Dodge Ram. Manual — part 136

Symptom:

FCM-WIPER SPEED RELAY OUTPUT CIRCUIT HIGH

POSSIBLE CAUSES

INTERMITTENT CONDITION

WIPER HIGH/LOW RELAY

POWER DISTRIBUTION CENTER INTERNAL SHORT TO VOLTAGE

FRONT CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, clear all FCM DTC’s.

Actuate the Wipers in all speed positions.
With the DRBIII

t, read the DTC information.

Does the DRBIII

t read: Wiper Speed Relay Output Circuit High?

All

Yes

→ Go To 2

No

→ The condition that caused the symptom is currently not present.

Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced, pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.

2

Turn the ignition off.
Remove the Wiper High/Low Relay from the IPM.
Turn the ignition on.
Activate the Wiper Switch to all speed positions.
With the DRBIII

t, read DTCs.

Does the DRBIII

t display: Wiper Speed Relay Output Circuit Open?

All

Yes

→ Replace the Wiper High/Low Relay in accordance with the Service

Information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 3

3

Turn the ignition off.
Remove the Wiper High/Low Relay from the IPM.
Remove the FCM from the IPM.
Measure the voltage between the Wiper High/Low Relay Control circuit and ground
in the IPM.
Is there any voltage present?

All

Yes

→ Replace the Power Distribution Center (PDC) in accordance with

the Service Information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the Front Control Module (FCM) in accordance with the

Service Information.
Perform BODY VERIFICATION TEST - VER 1.

541

WINDSHIELD WIPER & WASHER

Symptom:

FCM-WIPER SPEED RELAY OUTPUT CIRCUIT LOW

POSSIBLE CAUSES

INTERMITTENT CONDITION

WIPER HIGH/LOW RELAY

POWER DISTRIBUTION CENTER

FRONT CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, clear all FCM DTC’s.

Actuate the Wipers in all speed positions.
With the DRBIII

t, read the DTC information.

Does the DRBIII

t read: Wiper Speed Relay Output Circuit Low?

All

Yes

→ Go To 2

No

→ The condition that caused the symptom is currently not present.

Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced, pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.

2

Turn the ignition off.
Install a substitute relay in place of the Wiper High/Low Relay.
Turn the ignition on.
Activate the Wiper Switch to all speed positions.
With the DRBIII

t, read DTCs.

Does the DRBIII

t display: Wiper Speed Relay Output Circuit Low?

All

Yes

→ Go To 3

No

→ Replace the Wiper High/Low Relay in accordance with the Service

Information.
Perform BODY VERIFICATION TEST - VER 1.

3

Turn the ignition off.
Remove the Wiper High/Low Relay.
Remove the FCM from the IPM.
Measure the resistance between ground and the Wiper High/Low Relay Control
circuit in the IPM.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace the Power Distribution Center (PDC) in accordance with

the Service Information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the Front Control Module (FCM) in accordance with the

Service Information.
Perform BODY VERIFICATION TEST - VER 1.

542

WINDSHIELD WIPER & WASHER

Symptom:

FCM-WIPER SPEED RELAY OUTPUT CIRCUIT OPEN

POSSIBLE CAUSES

INTERMITTENT CONDITION

WIPER HIGH/LOW RELAY

POWER DISTRIBUTION CENTER

FRONT CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, clear all FCM DTC’s.

Actuate the Wipers in all speed positions.
With the DRBIII

t, read the DTC information.

Does the DRBIII

t read: Wiper Speed Relay Output Circuit Open?

All

Yes

→ Go To 2

No

→ The condition that caused the symptom is currently not present.

Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced, pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.

2

Turn the ignition off.
Install a substitute relay in place of the Wiper High/Low Relay.
Turn the ignition on.
Activate the Wiper Switch to all speed positions.
With the DRBIII

t, read DTCs.

Does the DRBIII

t display: Wiper Speed Relay Output Circuit Open?

All

Yes

→ Go To 3

No

→ Replace the Wiper High/Low Relay in accordance with the Service

Information.
Perform BODY VERIFICATION TEST - VER 1.

3

Turn the ignition off.
Remove the Wiper High/Low Relay from the IPM.
Remove the FCM from the IPM.
Measure the resistance of the Wiper High/Low Control circuit in the IPM.
Is the resistance above 5.0 ohms?

All

Yes

→ Replace the Power Distribution Center (PDC ) in accordance with

the Service Information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Replace the Front Control Module (FCM) in accordance with the

Service Information.
Perform BODY VERIFICATION TEST - VER 1.

543

WINDSHIELD WIPER & WASHER

Symptom:

MIC-WASH-BEAM INPUT CIRCUIT SHORTED

When Monitored and Set Condition:

MIC-WASH-BEAM INPUT CIRCUIT SHORTED

When Monitored:

With the ignition on.

Set Condition:

The Instrument Cluster detects less than 0.05 volts on the Wash/Beam

Select Switch Feed circuit.

POSSIBLE CAUSES

INTERMITTENT CONDITION

MULTI- FUNCTION SWITCH

WASH/BEAM SELECT SWITCH FEED CIRCUIT SHORT TO GROUND

INSTRUMENT CLUSTER

TEST

ACTION

APPLICABILITY

1

Turn the ignition on.
With the DRBIII

t, clear all MIC DTC’s.

Turn the Wipers on.
With the DRBIII

t, read the DTC information.

Does the DRBIII

t read: Wash-Beam Input Circuit Shorted?

All

Yes

→ Go To 2

No

→ The condition that caused the symptom is currently not present.

Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced, pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.

2

Turn the ignition off.
Disconnect the Multi- Function Switch harness connector.
Turn the ignition on.
With the DRBIII

t in Sensors, read the Wash - Beam SW Volts.

Does the DRBIII

t display more than 4.5 volts?

All

Yes

→ Replace the Multi- Function Switch in accordance with the

Service Information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 3

544

WINDSHIELD WIPER & WASHER