Pinpoint Test O: The High Beam Indicator Is Never On
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.
- O1 VERIFY HIGH BEAM OPERATION
- Verify the high beam headlamps operation.
- Do the high beam headlamps operate correctly?
- Yes : GO to O2.
- No : REFER to EXTERIOR LIGHTING to continue diagnosis of the high beam headlamps.
- O2 CHECK CIRCUIT 12 (LG/BK) FOR VOLTAGE
- Disconnect: Instrument Cluster C220a.
- Place the multifunction switch in the high beam position.
- Measure the voltage between the instrument cluster C220a-2, circuit 12 (LG/BK), harness side and ground.
- Is the voltage greater than 10 volts?
NOTE: Headlamps must be on for this test.- Yes : GO to O3.
- No : REPAIR the circuit. TEST the system for normal operation.
- O3 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Measure the resistance between the instrument cluster C220a-10, circuit 57 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
- Yes : GO to O4.
- No : REPAIR the circuit. TEST the system for normal operation.
- O4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
- Disconnect all the instrument cluster connectors.
- Check for:
- corrosion
- pushed-out pins
- Connect all the instrument cluster 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 instrument cluster. REFER to INSTRUMENT CLUSTER . 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.