if I buy the adapter plug shown in the pic and do NOT wire the two small power wires just plug into the harness and then run an audio extension cable to a lower end Garmin audio out jack will it work via the CB/Comm System? \
I am assuming the red and black wires on the back of the plug are to get power to the Garmin only. so I don't need to connect the red and black wires if i power my Garmin direct from the battery fused connection....
I assume this part posted by someone else on another thread:
P8 GPS Adaptor Harness 710 002 182 ($65.00)
is just the Purple Plug with the audio male jack pigtail shown below is all I need: