I just solved a similar problem on my 2003 Saturn. The tail light assembly had gotten wet on a stormy night with the trunk open. There was no problem until the weather turned cold. After looking at the fuses, relays, brake switch etc. I got my trusty voltmeter out. Testing the voltage on the light blue wires in my tail light connector I found the required +12Volts for the brake lights when the brake pedal was pressed. Checking the lamp sockets I found the 12 volts was still present when the brake pedal was pressed.
The water that leaked into the bulb connectors (right and left) and spread the contacts when the water inside them froze! Blowing out the water and pushing the contacts back together solved my problem! Lesson...Keep the trunk closed when it's raining hard and dry out the bulb connectors if they get wet.
SOURCE: Brake lights come on when i put foot on clutch Jaguar 2003 xtype
the brake switch is faulty or needing adjustment but not a big thing to change think i would just fit a new one
SOURCE: brake lights stay on all the time. tail light 95 mercury villager
Just had the same thing happen to our minivan.......went to the Nissan dealer, since the Villager and the Nissan are the same van, and they actually had the parts in stock. Tell them what is wrong and have them pull up the schematic. You need 2 plastic buttons that push in the holes by the brake pedal. It cost about $10 for the 2 of them.
SOURCE: trailer brake controller problem
I found the problem. Talking with a technician from the controller company, we determined that it was a fuse problem. I found that the fuse to the CHMSL was blown.
SOURCE: 2003 Toyota Highlander.The brake light on the
Replace the right rear brake lamp. The bulb possible use two filaments one for brake and tail light. One burnt out filament in one bulb.
SOURCE: Brake light dont work. 2006 chevy truck, 4.8L 2wd
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.
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