The amp needs to see the radio turn on so the amp does the same. Does the new radio have a blue wire for the antenna? This is what most people use to trigger the amp. Here is a wiring diagram so you can get it connected correctly:
I believe it is the serial port they hook it up to.
Please let us know what happens so it will help others.
Cheers, Ken
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Wednesday, March 31st, 2021 AT 5:38 PM