Pinpoint Test A: The Daytime Running Lamps Are Inoperative
WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
- A1 CHECK DRL MODULE OUTPUT
- Key in OFF position.
- Disconnect: DRL Relay.
- Key in ON position.
- Make sure the headlamps and autolamps are in the OFF position and the parking brake is not applied.
- Measure the voltage between ground and DRL relay socket pin 4, circuit 13 (RD/BK).
- Is the voltage greater than 10 volts?
- Yes : CARRY OUT the DRL relay component test. If the relay tests OK, REPAIR circuit 13 (RD/BK) between the DRL relay and the low beam headlamps for an open. TEST the system for normal operation.
- No : GO to A2.
- A2 CHECK CIRCUIT 13 (RD/BK) FOR AN OPEN
- Key in OFF position.
- Disconnect: DRL Module C1030.
- Measure the resistance between DRL module C1030-1, circuit 13 (RD/BK) and DRL relay socket pin 4, circuit 13 (RD/BK).
- Is the resistance less than 5 ohms?
- Yes : GO to A3.
- No : REPAIR circuit 13 (RD/BK) between the DRL relay and the DRL module for an open. TEST the system for normal operation.
- A3 CHECK THE PARKING BRAKE SWITCH SIGNAL CIRCUIT TO THE DRL MODULE FOR SHORT TO GROUND NOTE: Verify the parking brake control is fully released for this step.
- Key in OFF position.
- Disconnect: DRL Module C1030.
- Measure the resistance between DRL module C1030-6, circuit 162 (LG/RD), harness side and ground.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to A4.
- No : REPAIR the circuit. TEST the system for normal operation.
- A4 CHECK VOLTAGE TO THE DRL MODULE
- Measure the voltage between DRL module C1030-2, circuit 434 (LB/BK), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes : GO to A5.
- No : REPAIR the circuit. TEST the system for normal operation.
- A5 CHECK IGNITION SENSE INPUT
- Key in ON position.
- Measure the voltage between DRL module C1030-3, circuit 932 (GY/WH), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes : GO to A6.
- No : REPAIR the circuit. TEST the system for normal operation.
- A6 CHECK THE DRL MODULE GROUND - CIRCUIT 1203 (BK/LB)
- Measure the resistance between DRL module C1030-4, circuit 1203 (BK/LB), harness side and ground.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new DRL module. REFER to DAYTIME RUNNING LAMPS (DRL) MODULE . TEST the system for normal operation.
- No : REPAIR the circuit. TEST the system for normal operation.