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camera shows open line error

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2014 silverado new body style wt quad cab


I upgraded to io6 from io4 with the 8 inch screen. I added a back up camera. I had WAMS update my hmi.


Now I have a black screen with directional lines and the ECU says I have an open line error.  error codes B101E, B127B, U15F0-00  from the module


could the truck not been fully wired? The dealer was no help on that, just error codes. I have a 6 pin plug in the rear mod and the grey and yellow striped wire and white wire is there, but i do not know where they end up. I lose them in my search.


I have had issues finding a schematic to help, the wrong year, the wrong model is easy to find. I need a back up camera. please.


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