1998 Chevy c/k 2500 rear light issue

Asked by Aug 07, 2014 at 01:22 PM about the 1998 Chevrolet C/K 2500 Silverado Extended Cab SB 4WD

Question type: Maintenance & Repair

I have a 1998 Chevy C/K 2500 4WD that has a rear light issue... The driver side rear light
is not working properly. The turn signal, brake light and back up light does not work,
however the driving lights work fine. I have tried to replace the circuit board in the taillight
with both dealer product and off market products. They all have the same issue. Even if I
put the new circuit board in the right hand side the same result happens, no turn signal,
brake lights or back up light. Interestingly enough if I put the left hand circuit board in the
right hand slot everything works perfectly... This tells me the wiring is just fine... Does
anyone have any suggestions

3 Answers

This will go full screen, if it's any help. I am thinking ground somewhere also I don't see any wiring to third brake light, and according to my source they were required beginning in 1986 for cars and 1994 for light trucks. Does it have one? Maybe something to do with that..? Throwing guesses

3 out of 3 people think this is helpful.

I thought it might be a ground issue as well...but if it were then the right hand circuit /light wouldn't work either but it works fine when hooked up to either light. Thanks for the insight .... it is very perplexing

12,545

Do you have a trailer hookup? I have heard issues with that hookup causing problems with the tail light system If you can unhook it easily see if that works, Sometime the pins short out or become corroded causing issues. The wiring diagram looks like it comes off one fuse. If you have one set of lights working, then you have power past the fuse. Check where the wire splits off to go to the set of lights not working and follow it to the bulbs. If you have power to the bulbs but not through the bulbs, you may have a ground issue. Check, starting at the common ground, clean the contact connection and make sure the wire is not cracked or "open". Put a wire from the ground side of the lights to a secondary ground and see if that works. If you have power all the way back to where the light wire splits, then that is where you start. If you have two different wires running back and one fuse, start at the fuse box and go backwards toward the lights. You might even try changing the bulbs and make sure they work. Stranger things have happened. If you don't understand the wiring diagram, ask around for someone to help read it. It will save a lot of time and answer a lot of questions, plus give you a starting point.

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