Dodge Ram 2004 Service Manual page 438

IGNITION, POWER, ACCESSORY
*HORNS INOPERATIVE —
TEST
9 Disconnect the Horn connector.
Using a 12-volt test light connected to 12-volts, check the Ground circuit in the horn
connector.
Does the test light illuminate brightly?
Yes → Replace the Horns.
No
10 Gain access to the IPM C1 connector.
Using a 12-volt test light connected to ground, back probe the Horn Relay Output
circuit in the IPM C1 connector.
With the DRBIII , the actuate the horn relay.
Does the test light illuminate brightly?
Yes → Repair the Horn Relay Output circuit for an open.
No
11 Turn the ignition off.
Remove the Front Control Module from the Integrated Power Module.
NOTE: Check connectors - Clean/repair as necessary.
NOTE: The test light is still connected to the C1 connector.
Momentarily jumper the Horn Relay Control circuit to ground at the FCM connector.
Does the test light illuminate brightly?
Yes → Replace the Front Control Module in accordance with the Service
No
Continued
ACTION
Perform BODY VERIFICATION TEST - VER 1.
→ Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
→ Go To 11
Information.
Perform BODY VERIFICATION TEST - VER 1.
→ Replace the Integrated Power Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
424
APPLICABILITY
All
All
All