I have a jvc head unit in my 86 gti, I don't know which wires are possitive or negative. I made all the connections, things sound fine, but I would like to know how to test for the right connections?
take a AA battery and touch the ends of the speaker wires to it while watching the speaker. if it moves outward when the connection is made, then thats the correct polarity. if it moves inward, then reverse the leads.
Put a DMM on the wires, The one that has conntnuity to ground is the Neg. Or get the wiring specs. Theres help in the other forum for that. If its for the speakers, do what Brandon said.
it won't really matter as long as both are wired the same way. Its polarity...just don't have one set wired normal and the other one backwards. If its a component set its best to try them both in phase and out of phase to see which way is the best.
hey when i wired a radio in my truck ijustwent to googleand typed in harnessinfor for myvehicle and there wasa site that toldme what was whatso ? that iswhat i would do