GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Driver Seat Schematics or Passenger Seat Schematics

Connector End View Reference: Power Seat Connector End Views

DEFINITION: One or more of the power seat functions are inoperative.

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2

Verify that the Power Seat Inoperative complaint is present, by attempting to operate all of the power seat motors through their full range of adjustment.

Does the power seat system operate as described in the system description and operation?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

Are all of the power seat motors inoperative?

Go to Step 4

Go to Step 6

4

  1. Disconnect the seat adjuster switch.
  2. Connect a test lamp from the battery positive voltage circuit of the switch connector to ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 10

5

Connect a test lamp from the battery positive voltage circuit of the switch connector to the ground circuit of the switch connector.

Does the test lamp illuminate?

Go to Step 9

Go to Step 11

6

  1. Disconnect the inoperative seat adjuster motor.
  2. Connect a test lamp between the motor control circuits of the harness connector.
  3. Operate the appropriate seat switch in both directions.

Does the test lamp illuminate in both directions?

Go to Step 8

Go to Step 7

7

Test the motor control circuits for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 14

Go to Step 9

8

Inspect for poor connections at the harness connector of the inoperative seat motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 14

Go to Step 13

9

Inspect for poor connections at the harness connector of the seat adjuster switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 14

Go to Step 12

10

Repair the short to ground or open in the battery positive voltage circuit of the seat adjuster switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 14

--

11

Repair the open in the ground circuit of the seat adjuster switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 14

--

12

Replace the seat adjuster switch. Refer to Power Seat Switch Replacement .

Did you complete the replacement?

Go to Step 14

--

13

Replace the seat adjuster motor Refer to Front Seat Adjuster Replacement .

Did you complete the replacement?

Go to Step 14

--

14

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2