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Message: <blockquote data-quote="Mike465" data-source="post: 5204487" data-attributes="member: 598854"><p>What you need to do is unplug the HU from the wiring harness. Then measure the resistance at the radio harness of each speaker. If you don't get a reading then try meatering it behind the factory harness. If you get a reading behind the factory harness then you have bad connection or the smart harness(if you used one) has come unpined. If you can meater all 4 speakers at the radio harness then the internal amp on the HU is bad. Now if you dont meater the speakers on the radio harness or behind the factory harness then you have a short some where.</p></blockquote><p></p>

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