GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Locks System Check?

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Go to Step 2

Go to Power Door Locks System Check

2

Measure the voltage at the malfunctioning door lock actuator harness connector between terminal A and terminal B while operating the power door lock switch.

Is the voltage within the specified range?

10-15 V

Go to Step 3

Go to Step 4

3

Replace the malfunctioning door lock actuator. Refer to Door Lock Actuator Replacement .

Did you complete the repair?

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Go to Power Door Locks System Check

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4

Measure the resistance between the malfunctioning door lock actuator harness connector terminal A and each of the following terminals:

    • Driver door module (DDM) harness connector 3 terminal G
    • Passenger door module (PDM) harness connector  3 terminal L
    • Rear door module (RDM) harness connector 1 terminal A2 - RR door
    • RDM harness connector 1 terminal B2 - LR door

Is the resistance within the specified range?

0-5 ohms

Go to Step 6

Go to Step 5

5

Repair an open in any of the following circuits. Refer to Wiring Repairs in Wiring Systems.

    • LF door - CKT 694
    • RF door -CKT 294
    • RF door - CKT 1095
    • LR door - CKT 1092

Did you complete the repair?

--

Go to Power Door Locks System Check

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6

Measure the resistance between the inoperative door lock actuator harness connector terminal B and each of the following terminals:

    • DDM harness connector 3 terminal H
    • PDM harness connector 3 terminal M
    • RDM harness connector 1 terminal A1 - RR door
    • RDM harness connector 1 terminal B1 - LR door

Is the resistance within the specified range?

0-5 ohms

Go to Step 8

Go to Step 7

7

Repair an open in any of the following circuits. Refer to Wiring Repairs in Wiring Systems.

    • LF door - CKT 1089
    • RF door - CKT 1090
    • RR door - CKT 1094
    • LR door - CKT 1091

Did you complete the repair?

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Go to Power Door Locks System Check

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8

Replace the door module at the malfunctioning door.

Refer to one of the following procedures:

Did you complete the repair?

--

Go to Power Door Locks System Check

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