Dodge Ram Truck 1500-2500-3500. Manual — part 444
*DRIVER 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
(G75) DRIVER DOOR AJAR SWITCH SENSE CIRCUIT SHORT TO GROUND
DRIVER DOOR AJAR SWITCH
INSTRUMENT CLUSTER
Diagnostic Test
1.
DRIVER DOOR AJAR SWITCH SHORT TO GROUND
With the DRBIII
T
in Inputs/Outputs, read the DRV DOOR AJAR SW
state.
While monitoring the DRBIII
T
, disconnect the Driver Door Latch con-
nector.
Did the Switch State change from CLOSED to OPEN?
Yes
>> Replace the Driver 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.
(G75) DRIVER 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 (G75) Driver
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 (G75) Driver 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).
8L - 182
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
DR/DH
*LEFT REAR DOOR AJAR CIRCUIT OPEN
DR/DH
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
8L - 183
*LEFT REAR 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 (Z79) LEFT REAR DOOR AJAR SWITCH GROUND CIRCUIT
OPEN (G77) LEFT REAR DOOR AJAR SWITCH SENSE CIRCUIT
OPEN LEFT REAR DOOR AJAR SWITCH
INSTRUMENT CLUSTER
Diagnostic Test
1.
OPEN LEFT REAR DOOR AJAR SWITCH
Disconnect the Left Rear Door Latch connector.
Connect a jumper wire between the (G77) Sense circuit and the
Ground circuit.
With the DRBIII
T
in Inputs/Outputs, read the L R DOOR AJAR SW
state.
Does the DRBIII
T
display CLOSED?
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.
OPEN (Z79) LEFT REAR DOOR AJAR SWITCH GROUND CIRCUIT
Using a 12-volt Test Light connected to 12-volts, test the (Z79) Ground
circuit in the Door Latch connector.
Does the test light illuminate brightly?
Yes
>> Go To 3
No
>> Repair the (Z79) Left Rear Door Ajar Switch Ground circuit
for an open.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
8L - 184
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
DR/DH
*LEFT REAR DOOR AJAR CIRCUIT OPEN (CONTINUED)
3.
OPEN (G77) LEFT REAR DOOR AJAR SWITCH SENSE CIRCUIT
Turn the ignition off.
Disconnect the Instrument Cluster C3 harness connector.
Measure the resistance of the (G77) Left Rear Door Ajar Switch Sense
circuit between the Instrument Cluster connector and the Door Latch
connector.
Is the resistance below 5.0 ohms?
Yes
>> Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8
-
ELECTRICAL/ELECTRONIC
CONTROL
MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)
No
>> Repair the (G77) Left Rear Door Ajar Switch Sense circuit
for an open.
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 - 185
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