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Pioneer head unit plays in accesory mode, but not when vehicle is fully started

A buddy of mine recently bought a 93' geo tracker to run around in. the kid he bought it from hooked up an older model pioneer head unit sometime before my friend bought the vehicle. the problem he is having is that the unit gets power, but only produces sound when the key is turned to accessory mode, and no sound when the vehicle is started up. any ideas?

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He tapped into starter wire instead of accessory. Remove radio and verify the switched power (red) wire is properly hooked up to an accessory wire that stays on after vehicle is started.
I believe the wire is white/black behind the radio. Check with a voltmeter to be sure.
http://www.the12volt.com/installbay/stereodetail/967.html
for the wire codes to that vehicle.

Posted on Dec 22, 2008

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Posted on Jan 02, 2017

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Wiring diagram 93 geo tracker


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