[jpc763]

Originally Posted by dghii

The blue wire on red plug is the amplifer control signal. It is a 12Vdc signal from HU to amp to turn the amp on slight after the HU powers up.
The Pioneer System mute is the same signal, just silly name.

OK, I read the wrong label. The blue wire on the pioneer harness is labeled "System Remote Control". The Yellow Wire with a thin black or blue stripe is labeled Mute.

So does the Pioneer "Mute" wire hook to the blue wire on the red harness?

Thanks for your response. I searched and there are a lot of threads about replacing the head unit but nothing I could find about the wiring harness connections.

Thanks, John