Symptom:
HORN RELAY CONTROL CIRCUIT HIGH
When Monitored and Set Condition:
HORN RELAY CONTROL CIRCUIT HIGH
When Monitored: With the ignition ON.
Set Condition: When the Front Control Module detects excessive current on the Horn
Relay Control circuit.
POSSIBLE CAUSES
FRONT CONTROL MODULE
INTEGRATED POWER MODULE
INTERMITTENT DTC
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, record and erase FCM DTC’s.
With the DRBIIIt, actuate the Horn Relay.
With the DRBIIIt, read FCM DTC’s.
Does the DRBIIIt display a HORN RELAY CONTROL CIRCUIT DTC active?
All
Yes → Go To 2
No → Go To 3
2 Turn the ignition off.
Remove the Front Control Module from the Integrated Power Module.
NOTE: Check connectors - Clean/repair as necessary.
Use a fused jumper wire for the next step.
Momentarily jumper the Horn Relay Control circuit to ground at the FCM connector.
Does the Horn sound?
All
Yes → Replace the Front Control Module in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No → Replace the Integrated Power Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Visually inspect the related circuit connectors. Look for broken, bent, pushed out, or
corroded terminals.
Refer to any Hotline letters or Technical Service Bulletins that may apply.
Were any problems found?
All
Yes → Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No → Test Complete.
418
IGNITION, POWER, ACCESSORY
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