Where did u hook up the rear view cam?
I will try and explain this is best as possible.
The CAN/BUS module with the XTRONs HU/wiring harness made it a super easy install.
The yellow Audio cable from the HU to the Camera had a red + power wire coming off it at both ends.
1) The Yellow Audio cable will plug into the HU, the red + wire I tapped into the Yellow power wire going into the HU, super easy.
2) after mounting the camera in your desired position on the truck, the cable from the camera with go to intermediate harness. That intermediate harness has a Black wire - (unneed) and a Red + wire. That red + will attach to the Red + wire on the Yellow Audio cable.
I will try and get some pictures, it was a super easy. I spent more time running and tucking cables then actually connecting/wiring.
The camera I used:
https://www.amazon.com/gp/product/B07NRN4QSX/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1
The HU I installed:
https://www.ebay.com/itm/7-Android-...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649