BMW original radio harness to RCA

Aftermarket Radio MUST have Pre-Amp outputs for both front and rear speakers

Blue wire – connect to REMOTE wire output of aftermarket radio.

May require PACSNI-1 to boost signal. Eliminates amp turn on noise and/or limited audio output.

May require STSGN21 to eliminate amplifier ‘pop’ and delays amplifier turn on by 1 second.