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Old 06-14-2018, 07:00 AM
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DAVe3283 DAVe3283 is offline
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Join Date: Sep 2009
Location: Boise, ID, USA
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From what I have seen of most radio's protection circuits, if there is a short on any one speaker, ALL speakers are turned off to protect the radio. The interface module could be the problem, and if it isn't, try disconnecting the speakers one at a time as close to the head unit as possible.

Or just take a multimeter and measure the resistance of all the speakers at the connector to the head unit. They should all be the same value, probably 4 or 8 ohms. If one is different from the rest, trace that wiring and see what you find.
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