GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Power Door Locks System Check?

--

Go to Step 2

Go to Power Door Locks System Check

2

Connect a test light between the left door lock switch connector CKT 1240 terminal F and ground.

Did the test light illuminate?

--

Go to Step 3

Go to Step  4

3

Connect the test light between the left door lock switch connector terminal F and terminal B.

Did the test light illuminate?

--

Go to Step 5

Go to Step 6

4

Repair the open in CKT 1240 between splice S307 and the left door lock switch terminal F. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Power Door Locks System Check

--

5

Connect the test light between the left door front door lock switch connector terminal F and terminal C.

Did the test light illuminate?

--

Go to Step 8

Go to Step 9

6

  1. Disconnect the left door lock switch.
  2. Disconnect the right front door lock switch.
  3. Measure the resistance in CKT 194 between the left front door lock switch connector terminal B and the right front door lock switch connector terminal C.

Is the resistance within the specified range?

0-2 ohms

Go to Step 14

Go to Step 7

7

Repair an open in CKT 194 between the left front door lock switch connector terminal B and the right front door lock switch connector terminal C. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Power Door Locks System Check

--

8

Measure the resistance in CKT 294 between the left front door lock switch harness connector terminal B and S303.

Is the resistance within the specified range?

0-2 ohms

Go to Step 11

Go to Step 13

9

  1. Disconnect the left door lock switch.
  2. Disconnect the right front door lock switch.
  3. Measure the resistance in CKT 195 between the left front door lock switch harness connector terminal G and the right front door lock switch harness connector terminal B.

Is the resistance within the specified range?

0-2 ohms

Go to Step  14

Go to Step 10

10

Repair an open in CKT 195 between the left front door lock switch harness connector terminal G and the right front door lock switch harness connector terminal B. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Power Door Locks System Check

--

11

Measure the resistance in CKT 295 between the left front door lock switch harness connector terminal C and S248.

Is the resistance within the specified range?

0-2 ohms

Go to Step  14

Go to Step  12

12

Repair an open in CKT 295 between the left front door lock switch harness connector terminal C and S248. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Power Door Locks System Check

--

13

Repair an open in CKT 294 between the left front door lock switch harness connector terminal C and S303. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Power Door Locks System Check

Go to Step 14

14

Inspect for a faulty connection at the left door lock switch.

Is the connection OK?

--

Go to Step 16

Go to Step 15

15

Repair the faulty connection at the left door lock switch. Refer to Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Power Door Locks System Check

--

16

Replace the left door lock switch. Refer to Door Lock Switch Replacement .

Did you complete the repair?

--

Go to Power Door Locks System Check

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