Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 583
13.
SWITCH GROUND CIRCUIT OPEN
Using a 12-volt test light connected to 12-volts, check the Ground cir-
cuit in the Liftgate Release Switch harness connector.
Does the test light illuminate brightly?
No
>> Repair the Ground circuit for an open.Perform BODY VER-
IFICATION TEST - VER 1 (Refer to BODY VERIFICATION
TEST - VER 1).
Yes
>> Go To 14
14.
(P25) DECKLID/LIFTGATE RELEASE SWITCH SENSE CIRCUIT SHORT TO GROUND.
Disconnect the Cluster C1 connector.
Measure the resistance between Ground and the (G25) Decklid/Liftgate
Release Switch sense circuit.
Is the resistance below 1000.0 ohms?
Yes
>> Repair the (G25) Decklid/Liftgate Release Switch Sense cir-
cuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1 (Refer to
BODY VERIFICATION TEST - VER 1).
No
>> Go To 11
8N - 30
POWER LOCKS - ELECTRICAL DIAGNOSTICS
LX
15.
(P25) DECKLID/LIFTGATE RELEASE SWITCH SENSE CIRCUIT OPEN.
Measure the resistance of the (G25) Decklid/Liftgate Release Switch
sense circuit between the Switch connector and the Cluster C1 connec-
tor.
Is the resistance below 5.0 ohms?
No
>> Repair the (G25) Decklid/Liftgate Release Switch Sense cir-
cuit for an open.
Perform BODY VERIFICATION TEST - VER 1 (Refer to
BODY VERIFICATION TEST - VER 1).
Yes
>> Replace the Instrument Cluster
Perform BODY VERIFICATION TEST - VER 1 (Refer to
BODY VERIFICATION TEST - VER 1).
LX
POWER LOCKS - ELECTRICAL DIAGNOSTICS
8N - 31
*ALL DOORS FAIL TO LOCK
For a complete wiring diagram Refer to Section 8W.
8N - 32
POWER LOCKS - ELECTRICAL DIAGNOSTICS
LX
Theory of Operation
Both the Door Lock Driver circuits (P392 and P393) are connected together inside the Cluster. Therefore either
circuit shorted will affect all door locks. Depending on where the short is, some doors may lock.
Possible Causes
(P392) DOOR LOCK DRIVER CIRCUIT SHORT TO GROUND
(P393) DOOR LOCK DRIVER CIRCUIT SHORT TO GROUND
CLUSTER
Diagnostic Test
1.
CHECK FOR DOOR LOCK DTC’S
Turn the ignition on.
With the scan tool, record and erase DTC’s.
Turn the ignition off, wait 10 seconds then turn the ignition on.
Try to operate the door locks several times.
With the scan tool, read active DTC’s.
Does the scan tool display any Door Lock System DTC’s?
No
>> Go To 2
Yes
>> Refer to symptom list for problems related to POWER DOOR LOCKS.
2.
CHECK (P392) DOOR LOCK DRIVER RIGHT DOORS CIRCUIT FOR A SHORT TO GROUND
NOTE: If only one motor is inoperative when the door locks are actuated, disconnect that motor and retest
to see if the other doors lock properly. If they do, replace the defective motor.
NOTE: Ensure the door lock inhibit (key in ignition) and the door ajar systems are operating properly before
proceeding. These systems affect the door lock locking functions if they are not working as they should.
Turn the ignition off.
Disconnect the Cluster C1 connector.
Measure the resistance between ground and the (P392) Door Lock
Driver circuit.
Is the resistance below 1000.0 ohms?
No
>> Go To 3
Yes
>> Repair the (P392) Door Lock Driver circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1. (Refer to
BODY VERIFICATION TEST – VER 1).
LX
POWER LOCKS - ELECTRICAL DIAGNOSTICS
8N - 33
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