my guess is that it is the brake relay
brake light switch, it is typically located above the brake pedal somewhere on the brake pedal arm
check for bad switch under dash above pedal arm, generally fail after 75,000 miles
Have an electrician check the wiring that goes to the brake lights in the trunk of the car.
check that you have double filament bulbs in tail lights
check your bulbs
Check the brake light switch.
on some cars the tail lights and brake lights are totally different bulbs gain access to the bulbs and have someone push the brakes so that you can determine which bulbs are the brake lights and replace the tail lights
AnswerThe bulbs for the brake lights are usually separate from the normal tail light bulbs. Check and replace the brake bulbs first, and if they are still not working examine the fuses, switch and wiring.
try adjusting switch above brake pedal
What year is the Ford Explorer ? There could be a separate fuse for the lower brake lights
If the brake lights are not coming on in your car and you have changed the bulbs and the fuses with no results, you could also check the wiring in your '98 Chevrolet Lumina. The wires may be damaged or even broken.
If the fuses and bulbs are okay I would blame the signal switch assembly. They call it a multi-function switch these days.