RW, if you are still looking for an answer let me know and I will take a look at mine tomorrow as it was wired very similarly. I think you may be missing a wire, maybe it is still in the wall. If am pretty sure the green was the positive but I thought there was a white wire as the ground. The purple wire is not connected to anything. Keep in mind these wires are part of the running lamps and will only be hot while plugged into the tow vehicle with the parking lamps on.
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2020 F250 STX/FX4 CCSB 7.3/3.55
2020 Jayco Jay Flight 284BHS
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