If I was swapping harness and the new one had the cut dome light wires cut, I'd be tempted to use the 'old' dome light circuit.
The only hesitation I'd have is if the cable wrap has to come off. Someone who has done it a few times might be less hesitant on that.
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Violet could be reverse lights. Maybe it was hacked because it was a column switch with a broken pin.
I'd probably treat all the old crimps and terminals with Deoxit 5 if they look good and 100 if not so good. 100 has to be wiped off. That's what I'm doing - old toothbrush will be for scrubbing. Cans are a little pricey but the small tubes are like 5 USD.
