Hey I have an issue with my wife's system, all the wires are hooked up correctly but the amp will not turn on... and I tried a different amp and nothing happened.... changed the ground wire nothing I don't know whats going on...
If it's not turning on you only have three places to look. Power, ground and remote. Grab a volt meter and check that power always has 12V, and remote has 12V when the deck is on.
it's most likely ground or power... remember that you need to ground to SANDED metal only... paint is an isulator to current