Looking for some advice on diagnosing rear camera and backup lights issue that seems to be common on these.
I’ve confirmed there is no power at the fuse box for the backup lights and all the other fuses were checked.
Bulbs are good, checked some connectors in the rear by the spare and at the camera connection in tailgate. Also cleaned and put die electric grease.
I did notice come buildup of fuzz and leaves behind the glove box by the cabin filter when I checked the connection at the HMI unit. I did notice that when I had the hmi out of its spot the backup screen went from blue to black for second then never happened again. Is there a way to test the HMI or are there any grounds I should check behind glove box by HMI? I don’t want to just throw a new camera in it and hope that’s it.
Also just to mention it’s a flood salvage truck that has never given me any issues but I also live in the rust belt so I’m thinking it’s maybe a ground. But also maybe the fuse box or HMI. Any help is greatly appreciated Thanks all ✌