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      05-28-2009, 07:47 AM   #10
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Drives: 2015 320i
Join Date: Apr 2005
Location: Ft Lauderdale, Florida

iTrader: (18)

The OEM remote works in turning on an aftermarket amp, however some aftermarket amps require a more powerful remote turn on than what the OEM can provide. This is true also when several aftermarket devices need to be turned on by that single OEM wire.

The solution for all these cases is to use a 12V relay with the OEM remote wire:

Using a relay protects your OEM wire and provides more than enough power to turn on multiple aftermarket devices. A 1A fuse on each aftermarket device remote port is also strongly recommended.