Head Unit-no power

[Darkstar]

the yellow wire wire should be hooked up to constant 12v the red wire needs to be 12v switched. and it looks like you have the yellow going to the dimmer wiring....

Instructions say that the yellow plug is the constant.

 

[TODoubleD]

if you have a multi-meter or a volt meter check it out

 

[TODoubleD]

this should be the car wiring.
Radio Constant 12V+ Wire: Orange
Radio Ignition Switched 12V+ Wire: Yellow
Radio Ground Wire: Black
Radio Illumination Dimmer Wire: Gray
Radio Antenna Trigger Wire: Pink
Left Front Speaker Wire (+): Tan
Left Front Speaker Wire (-): Gray
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Dark Green
Left Rear Speaker Wire (+): Brown
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Dark Blue
Right Rear Speaker Wire (-): Light Blue

and this should be the radio side
Memory (+12v Constant) Yellow
Ignition (+12v Switched) Red
Ground (-) Black
Dimmer Pink/White (Alpine only)
Power Antenna Blue
Amplifier Turn-on Blue/White
Phone Mute Light Blue (Sony only)
S p e a k e r s
Right Front (+) Gray
Right Front (-) Gray/Black
Left Front (+) White
Left Front (-) White/Black
Right Rear (+) Violet
Right Rear (-) Violet/Black
Left Rear (+) Green
Left Rear (-) Green/Black

 

[Darkstar]

Ok, I tried putting both the red and yellow wires to the red wire on the adapter and the head unit came on, tried it on the adapter's yellow wire and I got nothing.

 

[Darkstar]

The car's plug that is orange has two wires that is orange and brown, it plugs into the adapter's yellow which had no power.

 

[TODoubleD]

humor me for a few minutes and turn your headlights on and put the dimmer switch all the way up..

 

[Darkstar]

nothing

 

[pontiacgp]

I'd put a fuse in the yellow wire and find a good constant 12 v source. Mine runs to the battery. If it still doesn't work then I'd put a fuse in the red wire and find a good 12 v ignition on source.

 

[Darkstar]

I might try that. I just don't understand why the original radio would power on but the new one won't.

 

[pontiacgp]

just like TODoubleD said, the old radio was powered by the switched 12v. The new radio is powered by the yellow. The switched 12v just turns it on and off.