The question you ask is too involved for a proper answer. You need to go to a car parts store, and get a repair manual for your car. They cost about $16.00
time for an oil change
email me and I will send you a pdf on how to change the body tailight bulbs. vbdenny
burnt light bulbs
If the fuse is good and the bulbs are good, replace the flasher relay.
First remove the gray cover behind the light in the trunk. You should then have acsess to the bulbs.
GE 1157
you probly have loose light bulbs
If a 1991 Chevrolet S10 Blazer warning brake light always stays on, it could just be a malfunction of the light. To reset it, disconnect the battery for 10 minutes.
The VSS is located in the top left hand side of the transfer case.
To replace the light bulbs in the sun visor vanity mirror on a 1991 Ford Escort LX, the mirror will have to be replaced. This part does not have replacement bulbs readily available. If the bulbs are not working it is a problem with a fuse as these run off the battery and are on the same circuit as the interior lights.
tailight/parking/dash lights - look for blown fuse
Pop the trunk, pull back the trunk liner, remove the 5 plastic screws/wingnuts, and separate light assembly from the car, remove the bulbs and replace.