Dodge Ram Truck 1500-2500-3500. Manual — part 591

FCM-WASHER FLUID LEVEL SENSOR CIRCUIT FAILURE (CONTINUED)

2.

WASHER FLUID LEVEL SWITCH SIGNAL CIRCUIT OPEN

Turn the ignition off.

Disconnect the FCM harness connector.

Disconnect the Washer Fluid Level Switch harness connector.

Measure the resistance of the Washer Fluid Level Switch Signal cir-
cuit.

Is the resistance above 5.0 ohms?

Yes

>> Repair the Washer Fluid Level Sensor Signal circuit for an

open.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Go To 3

3.

WASHER FLUID LEVEL SWITCH GROUND CIRCUIT OPEN

Turn the ignition off.

Disconnect the FCM harness connector.

Disconnect the Washer Fluid Level Switch harness connector.

Measure the resistance of the Washer Fluid Level Switch Ground cir-
cuit.

Is the resistance above 5.0 ohms?

Yes

>> Repair the Washer Fluid Level Switch Ground circuit for an

open.

Perform BODY VERIFICATION TEST - VER 1.

No

>> Go To 4

8R - 4

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

DR/DH

FCM-WASHER FLUID LEVEL SENSOR CIRCUIT FAILURE (CONTINUED)

4.

WASHER FLUID LEVEL SWITCH SIGNAL CIRCUIT SHORT TO GROUND

Turn the ignition off.

Disconnect the FCM harness connector.

Disconnect the Washer Fluid Level Switch harness connector.

Measure the resistance between ground and the Washer Fluid Level
Switch Signal circuit.

Is the resistance below 5.0 ohms?

Yes

>> Repair the Washer Fluid Level Switch Signal circuit for a

short to ground.

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.

DR/DH

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

8R - 5

FCM-WASHER PUMP OUTPUT CIRCUIT LOW

8R - 6

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

DR/DH

FCM-WASHER PUMP OUTPUT CIRCUIT LOW (CONTINUED)

For the Wiper Washer system circuit diagram (Refer to 8 - ELECTRICAL/WIPERS/WASHERS - SCHEMATICS AND
DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
With the igntion on.

•

Set Condition:
The FCM detects less than 0.05 volts on the Washer Pump Motor Control circuit.

Possible Causes

WASHER PUMP MOTOR-FRONT

WASHER PUMP MOTOR CONTROL CIRCUIT SHORT TO GROUND

FRONT CONTROL MODULE

POWER DISTRIBUTION CENTER

1.

INTERMITTENT CONDITION

Turn the ignition on.

With the DRBIII

T

, clear all FCM DTC’s.

Actuate the Wiper Washers.

With the DRBIII

T

, read the DTC information.

Does the DRBIII

T

read: Washer Pump Output

Circuit Low?

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.

DR/DH

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

8R - 7