Check brake light fuse first. If ok, the brake light switch at the brake pedal may be defective. Try wiggling the switch to see if the brake lights work. If not, disconnect the wiring connecter and if it is just 2 wires cross them over and see if the brake lights come on. If they do, the brake light switch is bad. If wiggling the switch makes the brake lights work, I would suggest a brake light switch as well
SOURCE: 95 GMC Sonoma --- Brake Lights and Turn Signals --- NOT WORKING
yes , i have a 96 mine done the same thing , i was removing the dash cover to install a radio accidently broke mine , i had to push down on what remained and wedged a sheetrock screw to hold it in place till i could get a new one
SOURCE: 2001 dodge neon tail lights inop
looking at your schematics and , you say tail lights don't work , you didn't mention if front parking lights and license plate lights are working , they all come from the same source , a black /yellow wire , a good clue if front work and rear don't , please advise .if fronts work then you have a open circuit somewhere between junction S118 (near breakout for left headlamp) and rear sockets.
SOURCE: No dashboard lights or tail lights but I got Blinkers and brakes
most like u have a blown fuse most of the time in cars they connect the tail light and instrament lights to 1 fuse
SOURCE: 1998 gmc sierra-no brake lights,bulbs
Try this possibilities to locate the fault.
First get your voltmeter or 12v test lamp out. Check the 30 amp Brake (#2) maxi fuse in the under hood junction box.Fuse should have 12v at both sides at all times.
If okay proceed.
Go to the brake light switch. The orange wire should have 12v at all times. The white wire should have 12v when stepping on the brake.
If okay, proceed.
Next thing is the brake lamp relay in the underhood fuse box. Swap the relay with one that looks just like it and recheck the brake light operation. If the relay is no good replace it.
If the relay is swapped and still not working, see if you can feel the relay clicking when someone else steps on the brake pedal.
batt is power from the maxi fuse 12v all times
sls is the white wire from the brake switch 12v with brake applied.
gnd is body ground 0v all times
mfs goes to the multi function switch 12v with relay activated
the circuit is simple—power from the brake light switch white wires turns on the relay which then sends power back to the multifunction switch for distribution to the rear lights.
if you jump terminals batt and mfs the brake lights should come on.
If you have no power at terminal sls with the brake applied then you have a wiring fault white wire between the brake light switch and the relay
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