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I'm pretty sure you do the pioner that way. Touch thenpark brake wire to ground then take off then touch it back and hold it there see if that works

Sometimes on the ground wire has to be switched, like ground unground ground. Check the instructions on it. When I worked in the audio shop we would mount a tiny toggle switch that was out of sight...

Prob has a Boise radio system which is amped. So you will have to run the amp turn on off the radio to the amp turn on on the vehicle. If you bought adapter plug it should have it. They will both be...