Does anyone know the wiring or have a wiring diagram for the OBC plug / harness?? My OBC currently doesn't light up at all, buttons or display. I've tried 2 different OBC's with good bulbs etc and none of them light up. I do have a aftermarket radio installed so I know that is a possible issue there as when the car was picked up it had a power wire connected to a grounding point
. Either way, any help would be appreciated.

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