Pinpoint Test B: The Daytime Running Lamps Are On With The Parking Brake Set

B1 CHECK THE PARKING BRAKE SWITCH
- Key in OFF position.
- Disconnect: Parking Brake Switch C306.
- Connect a 10A fused jumper wire between parking brake switch C306, Circuit 22 (LB/BK), harness side and ground.
  
  Fig 1: Checking Parking Brake Switch
  Courtesy of FORD MOTOR CO.
- Key in ON position.
- Do the DRL turn off?
1. Yes: INSTALL a new parking brake signal switch and bracket. TEST the system for normal operation.
2. No: GO to B2.
B2 CHECK THE PARKING BRAKE SWITCH SIGNAL CIRCUIT
- Key in OFF position.
- Disconnect: DRL Module C1030.
- Measure the resistance between parking brake switch C306, Circuit 22 (LB/BK), harness side and DRL module C1030 Pin 6, Circuit 22 (LB/BK), harness side.
  
  Fig 2: Checking Parking Brake Switch Signal Circuit
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
1. Yes: INSTALL a new DRL module. REFER to MODULE-DAYTIME RUNNING LAMPS (DRL) . TEST the system for normal operation.
2. No: REPAIR the circuit. TEST the system for normal operation.