Check the bulbs- they are double filamented with the smaller for brake lights Check the fuse Check the sockets for power and ground
Check the sockets for corrosion
The light switch.
Defective reverse light switch.
Switch on brake pedal needs tightened replaced, or switch for lights needs tightened or replaced.
could be bad wiring
Try replacing the headlight switch. Do the front parklights work and not the rear ones? If so check the harness to the rear of the vehicle for breakage.
no, the switch in the steering column is bad and needs replaced.
The multifunction switch inside the steering column is bad.
Defective switch, switch not adjusted, blown fuse
How the brake lights work on a 66 Mustang is very simple. Power goes from the headlight switch to the brake light switch, then through the turn signal switch and back to the brake lights. There is no fuse in that system. There is a self resetting circuit breaker in the headlight switch, but, if that was tripped, none of the lights on the car would work. The first thing to check is the brake light switch itself by bypassing it. Unplug the connector from the switch and run a jumper from from one slot in the connector to the other. If the brake lights come on, replace the brake light switch. If they don't, the problem is either a wire has lost continuity or there is a problem in the turn signal switch.
check the fuse for dash lights
i have a 1995 Honda accord 4 cylinder v tec the tail lights sides lights and the dash lights stays on at all times have already replaced the headlight switch and still have the same proplome
Even after replacing the switch it needs to be aligned with the shifter. Put the car in reverse and then have someone watch the lights as you loosen the switch and then rotate it slightly forward or backwards. once the lights come on, secure it in position.