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DroppedIt
02-15-2016, 12:19 PM
I picked up an emgo box taillight the other day. Its got 2 black wires running out. Looking to splice it into an 02 883 harness, how do you test wiring on it to locate ground and hot? I have a wire tester but im electrically retarded. Also its supposedly running and brake light so im thinking it could be grounded in the case and each of the leads are hot maybe one for running one for brake? Can someone clue me in?

sixtysohtree
02-16-2016, 11:31 AM
I would think the body is the ground, 1 wire running other brake light.

cggorman
02-16-2016, 12:10 PM
I would think the body is the ground, 1 wire running other brake light.

I agree. Clip on a couple test leads to a 12v source (I like computer power supplies for this kind of thing. I have several spares laying around). NEG to the case and POS to one of the wires. Note brightness. Switch POS to the other wire. Note brightness. The brighter of the two will be your brake.