A bad light socket, corrosion inside of light socket, poor ground connection, wire disconnected/damaged, wrong type of bulb was used or bulb was installed incorrectly.
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you do not adjust the brake lights check the bulbs or check switch top of brake pedal.
The 1991 Volvo brake light relay switch is located beneath the drivers side dashboard. The brake light relay switch will be above the brake pedal.
Perhaps fixing the ground wire for the passenger side on the 2000 Chevy S-10 will require that the driver's side ground wire also be fixed in order to have the brake lights work properly. There has to be a short somewhere in the wiring for the lights to go off.
A malfunctioning brake light and flasher relay switch will cause the brake lights and flashers to stop working. The relay switch can be found below the dashboard on the drivers side of the passenger compartment.
Check wiring for 12v also the brake switch on the brake pedal.
Check the bulbs, check the fuse, check the brake light switch, in that order.
It will automatically go off when all the brake lights are in working order. Don't overlook the center brake light. :)
unplug your driversside assy and plug into your passenger side if that makes it work bad bulbs or bad taillight assy. try new bulbs first
rear car lights come on as an indication to the drivers in the back that you are about to stop.
The ground for the brake lamp. When the tail lights are off, the tail light circuit can act as a ground for the brake light. When the tail lights are on, it can't.
The ground circuit for your Honda Civic brake lights can be found on the rear frame rail. The ground circuit will be on the drivers side frame rail.