Grand Cherokee 2WD L6-4.0L VIN S (1997)
Key Cylinder Lamp: Description and Operation
CIRCUIT OPERATION
When the courtesy lamp switch closes, it connects circuit M11 from the Body Control Module to ground on circuit Z1. In response to the courtesy
lamp signal, the BCM energizes the courtesy lamp relay by grounding the relay coil on circuit M112. When the relay energizes, it connects circuit
M2 to ground on circuit Z1. Circuit M2 provides ground for the right and left courtesy lamps, dome/reading lamps, key-in halo lamp and cargo
lamp.
Circuit A7 from fuse 15 in the Power Distribution Center (PDC) powers circuit M1 through fuse 16 in the junction block. Circuit M1 powers the
right and left courtesy lamps, ignition switch key-in halo lamp, and cargo lamp. Circuit M1 also powers the glove box lamp and underhood lamp.
