Pinpoint Test B: The Daytime Running Lamps Are On With The Parking Brake Set
WARNING: This page is about a different car, the 2005 Ford Pickup, 2005 Ford F550 Super Duty, 2005 Ford F450 Super Duty, and 2005 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- B1 CHECK THE DRL PARKING BRAKE RELAY CIRCUIT
- Key in ON position.
- Disconnect: DRL Parking Brake Relay (No. 1).
- Do the DRL continue to illuminate?
- Yes : GO to B3.
- No : GO to B2.
- B2 CHECK CIRCUIT 162 (LG/RD) FOR AN OPEN
- Key in OFF position.
- Measure the resistance from the DRL parking brake relay pin 2, circuit 162 (LG/RD), harness side and ground.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new DRL parking brake relay. TEST the system for normal operation.
- No : REPAIR the circuit. TEST the system for normal operation.
- B3 CHECK CIRCUIT 175 (BK/YE) FOR A SHORT TO POWER
- Disconnect: DRL Relay No. 2.
- Do the DRL continue to illuminate?
- Yes : GO to B4.
- No : REPAIR the circuit. TEST the system for normal operation.
- B4 CHECK CIRCUIT 13 (RD/BK) FOR A SHORT TO POWER
- Disconnect: DRL Relay No. 3.
- Do the DRL continue to illuminate?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No : GO to B5.
- B5 CHECK CIRCUIT 1032 (WH/BK) FOR A SHORT TO POWER
- Carry out the relay component test for the DRL relay No. 3. Refer to COMPONENT TESTING - F250-F550 SUPER DUTY PICKUP for component testing.
- Is the DRL relay No. 3 OK?
- Yes : REPAIR the circuit. TEST the system for normal operation.
- No INSTALL a new DRL relay No. 3. TEST the system for normal operation.