Question about Car Audio & Video
It's possible that the 12V constant wire is either not connected properly or there's no voltage present when the vehicle is turned off. You'll have to check your installation manual for the unit, I can't look it up without a make and model number. But usually, the 12V constant wire is "yellow". If you're using an aftermarket wiring harness, make sure it's connecting to the correct wire in the vehicle wire bundle, and that there's 12V present when the ignition is turned off.
If this checks out OK, the unit itself is probably defective.
Hope this helps.
Posted on Jul 24, 2009
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Posted on Jan 02, 2017
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