with the new lights.
Look at all that rust!!! I am glad I live in Northeast Texas. My 15 year Chevy don't have one spot of rust.
have replaced a bunch of these. up here in canada its do to all the salt and sand off the roads, its splashes up in there and the terminals corrode and rot off. some of them are in front or behind the rear wheels. depending on years and if its an suv or a truck.
my junction block works fine but the metal bracket that bolts to the cross member has rotted out and needs to be replaced. do you sell those metal brackets or do you have a link i can use to find someone that does sell them. thanks for all your awesome videos. i even have that very same truck in white too. thanks
+sroysr Thanks for checking us out! We do not carry the brackets but you may want to try www.partsgeek.com or eBay.
Did you find one? I’m also looking for a new plate.
You may want to ask the dealer or possibly check a Chiltons manual. You may be able to find a replacement harness at your local salvage yard, or possibly on EBay. Hope this helps you out. 1aauto.com 888-844-3393
Will this Junction block have anything to do with all my parking lights staying on all the time
thanks just Fixed my friend's truck :)
Thank you for watching! Glad to be of help. Please let us know how the repair turns out. 1aauto.com 888-844-3393
How have others tested this junction box and the neutral safety switch?
On a 2005 Avalanche, it's located on the inside of the right rear fender, rather than above the spare.
I was having the same issue prior to that's why i brought new lights.
Would the junction box cause the reverse lights to stop working ?
Have a 2003 chevy silverado 3500 dually. Right turn signal doesn't work in the back works fine in the front. Brake light and reverse light works fine. Changed the bulb, checked the fuses and replaced the wire harness still no signal. Do you think this is my problem or a wiring issue
2000 Silverado 2500, does not have this junction block. Taillight harness are wired into the factory harness?
what is that metal flat housing piece the combination junction block fits into?
I ordered the junction block and i hope it resolves my issue. Here's my issue: My tail light stay on, one side shines brighter and only half of the other works. I have brand new LED tails. It's not the tail lights so it has to be something else. Any help would by greatly appreciated. (2000 Chevy Silverado)
Very helpful vid👌🏽✅
I’m trying to do a Cadillac Escalade 08
I have a real problem ive looked everywhere and I have an 02 Silverado 1500 and it has no wiring from the junction box to the tail lights and I cannot find a wiring harness anywhere, can you tell me what other sivlerados are compatible or at least a good place to start thank you for your help
I have a grounding issue at the Rt Turn and Running light at the 7 way factory towing socket. Can anyone confirm if this this junction can be the cause? Can someone share a link to the schematic for all the harness that tie into this junction? Thanks
Having the same problem, have you fixed it??
your videos are very informal and to the point. I have a situation in my 2006 silverado 1500, when I hit the brakes with parking lights on the brake light on the right goes out. when no lights are on the brake light comes on dim but the blinker gets really bright and lights with the press of my brake pedal. any suggestions? thank you. this is only on the right.
+sammy mangini Thank you for checking us out. On the right side there is an electrical issue causing the power difference. You will need to trace and see where in the light circuit is causing this discrepancy. 1aauto.com
Ground issue
Will this effect trailer lights I have an issue with my blinkers my left blinker does nothing for trialed lights right blinker makes both blink. Hazards are dim on trailer. New lights and wiring new 7 pin female and 7 to 4 pin converter my junction box is hanging down broke off frame doe it ground to the frame?
i have a 2005 chevy 1500 HD 4x4..i am having problems with my passenger brake light,it seems good ,but does not work.i keep trying new bulbs but nothing works.the left side works great...any ideas?
Thank you for watching. It is possible the socket has burnt out. Remove the bulb and take a look, if this is the case you should be able to see its burnt or smell burnt plastic. If the socket checks out okay it is possible the Tail Light Junction Block has failed. . It is mounted on the rear frame rail behind the rear bumper. Due to this location, it is constantly exposed to the elements of rain, road debris, salt, & snow. Since it is electrical, this can cause it to corrode and then stop functioning. Please let us know how the repair comes out!
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Would this cause my blinkers to not work? Also they are getting super hot. I replaced both circuit boards and replaced the bulbs with LEDs hoping that's fix it but it didn't.
+Bo Dicaire We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c
I changed out that part on my 09 Silverado 2500 and the tail lights still do not function. I do have brake lights but no tail lights. What would you recommend I do next?
+Jesus Guardiola We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c
I have a 05 chevy avalanche everything works but my brake lights any idea what the problem is?
Razamanaz837 Iol i have the same problem did you find the problem? My taillights don’t turn on but sometimes they do and I don’t have no license plate light sometimes they turn on when my running light taillights turn on ? My brake light , reversed, turn signal work tho
I did this,,, then my trailer LH break & blinker did not work,, what next?
Where is the junction for the headlights
I have a 2012 GMC Sierra 2500HD and I have stock taillights but my passenger side reverse light isn't working. I switched the reverse bulbs to the opposite taillights and the passenger side still won't work but the driver side is so it's not the bulbs. Would this be more than likely the problem? Both were working just the other day.
+Derrik DeRocK it is very difficult to diagnose without inspecting the vehicle, but it is certainly a possibility. Good luck to you!
How about for a 98?
I have an 2002 avalanche, and my back light works fine sometimes and the times it doesn't work, I have to wiggle the wires in the back to get the running lights to work and stay on. I know this is a shortage sounds like but how can I fix this problem I replaced the tail light harness before and it still does it any ideas?
+King Leo Thank you for checking us out. There may not be an easy fix. You would have to trace down where the shortage is and replace the wiring from there. 1aauto.com
I have a 08 Silverado when I put my left signal my fuse blows
i have a 2006 gmc sierra 2500 my turn signal on back don't work and front ones work till I hit brake and they quit when I turn on one turn signal both back one work where brake light is but could it be the junction box doing that if I plug trailer light in the trailer plug they work fine on trailer any suggestions
Did you figure that out? I'm having a very similar issue
I have an 07 chevy avalanche and my tail lights work but not the license plate lights. Ive replaced bulbs and checked fuses with no luck. I wonder if that box could be the problem...
Thanks for watching. Your problem could be with the junction block. You may want to back probe the connectors for the lights to make sure you dont have power there first tho.
1aauto.com 888-844-3393
I have a 05 avalanche and my park light doesn't come on on my passenger side rear but all the other lights work "brake light, back up light and turn signal just not the park light how or what should I do to fix this
Thank you for watching. I would start with checking the bulbs, and connector.
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I have a 2002 silverado 2500 HD. The running light wire attached to the blue plug is broken. Is it possible to put the wire back into the connector? If not, where can I find the part number and or who carries this part. It is attached to the Junction block in the rear.
+brad strennen You might be able to. We carry the new one shown in this video on our website. Here's a link to them, they aren't a whole lot of money and we offer a lifetime warranty on them with free shipping. Hope this helps you out www.1aauto.com/1A/TailLights/GMC/Sierra/1ALTL00929?RUclips&CTA%20Comment&ATony
I have an issue with my 2003 silverado i bought the truck years ago And previos owner Was runing led light bars for tail lights Well they aperently cut off the plug that plugs into the junction box and i cant seem to find that plug at any auto shop the wires from that plug run from the front of the truck to the back and plugs into the junction block and i think it powers the block do you know what that plug is called or where i can find one thanks
Thank you for watching. You may be able to find plug in good condition from a truck in a local salvage yard. However you may need to contact a dealer to find it.
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Mine isn’t bolted on, mine is zip tied
Would you know what the plug is called??
HI Gabriel, It's called a combination junction block. Here's a link to them on our website, if you need one. We offer FREE SHIPPING on all order in the lower 48 states. Hope this helps you out. www.1aauto.com/search?words=1ALTL00929?VideoReply&RUclips&ATony
Would this fix my problem everything work except my taillights at night
+Jared T We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c
have a 2007 Silverado both lights work when in park,drive etc except when in reverse , the right led light turns off while the left side stays on any ideas?
Jody Martinez I’m having the same problem have you figured it out
I’ve replaced this junction block, bulbs, fuses, and the wiring harness and the tail light on the passenger side keeps blowing a fuse. I’ve cleaned and checked my grounds also. What could be the issue?
Not sure if you ever figured this out, but I would venture a guess that a piece of wire was exposed somewhere and touching the frame. Had this happen on a Ford of mine
I have a 2003 Chevy Silverado 2500hd driver running light taillight won't come on but when I hit the break it comes on. Any idea what It could be.
There might be a short in the circuit somewhere. You may want to see if there's a pinched or possibly a frayed wire, on the circuit. Hope this helps you out. 1aauto.com 866-403-3393
I have a 99 chevy sivlerado running lights work but no blinkers or brake lights I bought a new turn singal switch but nothing changed
Did u get urs fix I got 99 gmc 1500 with same problem
Can a bad junction block cause a fuse to blow? My left turn signal fuse keeps blowing. I disconnected to left turn taillight from this junction block. And the problem went away.
If you disconnected the light and the problem went away, it is NOT the junc. blok. Somewhere between the block and the blinker you disconnected.
@@maxprophet2401 that helped a lot and singled out where i needed to look. Found a part where the wire was exposed nearby one of the bulb sockets. Fixed it and no more blown fuses and turn signal works now. Thanks
Hello mike , i have a 2006 silverado and somtimes my tail lights dont turn on and somtimes they do . Its not the bulbs . Thinking its the harness or maybe this not sure or a frayed wire. I still have brake lights it just my tailights work somtimes but somtimes dont not sure what to do
It might also be a headlight switch acting up. If yours is going bad we carry new ones on our website. Here's a link to them goo.gl/zzfZw8
my headlights always work though?
Razamanaz837 Iol i have the same problem did you find the problem? My taillights don’t turn on but sometimes they do and I don’t have no license plate light sometimes they turn on when my running light taillights turn on ? My brake light , reversed, turn signal work tho
I have a 2001 chevy silverado 1500. Durring the day all lights work fine but when headlights are on and i turn directionals on all the rear lights including plate lights flash.what is causing this?
+Jay lawler It is possible that the wires from the turn signal harness are touching your brake light wires which may cause that interference.
I'm having the same issue. Cleaned all my grounds, sockets, checked the wiring and cant find anything. I'm stumped. Did you ever figure out your problem?
ronnie9471 I have the same issue !! Did you fix it ?
I tried news brake lights bulbs tried brake switch I'm lost
I have a 2004 gmc sierra- brake lights dont work- new bulbs- all fuses good, but no power going to fuses? Any ideas?
No power on fuses underhood or the inside block
If i add power with my power probe it will turn brake light on- the 25 amp stop lamp fuse is showing 12 v when vehicle is off
What is the blue connector for?
on my 03 Silverado it goes to the driver side tail lights. thinking I might have to get a new junction box because everything works except the running lights
Where can you locate this piece on a 2004 Yukon Denali
Look on the passenger side on the rear. That's were I found mine on my 2005.
@@nathanswartz5130 thank you I found it later that day haha
hi, I have an 01 Jimmy and the passenger side tail light and brake light stay on even after the car is shut off, they will stay on until the battery dies so I've removed the bulbs for now. Any suggestions would be helpful and appreciated
+Doug Dimmadome You may want to check the brake light switch to see if it is causing the issue. Hope this helps you out. 1aauto.com
would that cause this issue only on one side of the vehicle?
I have a 05 sierra and my running light doesn't work on my passenger side rear but all the other lights work. Replaced this part still nothing. Any ideas?
You may want to test the socket that the light plugs into with a test light or an ohm meter, if the socket doesn't have any power to it, check the wire also. You may have to travel down the circuit to see at what point you're loosing power. Hope this helps you out. 1aauto.com 866-403-3393
1A Auto Parts it gets power at the plug that connects to the tail light Junction block but that's it. No power to the socket that connects to the lights that do not work. Replacing the light Junction box did nothing in my case when everything pointed to it.
Wow. Totally missed a fuse under the hood. One fuse per side. Odd.
JR McAtee
Thank you for watching!
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I have a 2000 Silverado and my passenger side taillight is not lit up at night but it lights up when I apply the brake. The reverse and turn signal lights work fine. What could be causing this?
You might want to check the bulb to see if one of the filaments is burnt out. 1aauto.com
Ive replaced the bulb twice to make sure i didnt put in a bad one and it still does not work +IA Auto Parts
John Richards i would replace the tailight circuit boards. make sure you use dielectric grease in all of your connectors.
I have a 2002 cadillac escalade my brake lights won't work everything else works i changed the brake light switch and checked all the fuses but nothing, what could be wrong?
cristian prado I’m also having this problem. I can’t seem to find the issue. Were you able to find it? I’ve checked everything even all the hounds I could find under the truck and cleaned them all up.
i have a 99 chevy silverado and when i hit breaks my rear break lights in the back dont turn on but my Hazzard lights turn on and my signal lights work but when i hit breaks they blink fast what can it be?
Check the wire coming off of the brake light switch to see if it's frayed and coming into contact with something such as a piece of metal. If that's fine a blown bulb would also make the brake light hyper flash. Hope this helps you out. 1aauto.com
Did you figure it out I'm having a similar issue.
@@1AAuto I'm having a similar issue. Turn signals on the back of the truck work until brakes are applied then they stop working and brake lights start blinking instead slightly. Let off brake works correctly again. Also if I turn on the headlights my amber turn signals light up and stay lit....? Bad grounds?
John Kreimer you ever find out what was wrong I have the same problem