Needing help with radio. Have 2004 mazda 6 tried to do my own aux mod didn't turn out now I don't have any sound but beeps and cd player won't register with oem. So I hooked up an aftermarket stereo and have it spliced into stock harness with a switch to main power so the stock don't come on...
Or you can splice into the acc. wire or the battery wire run it to a switch and ground the switch and back to the other end of the wire then you can turn it on and off.
