Pinpoint Test I: The Parking Lamps Are Inoperative With Autolamps On

WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

I1 CHECK THE PARKING LAMP OPERATION
- Key in OFF position.
- Place the headlamp switch in the parking lamps ON position.
- Are the parking lamps illuminated?
Yes

TURN the headlamp switch OFF. GO to 12.

No

REFER to PARKING, REAR AND LICENSE LAMPS to continue diagnosis of the parking lamps.
I2 CHECK CIRCUIT 14 (BN) FOR AN OPEN
- Disconnect: Vehicle Security Module C3203e.
- Place the headlamp switch in the parking lamps ON position.
- Measure the voltage between the vehicle security module C3203e-2, circuit 14 (BN), harness side and ground.
  
  Fig 1: Checking Circuit 14 (BN) For An Open
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes

TURN the headlamp switch OFF. GO to 13.

No

REPAIR the circuit. TEST the system for normal operation.
I3 CHECK CIRCUIT 195 (TN/WH) FOR POWER
- Measure the voltage between the vehicle security module C3203e-8, circuit 195 (TN/WH), harness side and ground.
- Is the voltage greater than 10 volts?
Fig 2: Checking Circuit 195 (TN/WH) For Power
Courtesy of FORD MOTOR CO.

Yes

GO to I4.

No

REPAIR the circuit. TEST the system for normal operation.

I4 CHECK FOR VEHICLE SECURITY MODULE OPERATION
- Disconnect all the vehicle security module connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the vehicle security module connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes

INSTALL a new vehicle security module. Refer to VEHICLE SECURITY MODULE .

TEST the system for normal operation.

No

The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.