Brake lights not working, third light works

Hi,

First, I attached the entire exterior lighting schematic below for you to see. I had to cut each of the two pics in half to make them readable, but I did overlap them so you can follow from one to the next.

Now, it can't be a fuse because the third brake light gets power from the same source. It can't be ground if other tail lamps are working because they all share the same ground. So, that leaves either burned-out bulbs or an open circuit in the wiring.

If you look at pic 4 specifically, I highlighted the wires, lights, and a splice. I also circled the splice. If you can, first confirm it isn't the bulbs. If they are good, check for power to the Green/Black wire going to the lights. Here is a link to help:

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

If there is no power to the sockets, then chances are there is a break at the splice I circled. You will need to follow the green/black wire back until you come to the splice to see if that is broken or corroded.

Try this and let me know what you find. Also, let me know if you have other questions.

Take care,

Joe

See pics below.

Thanks for the schematics and a place to look! I'll be able to get in there this afternoon and I'll let you know how it goes!

I'm looking at the fourth schematic you sent where you have the junction circled. Yep, that looks like a potential trouble spot as well as the connector shown just below it in the circuit.

Only one thing, I have no idea where in the back this connector or splice would be, i.e. which panels do I need to pull? Seems to me, the uninitiated, that it might be centered under the headliner or in the lift door near the center light as they call it. Any ideas or actual expertise welcome!

Hi,

Normally, there is a number related to the splice. From that, you can identify the location. However, the manufacturer didn't supply that information.

What you will need to do is follow the wiring until you reach the location where they are joined. If I had to guess, I would say it will be in the left rear fender.

Let me know if you are able to find it.

Joe

Thanks, that's going to help.

Pull the light assembly from the rear of the vehicle and see if you can tell where the wiring is coming from as well.

I know this can be difficult but hang in there.

Take care,

Joe

Joe, thanks! You are awesome!

Hi,

You are very welcome. If you can, let me know what you find.

Take care,

Joe