Originally Posted by
pizzaguy
Did you connect the amp enable line?
The amp won't turn on if you don't TURN IT ON!
A5 on the radio supplies 12 volts to power the am/fm preamp and to enable the amplifier. If your after market head does not have this, then connect this to the switched power to the head (Not to battery power, or your car's battery will go dead when it's parked).
Looks as if the Grn/Blu will need attachment to the ACC power source to enable the power amp. I'll give that a try tomorrow morning. Still don't know what the Gray/Blu wire does though. The Gry/Blu wire comes from "Splice Block 200." (Have to research that.)