Dodge Ram Truck 1500-2500-3500. Manual — part 478

*CYLINDER LOCK SWITCH INOPERATIVE (CONTINUED)

4.

(G163) CYLINDER LOCK SWITCH MUX OPEN

Turn the ignition off.

Disconnect the Instrument Cluster C4 connector.

Measure the resistance of the (G163) Cylinder Lock Switch Mux circuit
between the Switch connector and the Instrument Cluster connector.

Is the resistance below 5.0 ohms?

Yes

>> Go To 5

No

>> Repair the (G163) Cylinder Lock Switch Mux circuit for an

open.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

5.

(G163) CYLINDER LOCK SWITCH MUX WIRE SHORT TO GROUND

Measure the resistance between Ground and the (G163) Cylinder
Lock Switch Mux circuit in the Cluster C4 connector.

Is the resistance below 1000.0 ohms?

No

>> Replace the Instrument Cluster.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

Yes

>> Repair the (G163) Cylinder Lock Switch Mux circuit for a

short to ground.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

8N - 54

POWER LOCKS - ELECTRICAL DIAGNOSTICS

DR/DH

*DOOR LOCK INHIBIT INOPERATIVE

For a complete wiring diagram Refer to Section 8W.

Possible Causes

CHIME INOPERATIVE

INSTRUMENT CLUSTER

Diagnostic Test

1.

CHIME INOPERATIVE

Turn the ignition off but leave the key in the ignition.

Open the drivers door.

Does the chime sound?

Yes

>> Replace the Instrument Cluster.Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRI-

CAL/ELECTRONIC CONTROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)

No

>> Perform the test “*KEY IN IGNITION AND DRIVER’S DOOR OPEN CHIME INOPERATIVE”. (Refer to 8

- ELECTRICAL/CHIME/BUZZER - DIAGNOSIS AND TESTING).

DR/DH

POWER LOCKS - ELECTRICAL DIAGNOSTICS

8N - 55

*LEFT REAR DOOR FAILS TO LOCK AND UNLOCK

8N - 56

POWER LOCKS - ELECTRICAL DIAGNOSTICS

DR/DH

*LEFT REAR DOOR FAILS TO LOCK AND UNLOCK (CONTINUED)

For the Power Door Lock circuit diagram (Refer to 8 - ELECTRICAL/POWER LOCKS - SCHEMATICS AND DIA-
GRAMS)

For a complete wiring diagram Refer to Section 8W.

Possible Causes

DTC PRESENT

(P393) DOOR LOCK DRIVER LEFT DOORS WIRE OPEN

(P5) DOOR UNLOCK DRIVER LEFT REAR WIRE OPEN

DOOR LATCH

INSTRUMENT CLUSTER

Diagnostic Test

1.

DTC PRESENT

Turn the ignition on.

With the DRBIII

T

, read DTC’s.

Does the DRBIII

T

display any Door Lock related

DTC’s?

Yes

>> Refer to symptom list for problems related

to Power Door Locks to diagnose and
repair DTC’s.

No

>> Go To 2

DR/DH

POWER LOCKS - ELECTRICAL DIAGNOSTICS

8N - 57