Amp not powering up with aftermarket head unit
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2004 LS 430 without navigation. Trying to install new head unit. The Mark Levinson amp will not power up with new unit.
If I plug up factory head and leave the key on, I can disconnect the factory unit while playing and hook up the aftermarket head and it plays fine until I turn off the key. The aftermarket unit will power up fine when you cycle
the key but no amp.
I am using a factory harness from Crutchfield. We have tried two different but identical heads and two different wiring harnesses. Any ideas.
I don’t think there is any trigger voltage getting back to the amp but I am not sure how to verify at the amp.
If I plug up factory head and leave the key on, I can disconnect the factory unit while playing and hook up the aftermarket head and it plays fine until I turn off the key. The aftermarket unit will power up fine when you cycle
the key but no amp.
I am using a factory harness from Crutchfield. We have tried two different but identical heads and two different wiring harnesses. Any ideas.
I don’t think there is any trigger voltage getting back to the amp but I am not sure how to verify at the amp.
Last edited by Rrobison; 03-16-18 at 03:33 PM. Reason: Misspelling
#2
Lexus Champion
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2004 LS 430 without navigation. Trying to install new head unit. The Mark Levinson amp will not power up with new unit.
If I plug up factory head and leave the key on, I can disconnect the factory unit while playing and hook up the aftermarket head and it plays fine until I turn off the key. They aftermarket unit will power up fine when you cycle
the key but no amp.
I am using a factory harness from Crutchfield. We have tried two different but identical heads and two different wiring harnesses. Any ideas.
I don’t think there is any trigger voltage getting back to the amp but I am not sure how to verify at the amp.
If I plug up factory head and leave the key on, I can disconnect the factory unit while playing and hook up the aftermarket head and it plays fine until I turn off the key. They aftermarket unit will power up fine when you cycle
the key but no amp.
I am using a factory harness from Crutchfield. We have tried two different but identical heads and two different wiring harnesses. Any ideas.
I don’t think there is any trigger voltage getting back to the amp but I am not sure how to verify at the amp.
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Thank you rkw77080. I may not be looking in the right place, should the diagram be an attachment to your reply?
Oh I do see it there now thank you!
Rusty
Oh I do see it there now thank you!
Rusty
Last edited by Rrobison; 03-16-18 at 03:48 PM. Reason: I now see it
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CVBigRig
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03-16-14 05:43 PM