Radio Circuit Operation

CIRCUIT OPERATION
There are four audio systems offered on this vehicle. The base systems use four speakers. The optional systems have eight speakers, power amplifiers at the speakers, name brand speaker relay, and a [1][2]radio choke.

All of the audio systems are powered by a 10 Amp fuse located in cavity 8 of the junction block on circuit X12. This fuse is HOT when the ignition switch is in the ACCESSORY or RUN position.

Circuit A31 supplies power to fuse 11. The A31 circuit, which receives it's power from the ignition switch, on circuit A1, is protected by a 40 Amp fuse located in cavity 5 of the Power Distribution Center (PDC).

Both the standard and optional radios use an external case ground. This case ground attaches to the rear of the radio.