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Discussion Starter · #1 ·
bought the alpine unit and the correct harness adapter. Installed everything but unit won't turn on.
Checked power and ground at original harness, at adapter harness and alpine... all read about 12.5... fuses under the hood are fine.
But the unit doesn't power up... what am I missing?

Are there fuses inside the head unit? I know I'll void the warranty if I start poking around in there... just wondering if you know if there are fuses inside?

Thanks
 

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You said "correct harness adapter" What does that mean?

After market head units have a "trigger wire" (usually a red wire) which triggers the unit on (it requires 12 volts in accessory or run). Meanwhile, the jeep harness does not have a red trigger wire because they are triggered on via Can Bus.... so where are you getting your trigger power from?
 
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