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Discussion Starter · #1 ·
Should you have a car with one of these, or similar, what voltage would you use to test it if it's not working? Also, what is the correct name for these units?

And if your's looks awfully similar to this one, what two (of four) contacts are the + and -?

I will add that when I (temporally) knew the correct name, I found a video for testing and the fellow used a small 9V battery on two different units. I just got through trying to get it to run with the same type of 9V battery with no success.

I just bought this one, so didn't remove it from a car. Had I, I would have cut the wires to the socket/plug and bought them together. I'd assume the wires are red and black for the power section.


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