Dodge Ram Truck 1500-2500-3500. Manual — part 445

*LEFT REAR DOOR AJAR CIRCUIT SHORTED TO GROUND

8L - 186

LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS

DR/DH

*LEFT REAR DOOR AJAR CIRCUIT SHORTED TO GROUND (CONTINUED)

For the Door Ajar System circuit diagram (Refer to 8 - ELECTRICAL/LAMPS/LIGHTING - INTERIOR - SCHEMAT-
ICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

Possible Causes

(G77) LEFT REAR DOOR AJAR SWITCH SENSE CIRCUIT SHORT TO GROUND

LEFT REAR DOOR AJAR SWITCH

INSTRUMENT CLUSTER

Diagnostic Test

1.

LEFT REAR DOOR AJAR SWITCH SHORT TO GROUND

With the DRBIII

T

in Inputs/Outputs, read the L R DOOR AJAR SW

state.

While monitoring the DRBIII

T

, disconnect the Left Rear Door Latch

connector.

Did the Switch State change from CLOSED to OPEN?

Yes

>> Replace the Left Rear Door Latch.

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

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING.

No

>> Go To 2

2.

(G77) LEFT REAR DOOR AJAR SWITCH SENSE CIRCUIT SHORT TO GROUND

Turn the ignition off.

Disconnect the Instrument Cluster C3 harness connector.

Using a 12-volt test light connected to 12-volts, probe the (G77) Left
Rear Door Ajar Switch Sense circuit and test for a short to ground.

Turn the ignition on.

Does the test light illuminate brightly?

Yes

>> Repair the (G77) Left Rear Door Ajar Switch Sense 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)

No

>> Replace the Instrument Cluster.

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

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TESTING).

DR/DH

LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS

8L - 187

*PASSENGER DOOR AJAR CIRCUIT OPEN

8L - 188

LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS

DR/DH

*PASSENGER DOOR AJAR CIRCUIT OPEN (CONTINUED)

For the Door Ajar System circuit diagram (Refer to 8 - ELECTRICAL/LAMPS/LIGHTING - INTERIOR - SCHEMAT-
ICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

Possible Causes

OPEN (Z74) PASSENGER DOOR AJAR SWITCH GROUND CIRCUIT

OPEN (G74) PASSENGER DOOR AJAR SWITCH SENSE CIRCUIT

OPEN PASSENGER DOOR AJAR SWITCH

INSTRUMENT CLUSTER

Diagnostic Test

1.

OPEN PASSENGER DOOR AJAR SWITCH

Disconnect the Passenger Door Latch connector.

Connect a jumper wire between the (G74) Sense circuit and the (Z74)
Ground circuit.

With the DRBIII

T

in Inputs/Outputs, read the PASS DOOR AJAR SW

state.

Does the DRBIII

T

display CLOSED?

Yes

>> Replace the Passenger Door Latch.

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

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

No

>> Go To 2

2.

OPEN (Z74) PASSENGER DOOR AJAR SWITCH GROUND CIRCUIT

Using a 12-volt Test Light connected to 12-volts, test the (Z74) Ground
circuit in the Door Latch connector.

Does the test light illuminate brightly?

Yes

>> Go To 3

No

>> Repair the (Z74) Passenger Door Ajar Switch Ground cir-

cuit for an open.

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

ELECTRICAL/ELECTRONIC

CONTROL

MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

DR/DH

LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS

8L - 189