However, I can give you some general advice on what could be causing your brake lights to not work on your 1991 Chevy:
Possible Issues:
* Burnt-out bulbs: This is the most common cause. Check both brake light bulbs to ensure they're working.
* Fuses: A blown fuse in the brake light circuit can prevent them from working. Check the fuse box and locate the brake light fuse.
* Wiring problems: A broken or corroded wire in the brake light circuit can interrupt the signal. Check the wires leading to the brake lights, the brake pedal switch, and the wiring harness.
* Brake light switch: The switch on your brake pedal might be faulty. This switch sends a signal to the brake lights when you press the brake pedal.
* Bad ground: A poor ground connection can prevent the brake lights from receiving power. Check the ground wire connections.
Troubleshooting Steps:
1. Check the bulbs: Make sure the brake light bulbs are not burnt out. You can test them with a multimeter or simply swap them with another bulb you know is working.
2. Check the fuses: Inspect the fuses in the fuse box for any blown ones. Use a multimeter to test the fuses.
3. Check the wiring: Carefully inspect the wiring for any breaks, corrosion, or loose connections.
4. Test the brake light switch: You can test the switch with a multimeter or by jumping the switch with a wire to see if the brake lights turn on.
5. Check the ground connection: Ensure the ground wire connected to the brake light circuit is properly connected and free from corrosion.
Important Note:
* If you are not comfortable working on electrical systems, it is best to take your car to a mechanic for diagnosis and repair.
* Always disconnect the battery before working on any electrical components.
Let me know if you have any other questions.
