Rear right/left brake light don't work,top center brake light doe
I have a 95 chevy blazer,(vin-w) and can't seem to find out why the right/left rear brake lights will not work,I'v tried all kinds of checks(been doen this stuff for years),but can't figure this one out.The top center brake light works good,and all the other lights work good too.The fuse is good.please help!
Do the non working bulb holders have power at the bulb terminals?If not back track to the one that works.The flow of power or earth is bad and its probably happening between working and non working.Do you have a trailer plug?make sure the joins are secure.Maybe two wires touching?Have you put an earth to one of the bulb holders that dont work.Try taking the working bulb out and see if the others light up,Hard to do or suggest test without vehicle there to work on and makes it hard not knowing exactly what tests youve done but suggested a couple in the hope that theres something that helps.Good luck
I worked at a GM dealer for 5 year's now and when this kind of think happens it's usually a circuit board that the bulbs plug into or if it dont have the circuit board style the ground wire in the bulb socket corrodes and brake's
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The wires provided for a radio system are as follows:
yellow = hot with ignition key ON
orange = hot from BATT at all times
Grey = dimming power from instrument panel
Black = ground
Harness Wires provided for the speakers as follows:
Left rear speaker = +brown -yellow
Right rear speaker = +dark blue - light blue
Left front door speaker and tweeter = +tan - grey
Right front door speaker and tweeter = +light green -grey
Note: connection colors at the speaker location differ as noted:
Right front door = +brown -yellow
Left front door = +brown -yellow
All other speaker connections are consistent with their harness colors.
Go under the truck and check the wiring harness to the rear lights, they are prone to problems in the harness, probe it from where you get a light on a test light to where you don't, then isolate the break
Some of these had two fuses for brake lights. One for the top/center stop lamp and another for the rear left and right brake lights. Usually one said "stop" and the other said "brake" and one was in the underhood panel while the other was in the dash fuse panel. It's not uncommon to blow a brake light fuse [LR and RR] if you tow a trailer but some of these had seperate fuses for the trailer lights also. If you have a test light check both sides of the two fuses for power [ignition key on] while stepping on the brakes. It should at lest narrow your search a bit.
A very common issue with these is the multfunction/turn signal switch in the steering column.GM has a recall on this problem you should contact your local dealership have your VIN number to see if your vehicle is included in the campaign. If so the repair should be minimal cost or no charge to you at all.
More likely it is the hazard/turnsignal/highbeam/cruise control switch module. It costs about $275 for the module. However there is a repair kit for the likely culprit...the hazard button. Try jiggling it around a little, see if that helps. Spray a little WD-40 into it so it can jostle back into it's correct position. You could try a junkyard unit or Ebay. It's not too hard to change. The hard part is doing it without removing the steering wheel. It can be done. I've done it. But hopefully you can locate the repair kit which costs about 15 dollars. Good luck.
I had this problem, and to be honest, it happened to the left side about a week later...it's the board that the bulbs plug into...it's a very common problem with this model. So popular that you can normally get the socket board off the shelf at a parts store! it's extremely simple to replace, and I replaced all the bulbs at the same time!
My fiancee' followed Ron's instruction, on where to find the brake light switch, and was finally able to locate it, get it out, and replace it with a new one. I now have brake lights. He had been looking all morning for the switch but could not find it, and he is an ace mechanic, so thanks to Ron for his expert advice. You guys are the greatest!!