Brake lights not working

Good morning,

I would start by checking the fuse for the brake lights. I attached a wire diagram that identifies the fuse for all three lights. You will need a test light or voltmeter to test for power on both sides of the fuse.

https://www.2carpros.com/articles/how-a-car-fuse-works

https://www.2carpros.com/articles/how-to-check-wiring

It could also be the brake light switch as well. You need to verify power to the switch .

Below are some pictures of the switch. You can get it at any parts store.

Roy

Most likely you have a bad brake switch you need to have power going out when you step on pedal and when you release pedal there should be nothing. So you need to locate that switch it will be at top of brake pedal will have power in all the time and power out when brake pedal is pressed.

Did you verify the powers as in the diagrams I sent you?

Make sure you have available power to the switch.

Roy

Good evening,

I attached a diagram for you. There is a separate fuse for the right rear brake light.

Test that fuse with a voltmeter or test light for power with the brake pedal pushed down. You will need 2 people for this test.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

https://www.2carpros.com/articles/how-to-check-wiring

Roy

Good afternoon,

I attached a wiring diagram for you to view. You will need a test light to check for voltage to the stop light switch.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Roy

Hello and thanks for donating

check the brake light switch, it is located under driver dash near brake pedal.

If fuses, wiring, bulbs and brake switch is good then suspect faulty turn signal switch. Circuit shares signal with brake lights so signals may work but brake lights could fail separately. High mount brake light uses separate relay so it would not be effected.

Here is the wiring diagram of the exterior lights circuit to help you out, but i'm almost certain it's a faulty signal switch.

Does the high mount brake lamp function?

If that is the case, check the STOP LP fuse in the underhood fuse box for being open. If it is good, check that power is at the fuse with a test light. If there is power there, you would need to go next to the stoplamp switch on the brake pedal assembly. There should be a total of three wires, an orange at pin A, and two whites at pin B. The orange is power from the fuse, check that there is power there. On the white wires, one goes to the turn signal switch, and the other goes to CHMSL(high mount) fuses and light. When you press on the pedal, the white wires should go hot. Theoretically, if the high mount is not working, I would suspect this switch to be bad, but that does not explain the hazard lights not operating. If you can verify the STOP LPS fuse, and power at and through the switch, You may have a turn signal switch that is faulty.

Check splice 228, body harness, left rear of engine compartment, driver side. That splice shows to be all white wires, voltage to the splice comes from the brake switch. You can take the wires loose from the splice, one at a time, see which circuit blows the fuse.