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Old 02-25-2018, 01:29 PM
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Need help troubleshooting a problem

Ill try to keep this as short as possible but I have ran onto a problem with an Alpine install. About 2 years ago I started messing with the sound system in my 2013 JK. I purchased Polk speakers all around and a small plug and play Alpine amp. I cut and spliced the factory harness to wire the amp in. I had problem after problem with this set up so I scrapped it all together and picked up the Alpine PSS20 WRA. Spent the weekend getting it all installed. I had to piece the factory harness back together and am fairly confident I got all the speaker wires back together right. I hooked the radio back up and all the speakers were working correctly as of Friday evening. Yesterday I pulled the passenger's seat out and installed the amp and powered sub. Plugged in the supplied "plug and play" wiring harness and reconnected the radio. When I turned everything on the amp and sub seem to be working but I have ZERO sound coming from the front left speaker. I hooked everything up on the amp end the way the instructions said. I have checked and re-checked all connections. Still nothing from the front left. When I removed the wiring harness and went back to "stock" the speaker was back.

Any thoughts on what may be the issue? It should be notes for transparency purposes that when I installed the Polks, I cut the factory plugs off and soldered the wires to each speaker. That being said I think I have the polarity right on each speaker but I guess theres a chance its not? How would that affect the speakers if I have the +/- mixed up?

Any advice would be greatly appreciated.

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Old 03-02-2018, 08:50 PM   #2
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Either a problem in the wiring or the AMP. If you have a multi meter then check the to see if you have an input volt to the amp. If no voltage then you have a wiring issue from the h/u to the amp. If it is present them check the output voltage. If no voltage then you have a bad amp. If a voltage is present the wiring between the amp and speaker.
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