Speaker wire polarity test?


Unregistered guest
Is there any way to test the polarity of speaker wires from the HU? car came with two speakers but is wired for four. Want to add two more but can't tell + or - on the stock wire harness. Dealer can't help and wiring diagram is not yet available. Can you hook up a VOM and watch the needle sweep to figure out or will that damage HU? I've put in new speakers and there is no bass response (might be out of phase)

Bronze Member
Username: Kojak28

Augusta, GA USA

Post Number: 97
Registered: Feb-05
Are the speakers amped?

Silver Member
Username: Blownriv


Post Number: 141
Registered: Nov-04
Wire one of the speakers in reverse to see if the bass response improves.

New member
Username: Cavey

Post Number: 2
Registered: Mar-05
i have a 97 cavalier that has 350 watt speakers in the front and 650 watts in the rear including two 12 inch 600 watts and a 2 channel 1400 watt amp and when i turn up the volume the radio shuts off what could be causing this problem. the only speakers connected to the amp is the 12's

Silver Member
Username: Byrumjr

Post Number: 126
Registered: Jan-05
What kind of car do you have? I might be able to find the wiring.
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