Dodge Durango (HB). Manual — part 289
For the Horn System circuit diagram (Refer to 8 - ELECTRICAL/HORN SYSTEM - SCHEMATICS AND DIA-
GRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Continuously
•
Set Condition:
When the Front Control Module does not detect voltage on the Horn Relay Control circuit.
Possible Causes
HORN FUSE
B(+) OPEN
RELAY
POWER DISTRIBUTION CENTER
FRONT CONTROL MODULE
Diagnostic Test
1.
TEST FOR INTERMITTENT CONDITION
With the scan tool, record and erase DTC’s
Operate the Horn Switch several times.
Cycle the ignition from on to off 3 times and leave on.
With the scan tool, read DTC’s.
Does the scan tool display the same DTC?
Yes
>> Go To 2
No
>> The conditions that caused this code to set are not
present at this time. Using the wiring diagram/schematic
as a guide, inspect the wiring and connectors.
Perform BODY VERIFICATION TEST - VER 1.
2.
HORN FUSE
Using a 12-volt test light connected to ground, check the Horn fuse.
Does the test light illuminate and was the fuse OK?
No
>> Replace the horn fuse if open and check for a short to
ground on the Horn Relay Output circuit or correct the
open B(+) circuit to the fuse.
Perform BODY VERIFICATION TEST - VER 1.
Yes
>> Go To 3
HB
HORN SYSTEM - ELECTRICAL DIAGNOSTICS
8H - 3
B2336,B2338–HORN CONTROL CIRCUIT LOW/OPEN – FCM —
(CONTINUED)
3.
OPEN FUSED B(+) TO RELAY
Remove the Horn Relay from the PDC.
Using a 12-volt test light connected to ground, check the Fused B(+)
circuit at the relay connector.
Does the test light illuminate?
No
>> Replace the Power Distribution Center.
Perform BODY VERIFICATION TEST - VER 1.
Yes
>> Go To 4
4.
HORN RELAY
Install a known good relay in place of the Horn Relay.
With the scan tool erase DTC’s
Operate the Horn Switch several times.
Cycle the ignition from on to off 3 times and leave on.
With the scan tool, read DTC’s.
Does the scan tool display the same DTC?
No
>> Replace the original Horn Relay.
Perform BODY VERIFICATION TEST - VER 1.
Yes
>> Go To 5
5.
(X4) HORN RELAY CONTROL SHORTED
Remove the Horn Relay.
Disconnect the Front Control Module from the PDC 49 – way connec-
tor.
Measure the resistance between ground and the (X4) Horn Relay
Control circuit at the relay.
Is the resistance below 1000.0 ohms?
Yes
>> Replace the Power Distribution Center.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 6
8H - 4
HORN SYSTEM - ELECTRICAL DIAGNOSTICS
HB
B2336,B2338–HORN CONTROL CIRCUIT LOW/OPEN – FCM —
(CONTINUED)
6.
(X4)HORN RELAY CONTROL OPEN
Measure the resistance of the (X4)Horn Relay Control circuit from the
relay connector to FCM connector.
Is the resistance below 3.0 ohms?
Yes
>> Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Power Distribution Center.
Perform BODY VERIFICATION TEST - VER 1.
HB
HORN SYSTEM - ELECTRICAL DIAGNOSTICS
8H - 5
B2336,B2338–HORN CONTROL CIRCUIT LOW/OPEN – FCM —
(CONTINUED)
8H - 6
HORN SYSTEM - ELECTRICAL DIAGNOSTICS
HB
B2337–HORN CONTROL CIRCUIT HIGH – FCM
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