Reverse lights not working?

Hi Chris,

Unfortunately, this is a TIPM (totally integrated power module) based vehicle which means it does not have external fuses for many components. I included a wiring diagram that will help explain this. You will see on the diagram (upper right corner) where it says that it is non serviceable as it is a circuit board. This just means these circuits don't have external fuses.

Here is how you test this: If your bulbs are okay, then you want to measure voltage at the left rear light assembly on connector C2 pin 2 wire color WT/LG. With the reverse lights on, you should have 12 volts. If you don't have voltage there, I assume you wont, then you want to work your way forwards towards the TIPM measuring voltage at specific points. There is an inline connector that you want to check for voltage and make sure it does not have water intrusion. Then finally measure voltage at the TIPM on connector C8 pin 11 same color wire. The fact that neither side lamp works, either your issue is at the inline connector or the TIPM connection or TIPM itself.

I included locations and pin charts for each of these to help figure out where your power went. The last thing it could be is the ground however, if it is just reverse lights that don't work then the ground is okay because the stop lamps share that ground and each side has its own ground. The only thing each side shares is the feed wire.

Here are some links to so helpful guides on how to take these types of measurements:

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

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://youtu.be/Hlna_kUt7As

Let me know if you need more assistance and I will be happy to help. Thanks

Sure, the reverse light switch is inside the transmission, but I have seen the TIPM go out and cause the issue as well. Here is the location of the reverse light switch and the wiring diagrams so you can check it out and see how the system works. They call it a transmission range sensor. Check out the images (below). Please let us know what you find.