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Horn System - Electrical Diagnostics: Other Dodge Durango II

Horns 10 illustrations ~1028 words

Monitor Conditions

  1. When Monitored: Continuously

Set Conditions

  1. Set Condition: When the Front Control Module does not detect voltage on the Horn Relay Control circuit.

Possible Causes

Possible Causes

  1. HORN FUSE
  2. B(+) OPEN
  3. RELAY
  4. POWER DISTRIBUTION CENTER
  5. FRONT CONTROL MODULE

Scheme 3

Scheme 3: Diagnostic Test
Scheme 3: Diagnostic Test

Scheme 4

Scheme 4
Scheme 4

Scheme 5

Scheme 5
Scheme 5

Scheme 6

Scheme 6
Scheme 6
  1. 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»(ref-212785-S21580174282005122700000) .
  2. 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
  3. 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»(ref-212785-S21580174282005122700000) . Yes : Go To 3
  4. 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»(ref-212785-S21580174282005122700000) . Yes : Go To 4
  5. 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»(ref-212785-S21580174282005122700000) . Yes : Go To 5
  6. (X4) HORN RELAY CONTROL SHORTED Remove the Horn Relay. Disconnect the Front Control Module from the PDC 49 - way connector. 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»(ref-212785-S21580174282005122700000) . No : Go To 6
  7. (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»(ref-212785-S21580174282005122700000) . No : Replace the Power Distribution Center. Perform «BODY VERIFICATION TEST - VER 1»(ref-212785-S21580174282005122700000) .

Scheme 7

Scheme 7: Circuit Schematic
Scheme 7: Circuit Schematic
  1. When Monitored: Continuously
  1. Set Condition: When the Front Control Module detects a short to battery on the Horn Relay Control circuit.

Possible Causes

  1. HORN RELAY
  2. POWER DISTRIBUTION CENTER
  3. FRONT CONTROL MODULE

Scheme 8

Scheme 8: Diagnostic Test
Scheme 8: Diagnostic Test

Scheme 9

Scheme 9
Scheme 9
  1. 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»(ref-212785-S21580174282005122700000) .
  2. 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 B2337 - HORN CONTROL CIRCUIT HIGH? Yes : Go To 2
  3. HORN RELAY Turn the ignition off. 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 B2337 - HORN CONTROL CIRCUIT HIGH? No : Replace the original Horn Relay. Perform «BODY VERIFICATION TEST - VER 1»(ref-212785-S21580174282005122700000) . Yes : Go To 3
  4. SHORTED POWER DISTRIBUTION CENTER Remove the Horn Relay. Disconnect the Front Control Module from the PDC 49 - way connector. Turn the ignition on. Measure the voltage between (X4) Horn Relay Control circuit and ground. Is there any voltage present? Yes : Replace the Power Distribution Center. Perform «BODY VERIFICATION TEST - VER 1»(ref-212785-S21580174282005122700000) . No : Replace the Front Control Module. Perform «BODY VERIFICATION TEST - VER 1»(ref-212785-S21580174282005122700000) .

Scheme 10

Scheme 10: Circuit Schematic
Scheme 10: Circuit Schematic
  1. When Monitored: Continuously
  1. Set Condition: When the Cluster senses the Horn Switch input for over 30 seconds, this code will set.

Possible Causes

  1. HORN SWITCH
  2. CLOCKSPRING
  3. (X3)HORN SWITCH SENSE CIRCUIT SHORTED TO GROUND
  4. INSTRUMENT CLUSTER

Scheme 11

Scheme 11: Diagnostic Test
Scheme 11: Diagnostic Test

Scheme 12

Scheme 12
Scheme 12
  1. 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»(ref-212785-S21580174282005122700000) .
  2. 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. Turn the ignition on. With the scan tool, read DTC's. Does the scan tool display HORN SWITCH STUCK? Yes : Go To 2
  3. (X3)HORN SWITCH SENSE SHORTED Turn the ignition off. Disconnect the Cluster C1 connector. Measure the resistance between ground and the (X3) Horn Switch Sense circuit. Is the resistance below 1000.0 ohms? No : Replace the Cluster. Perform «BODY VERIFICATION TEST - VER 1»(ref-212785-S21580174282005122700000) . Yes : Go To 3
  4. HORN SWITCH SHORTED WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding. Disconnect the Horn switch connector. Measure the resistance between ground and the (X3) Horn Switch Sense circuit. Is the resistance below 1000.0 ohms? Yes : Go To 4 Perform «BODY VERIFICATION TEST - VER 1»(ref-212785-S21580174282005122700000) . No : Replace the Horn Switch. Perform «BODY VERIFICATION TEST - VER 1»(ref-212785-S21580174282005122700000) .
  5. CLOCKSPRING SHORTED Disconnect the Clockspring C1 connector. Measure the resistance between ground and the (X3) Horn Switch Sense circuit. Is the resistance below 1000.0 ohms? Yes : Repair the Horn Switch Sense circuit for a short to ground. Perform «BODY VERIFICATION TEST - VER 1»(ref-212785-S21580174282005122700000) . No : Replace the Clockspring. Perform «BODY VERIFICATION TEST - VER 1»(ref-212785-S21580174282005122700000) .

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