I ran the power to the yellow ACC in the harness and grounded it to black in the harness, hooked the rca to the yellow video input RCA. I checked the harness at the camera with a test light and it's getting power. But I still get no picture? The camera is set to "on" and polarity to "battery."

Have I missed anything, or is it likely the actual camera?

The camera rca is supposed to be plugged into the brown "camera" plug. The yellow wire in the avic harness is also constant not accessory.

Thanks.

I didn't see the brown RCA - must be burried - and actually I just assumed that yellow was ACC because the power lead on the XM tuner was yellow. If yellow is BATT, which color in the harness is ACC?

red

Got it working, thanks for the help.

The power lead on your Xm tuner should be tapped off the red wire also.

the xm should be hooked up to constant 12v. not acc

You're right,I stand corrected !