07 h3 base radio wiring color code questions?

[Happy Hummer]

Hey guys quick question.
Is the pink wire #314 (b3) radio on.............. a acc +12v ?
Is the black wire #2050 (b5) a suitable ground for direct fm module?

Base radio wiring.
No xm.
Chris

 

[f5moab]

No to both. The pink wire is used for a turn on signal from the amp, if the amp is installed; otherwise it is still in the harness but not used. There is no acc or ignition on 12 volt to the radio, only B+. The radio stays hot at all times, and the turn on signal to the radio is supplied by the BCM.

For a ground for the FM module, using a direct ground is the best idea to keep it clean. Under the kick panels at each side are some good ground points.

For ignition on 12 volt the brown wires to the HVAC head unit are from the HVAC relay and are hot in acc and run. (I'm assuming for acc you mean in acc and run!).

 

[Happy Hummer]

Thanks f5moab. I guess I was searching for the connection that would allow for the fm modulator to power on only when if key is turned on but not when h3 is off. Figured avoiding parasitic drain is smart.

Thanks again.

Chris

 

[Happy Hummer]

So it would be hvac... brn 41 (k) also 19 on schematic at fuse box?