Hi,
This is a confusing one because power from the brake lamp switch is sent to the lights without interruption.
I attached the schematic below for you so we can work out the issue together.
If you look at the schematic, I highlighted the brake lamp switch. I also highlighted the wiring to the brake lamps. Note the dashed line connecting the wiring. That indicates there is a mechanical connection between the two components.
I have a question. Does the center brake lamp work regardless of the headlamps being on or off?
Let me know. Also, I have a feeling we are going to find an issue with the mechanical connectors, but that is a theory at this point.
Let me know your thoughts and about the center high-mount brake lamp. Also, let me know if the vehicle has an OEM trailer wiring harness.
Take care.
Joe
See pic below.
Image (Click to make bigger)
Friday, December 23rd, 2022 AT 11:51 AM