Chrysler Town, Dodge Caravan. Manual — part 938

Symptom:

HEADLAMP WASHER RELAY OPEN

POSSIBLE CAUSES

OPEN GROUND CIRCUIT

FUSED B+ CIRCUIT OPEN

HEADLAMP WASHER RELAY CONTROL CIRCUIT OPEN

HEADLAMP WASHER RELAY OUTPUT CIRCUIT OPEN

HEADLAMP WASHER PUMP MOTOR

HEADLAMP WASHER RELAY

FRONT CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the Washer Pump connector.
Measure the resistance of the Washer Pump ground circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 2

No

→ Repair the open Washer Pump ground circuit.

Perform BODY VERIFICATION TEST - VER 1.

2

Turn the ignition on.
Disconnect the Headlamp Washer Relay.
Measure the voltage of the Fused B+ Circuit.
Is the voltage above 10.0 volts?

All

Yes

→ Go To 3

No

→ Repair the Fused B+ Circuit for an open condition.

Perform BODY VERIFICATION TEST - VER 1.

3

Turn the ignition off.
Disconnect the Headlamp Washer Relay.
Disconnect the FCM harness connector.
Measure the resistance of the Headlamp Washer Relay Control Circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 4

No

→ Repair the Headlamp Washer Relay Control Circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

4

Disconnect the Headlamp Washer Relay.
Disconnect the Headlamp Washer Pump Motor.
Measure the resistance of the Headlamp Washer Relay Output Circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 5

No

→ Repair the Headlamp Washer Relay Output Circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

988

WINDSHIELD WIPER & WASHER

TEST

ACTION

APPLICABILITY

5

Turn the ignition on.
Disconnect the Headlamp Washer Pump Motor connector.
Actuate the washers.
Measure the voltage of the Washer Pump Output Circuit.
Is the voltage above 10.0 volts?

All

Yes

→ Replace the Headlamp Washer Pump Motor.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 6

6

Turn the ignition off.
Install a known good relay in place of the Headlamp Washer Relay.
Turn the Washers on.
Do the Headlamp Washers operate normally?

All

Yes

→ Replace the Headlamp Washer Relay.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the Front Control Module.

Perform BODY VERIFICATION TEST - VER 1.

989

WINDSHIELD WIPER & WASHER

HEADLAMP WASHER RELAY OPEN —

Continued

Symptom:

HEADLAMP WASHER RELAY SHORT TO BATT

POSSIBLE CAUSES

FUSED B+ CIRCUIT OPEN

HEADLAMP WASHER RELAY CONTROL CIRCUIT OPEN

HEADLAMP WASHER PUMP MOTOR

HEADLAMP WASHER RELAY

FRONT CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
Disconnect the Headlamp Washer Relay.
Measure the voltage of the Fused B+ Circuit.
Is the voltage above 10.0 volts?

All

Yes

→ Go To 2

No

→ Repair the Fused B+ Circuit for an open condition.

Perform BODY VERIFICATION TEST - VER 1.

2

Turn the ignition off.
Disconnect the Headlamp Washer Relay.
Disconnect the FCM harness connector.
Measure the resistance of the Headlamp Washer Relay Control Circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 3

No

→ Repair the Headlamp Washer Relay Control Circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

3

Turn the ignition on.
Disconnect the Headlamp Washer Pump Motor connector.
Actuate the washers.
Measure the voltage of the Washer Pump Output Circuit.
Is the voltage above 10.0 volts?

All

Yes

→ Replace the Headlamp Washer Pump Motor.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 4

4

Turn the ignition off.
Install a known good relay in place of the Headlamp Washer Relay.
Turn the Washers on.
Do the Headlamp Washers operate normally?

All

Yes

→ Replace the Headlamp Washer Relay.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the Front Control Module.

Perform BODY VERIFICATION TEST - VER 1.

990

WINDSHIELD WIPER & WASHER

Symptom:

REAR WASH SWITCH INPUT STUCK

When Monitored and Set Condition:

REAR WASH SWITCH INPUT STUCK

When Monitored:

Ignition ON

Set Condition:

Switch is applied for more than 10 seconds.

POSSIBLE CAUSES

REAR WASHER SWITCH STUCK

INTERMITTENT WIRING AND CONNECTORS

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRB, select Body, Body Control Module and read the R Washer Switch
state.
Does the DRB display switch state as Closed?

All

Yes

→ Go To 2

No

→ Go To 3

2

Turn the ignition off.
Disconnect the Rear Washer Switch harness connector.
Turn the ignition on.
With the DRB, select Body, Body Control Module and read the R Washer Switch
state.
Does the DRB display switch state as Open?

All

Yes

→ Replace the Rear Washer Switch in accordance with the Service

Information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 3

3

Turn the ignition on.
With the DRBIII

t, erase all BCM and FCM DTCs.

Turn the ignition off.
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring while checking for shorts and open circuits.
Were there any problems found?

All

Yes

→ Repair as necessary.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Test Complete.

991

WINDSHIELD WIPER & WASHER