Chrysler Town, Dodge Caravan. Manual — part 841

Symptom:

HORN RELAY OPEN

When Monitored and Set Condition:

HORN RELAY OPEN

When Monitored:

Continuously with the ignition on.

Set Condition:

The FCM has detected an open in the Horn Relay Control circuit.

POSSIBLE CAUSES

FUSE AND RELAY CENTER INTERNAL MALFUNCTION

HORN RELAY

INTERMITTENT CONDITION

FRONT CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, erase the current Front Control Module DTC’s.

Turn the ignition off, wait 10 seconds then turn the ignition on.
With the DRBIII

t, read the current Front Control Module DTC’s.

Does the DRBIII

t display: HORN RELAY OPEN?

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 Horn Relay from the Fuse and Relay Center.
Substitute the original Horn Relay with a known good relay.
Turn the ignition on.
With the DRBIII

t, erase the current Front Control Module DTCs.

Turn the engine off, wait 10 seconds then turn the ignition on.
Attempt to operate the horn.
With the DRBIII

t, read the current Front Control Module DTC’s.

Does the DRBIII

t display: HORN RELAY OPEN?

All

Yes

Go To 3

No

→ Replace the Horn Relay.

Perform BODY VERIFICATION TEST - VER 1.

600

IGNITION, POWER, ACCESSORY

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Remove the Horn Relay from the Fuse and Relay Center.
Disconnect the Front Control Module from the Fuse and Relay Center.
Measure the resistance of the Horn Relay Control circuit between the FCM connector
cavity 10 and the Horn Relay connector cavity 85.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace the Front Control Module.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the Fuse and Relay Center.

Perform BODY VERIFICATION TEST - VER 1.

601

IGNITION, POWER, ACCESSORY

HORN RELAY OPEN —

Continued

Symptom:

HORN RELAY SHORTED TO B+

When Monitored and Set Condition:

HORN RELAY SHORTED TO BATTERY

When Monitored:

Continuously with the ignition on.

Set Condition:

The FCM has detected a short to battery in the Horn Relay Control circuit.

POSSIBLE CAUSES

FUSE AND RELAY CENTER INTERNAL MALFUNCTION

HORN RELAY

INTERMITTENT CONDITION

FRONT CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, erase the current Front Control Module DTC’s.

Turn the ignition off, wait 10 seconds then turn the ignition on.
With the DRBIII

t, read the current Front Control Module DTC’s.

Does the DRBIII

t display: HORN RELAY SHORTED TO BATTERY?

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 Horn Relay from the Fuse and Relay Center.
Substitute the original Horn Relay with a known good relay.
Turn the ignition on.
With the DRBIII

t, erase the current Front Control Module DTCs.

Turn the ignition off, wait 10 seconds, then turn the ignition on.
Attempt to operate the horn.
With the DRBIII

t, read the current Front Control Module DTC’s.

Does the DRBIII

t display: HORN RELAY SHORTED TO BATTERY?

All

Yes

Go To 3

No

→ Replace the Horn Relay.

Perform BODY VERIFICATION TEST - VER 1.

602

IGNITION, POWER, ACCESSORY

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Disconnect the Front Control Module from the Fuse and Relay Center.
Disconnect the Horn Relay from the Fuse and Relay Center.
Measure the voltage of the Horn Relay Control circuit at the Fuse and Relay Center
side of the FCM connector.
Is the voltage above 10.0 volts?

All

Yes

→ Replace the Fuse and Relay Center.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the Front Control Module.

Perform BODY VERIFICATION TEST - VER 1.

603

IGNITION, POWER, ACCESSORY

HORN RELAY SHORTED TO B+ —

Continued

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Текст

Политика конфиденциальности