Kenwood DMX7017DABS car monitor/radio etc

[Diabolical Artificer]

AFAIK car audio needs three basic connections - ground & positive Vcc and to turn on a remote connection. I think the remote is either grounded or +12v, see here - https://www.instructables.com/Basics-of-...ubwoofers/ B Remote wire..... To make sure before applying +12v to the remote wire just buzz the remote wire out with your DMM on diode/continuity check the other probe to ground connection.