Throttle Full Close Switch: Description and Operation

CIRCUIT OPERATION
On Police Package vehicles, an optional extended idle switch provides an input to the Powertrain Control Module (PCM) on circuit K78. Circuit K78 connects to cavity A12 of the PCM. When the ignition switch is in the RUN position, circuit F15 from fuse 25 in the junction block supplies battery voltage to the extended idle switch. Circuit Z1 grounds the switch.