Servus, since there is not so much to the Master/Movano I have posted it in both areas. Mine is an Opel Movano B from 2017 Euro 6 with 170hp. Just to the story…Wanted to install a rear camera and want to tap the lines from the light to the reverse. Since I have no schematic and also did not want to pierce the lines I came to the stupid idea to measure on the conductor. I inserted the reverse gear and on the conductor track memes The result is that the two reverse lights (i.e. on both sides) are off. The other lights like flasher, standlight etc. work. I have already looked on the internet but unfortunately you find very little. The master obviously has a load circuit and something was still standing from a body control unit. Unfortunately, I do not have a control unit for ebay. I don’t know how exactly the load circuit with the master works… unfortunately I don’t find any real information about the technical things. I checked fuses in the engine compartment and in the fuse box (inside next to the steering wheel) and are all OK. My guess is that the control unit is stuck in trailer mode or a relay but to make it short…I don’t know what to do and hope that jmd. can give me a tip/info how to look at the Relay on…finds there and there or which ECU I should change or so Best regards and many thanks already in advance