Grand Cherokee 2WD L6-4.0L VIN S (1997)
Brake Lamp Relay: Locations
TRAILER TOW FACTORY INSTALLED CIRCUIT OPERATION
Circuit A25O from fuse 11 in the Power Distribution Center (PDC) supplies voltage to circuit F70 through fuse 8 in the junction block. Circuit
F70 supplies battery voltage for the trailer tow circuit breaker and the contact side of the stop lamp relay. The trailor tow circuit breaker is taped to
the trailer tow harness located in the LEFT REAR QUARTER PANEL.
When the operator presses the brake pedal, voltage flows through the coil of the relay to ground causing the contacts in the relay to connect
circuits F70 and 95.
Circuit 95 connects to the left and right turn signal relay. Voltage flows through the closed contacts in the relay to the trailer tow connector.
