Raido "On" Wire/power antenna
reason is, i turn the radio off and the amp light stays on? I would assume it would power off no? It's an alpine mrp-m350
use a VOM to check it and see if its staying on because of this
Ive seen some amps stay on with less voltage so perhaps its picking some up
somewhere.
I have a similar amp( F 306) and it shuts down about a minute later.
The orange wire in the factory harness is constant (battery) power so your amp will be on all the time.
Assuming you used a wiring harness adapter to install your aftermarket head unit, the correct wire in the adapter harness is labeled and is blue/white if your HU has a separate amp turn-on wire or solid blue if you must rely on the power antenna signal wire.
If you didn't use a harness adapter and butchered the factory wiring instead, the pink wire in the factory harness is the power antenna wire - there is no remote turn-on wire in the factory system.







