Dodge Ram Truck 1500-2500-3500. Manual — part 443
*DRIVER DOOR AJAR CIRCUIT OPEN
8L - 178
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
DR/DH
*DRIVER 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 (Z75) DRIVER DOOR AJAR SWITCH GROUND CIRCUIT
OPEN (G75) DRIVER DOOR AJAR SWITCH SENSE CIRCUIT
OPEN DRIVER DOOR AJAR SWITCH
INSTRUMENT CLUSTER
Diagnostic Test
1.
OPEN DRIVER DOOR AJAR SWITCH
Disconnect the Driver Door Latch connector.
Connect a jumper wire between the (G75) Sense circuit and the (Z75)
Ground circuit.
With the DRBIII
T
in Inputs/Outputs, read the DRV DOOR AJAR SW
state.
Does the DRBIII
T
display CLOSED?
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.
OPEN (Z75) DRIVER DOOR AJAR SWITCH GROUND CIRCUIT
Using a 12-volt Test Light connected to 12-volts, test the (Z75) Ground
circuit in the Door Latch connector.
Does the test light illuminate brightly?
Yes
>> Go To 3
No
>> Repair the (Z75) Driver 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)
DR/DH
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
8L - 179
*DRIVER DOOR AJAR CIRCUIT OPEN (CONTINUED)
3.
OPEN (G75) DRIVER DOOR AJAR SWITCH SENSE CIRCUIT
Turn the ignition off.
Disconnect the Instrument Cluster C3 harness connector.
Measure the resistance of the (G75) Driver 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 (G75) Driver 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)
8L - 180
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
DR/DH
*DRIVER DOOR AJAR CIRCUIT SHORTED TO GROUND
DR/DH
LAMPS/LIGHTING - INTERIOR - ELECTRICAL DIAGNOSTICS
8L - 181
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