Question about Car Audio & Video
Tap into the blue antenna lead on the harness if you have an aftermarket head unit. If not, you can run from the switched ignition power wire on the factory head unit. If you pull the head unit out, it may have a diagram on it telling you which wire does what. There are two power wires - one is constant power to maintain radio presets, clock, etc, and the other one is triggered when you turn the key - that's the one you'd want. If you use constant power, your amp would never shut off, even when the key was out of the ignition. If none of that is feasible, run the wire from the battery to your remote turn-on connection on the amp, but put a switch on it up near the driver's seat, so you can turn the amp on manually.
Posted on Aug 11, 2008
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Posted on Jan 02, 2017
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