Brake wiring diagram chevy lumina

I can almost 100% guaranty the turn signal switch is the problem. Power for the brake lights starts at the brake switch. power then splits from there and the third brake light gets power directly from the brake switch. Since the turn signal and the brake lights are on the same bulb power for the brake lights is routed through the turn signal switch. the switch depending on what position it is in will allow brake power or turn signal power to there respective left or right brake/turn bulbs.

If you hold your foot on the brake pedal and wiggle the turn signal and or play with the hazard switch the brake lights will almost always intermittently start to work. this will confirm a bad turn signal switch which is pretty common on GM vehicle with this style setup.

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i am CONFUSED? you say they dont work, then you say "when you press down on the brake that the switch for the lights causes them to go off instead of turning them on when messing around with it but couldnt figure this out"........ if NO brake lights work, then check fuse 23. . if the fuse is GOOD then check wires at the brake switch. Orange should have 12V, when brake pedal is pressed then the WHITE should have 12V and lights should be on. the center rmounted stop light (BACK WINDOW) has 2 bulbs, make sure they are good. The center light is wired differently. If the center light works but brake lights do not, the turn signal switch could be bad. I assume THE TURN SIGNALS are OK? IF the turn signals are working OK, the wiring between the turn signal switch and the brake lights is GOOD

See if bulbs have burnt out in the left brake light and rear turn signal (one bulb if combined) and also rear center high mount brake light.

If the left turn signal has a slower speed than the right turn signal, this is a symptom of a bulb or bulbs burnt out.

Usually, the wiring is not a problem, but I would not rule wiring (or sockets) as a problem out.

Good luck on this repair.

Most problems of this type have been traced to the headlight dimmer switch. Have the exact same problem with mine. When I hold the brake and wiggle the signal light switch the brake lights work.

What year?

Sounds like a turn signal switch. Earlier models would use the same bulb for the brake and turn signal. The turn signal switch will interrupt power to the brake light and route the signal to either the left or right bulb depending on with way you where turning. Usually you can wiggle the turn signal switch and get the brake light to work momentarily when this is the problem.

Newer vehicles use a lighting module that looks for inputs from the turn signal switch and brake pedal switch and then decides where to send power. This module is also know to go bad.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Check the turn signal switch. especially if the center brake is the only brake light that comes on when you step on the brake pedal. Sometimes wiggling the switch will get the brake lights to work momentarily.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

1. Check the fuse make sure it is not busted and also use a designated amp only.
2. Check the bulb and the wires also.
   

In a Lumina if the brake lights quit working but the upper one in the rear window still works or your tun signals flash weakly or a different speeds the turn signal switch needs replaced. I will cure the problem. Not to hard a job, but does require removing the steering wheel and air bag assembly.

sounds like a bad turn signal switch, wiggle it , just a little bit,... see if some of the lights start to work. do your turn lights work correctly??

This is a classic example of turn signal switch failure. On GM vehicles with a multi-function turn signal switch and combination stop/turn/tail lights (all rear lights are behind red colored lenses except for back-up lights) The brake light power is routed through the turn signal switch. This makes it possible for the right rear light to function as a stop light while the left rear turn signal flashes, and vice-versa. When the contacts fail to remain constant the brake lights, and turn signals can become intermittent. The proof that the brake light switch is functioning correctly is that the high center (cyclops) brake light functions properly. Wiring integrity is verified if you can prove that turn signals operate, but that can still be intermittent with this complaint, BUT if you use your hazard switch to turn on all the signals at once, you can verify wiring integrity. This is because the turn signal, and the brake light use the same circuit, and bulb filament in the rear lighting assembly. If any Hazard lights fail to function, check bulbs first, then retest. If all Hazrd light flash correctly and reliably, bulbs, sockets, and wiring have proven integrity, and the turn signal switch is the remaining component in the system which needs to be tested. Unfortunately, this switch requires disassembly of the steering column for service, testing or replacement. If you have never disassembled, and successfully reassembled a GM tilt steering column, I would reccommend professional assistance.