Installed a Pioneer head unit in my car, works great just the head unit doesn't switch on when i switch on the car...i have to turn it on 'manually' and it loses all its saved settings. Remote cable is connected to the the pin where the last head unit's remote cable was. Also tried other pins but can't get it to work. What might i be doing wrong?
Its definitely a wiring issue. Usually you have your switched power and 12+ mixed up or partially wired. it sounds as though your constant wire is wired incorrectly.
No, Figure out which one is correct. Make sure you have them both wired correctly. the 12v+ should be wired to a constant source and is yellow. The red is a switched source and should be wired to something that switches on with the ignition.