Brake light switch was replaced and didn't solve problem. Also the brake lock out system works fine. All other car light work including the tail lights which are also the brake lights when brake pedal pressed.
Have you probed the tail/brake lamp socket to see if power is there or you just assume it is? also make sure the ground is good for the brake lights Do that if not done already and let me know.
SOURCE: my brake lights do not work tried replacing fuse
Is the brake light switch hooked up. The wire can be broken near the switch and the switch can fail too. do the turn signals and 4 way flashers work? Course if you have yellow turns then that test doesn't prove anything, The grong to the tailights can fail it's near the trunk latch under the trim, Wire can be broken putting heavy objects in the truck. Does the high mount brake light work? The bulbs in them don't last long the harness to the lights in the trunk lid get in troble and fail too. The light out module has more than one power source and all three have to be good for the brake lights to work does the dash moniter turn on the warning light when you put the brake on with the key on? If it does and the lights don't work the three circuits are good but if the warning doesn't come on and the lights still don't work then your still looking for a blown fuse. even the cig. light fuse has to be good, Check all the fuses with a test light as some blown fuses can look good and be bad.
SOURCE: I have a lexus ls400
re please and grease the inside the wire harness be for putting in bulbs.
SOURCE: 1991 Lexus ES250 Rear Brake Lights
first of all the brake lights are always in the rear only!!. take the light bulb out and while some one is appling the brake pedal check to see if yo have power at only one terminal of the socket, then release the brake pedal and make sure yu dont have power at the same terminal , now if you had poer in one of the terminal then you have to replace the socket for the brake light bulbs.
look under the dash board right at the brake pedal switc where the brake light switch is located and make sure that the wires are not broken, you can also do a quick check by just disconnecting the brake light seitch and then jump the terminal off of the brake switch and you should have light if the light works this way then you have to replace the brake light seitch
SOURCE: LS400,1996,replace rear window brake light bulb(s).
THREW THE TRUNK RIGHT UNDER WHERE THE LIGHT IS MOUNTED THERE SHOULD BE 2 WIRES GRAB AND TURN THE PLUG AT THE END OF THE WIRE THE PLUG WITH THE BULB SHOULD POP OUT
SOURCE: brake lights and rear deck light do not work.
Check the brake light switch under the dash near the top of the brake pedal, the button might be stuck in, or the switch is bad.
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