Parking Lamp: Description and Operation
CIRCUIT OPERATIONWhen the operator turns the parking lamps ON, a ground path is completed on circuit L308 from the Body Control Module (BCM), through the CLOSED contacts in the headlamp switch to ground on circuit Z1.
Voltage for the L308 circuit is supplied from the BCM.
The BCM interprets the operators request and supplies a ground path for circuit L97. This circuit connects from the BCM to the coil side of the park lamp relay, located in the junction block.
Ground to the coil side of the relay causes the contacts in the relay to CLOSE connecting circuits A6 and L7. Circuit L7 supplies power to fuses 4 and 6. Circuit A6 is a direct battery feed, HOT at all times, and protected by a 40 Amp fuse located in cavity 6 of the Power Distribution Center (PDC).
Circuit L77 connects from fuse 6, a 15 Amp, to the left front park/turn signal lamp. Ground for the lamp is supplied on circuit Z1 and terminates at the left cowl panel.
Circuit L78 connects from fuse 4, a 15 Amp, to the right front park/turn signal lamp. Ground for the lamp is supplied on circuit Z1 and terminates at the right cowl panel.
Circuit L78 is spliced internal to the junction block and supplied power to fuse 1, a 10 Amp.