Symptom:
LOW BEAM RELAY COIL SHORT TO VOLTAGE
POSSIBLE CAUSES
INTERMITTENT CONDITION
HEADLAMP RELAY
HEADLAMP RELAY CONTROL CIRCUIT
BODY CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear the current Body Control Module DTC’s.
Turn the ignition off, wait 10 seconds then turn the ignition on.
Turn the Low Beams ON.
With the DRBIIIt, read the current Body Control Module DTC’s.
Does the DRBIIIt display: Low Beam Relay Coil Shorted to Voltage?
All
Yes → Go To 2
No → The condition that caused this symptom is currently not present.
Inspect the related wiring harness for a possible intermittent
condition.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
Remove the Headlamp Relay from the Power Distribution Center.
Substitute the original Headlamp Relay with a known good relay.
Turn the ignition on.
With the DRBIIIt, clear the current Body Control Module DTCs.
Turn the ignition off, wait 10 seconds, then turn the ignition on.
Turn the Low Beam Headlamps ON.
With the DRBIIIt, read the current Body Control Module DTC’s.
Does the DRBIIIt display: Low Beam Relay Coil Shorted to Voltage?
All
Yes → Go To 3
No → Replace the original Headlamp Relay.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Disconnect the Body Control Module C2 connector.
Remove the Headlamp Relay from the Power Distribution Center.
Turn the ignition On.
Measure the voltage of the Headlamp Relay Control circuit at the relay.
Is the voltage above 10.0 volts?
All
Yes → Repair the Headlamp Relay Control circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
No → Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
193
EXTERIOR LIGHTING
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