GM Service Manual Online
For 1990-2009 cars only

Step

Action

Yes

No

Schematic Reference: Power Seats Schematics

1

Did you review the Power Seat System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Power Seats System Description and Operation

2

Operate the Power Seat System.

Does the system operate normally?

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

Go to Step 3

3

Are all of the power seat adjuster motors inoperative?

Go to Step 4

Go to Step 6

4

  1. Disconnect the inoperative power seat switch.
  2. Connect a test lamp between the battery positive voltage circuit at the power seat switch harness connector and a good ground.

Did the test lamp illuminate?

Go to Step 5

Go to Step 10

5

Connect a test lamp between the ground circuit at the power seat switch harness connector and the battery positive voltage.

Did 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 seat adjuster motor control circuits at the seat adjuster motor harness connector.
  3. Operate the power seat switch to the appropriate positions for the inoperative seat adjuster motor.

Did the test lamp illuminate with each command?

Go to Step 8

Go to Step 7

7

Test the seat adjuster motor control circuits for a open or short to ground. Refer to Circuit Testing and Wiring Repairs or Connector 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 adjuster 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 inoperative power seat 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 open or short to ground in the battery positive voltage circuit to the power seat switch harness connector. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 14

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11

Repair the open in the ground circuit to the power seat switch. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 14

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12

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

Is the repair complete?

Go to Step 14

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13

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

Is the repair complete?

Go to Step 14

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14

  1. Reconnect any disconnected components.
  2. Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2