GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1999 🢒 Corvette 🢒 Body and Accessories 🢒 Data Link Communications 🢒 Power Seat Inoperative

Power Seat Inoperative Driver Seat

Power Seat Does Not Operate In Any Direction (LH)

Step

Action

Value(s)

Yes

No

DEFINITION: Driver's side power seat does not function in any direction, Passenger's side operates normally.

1

Were you sent here from the Power Seat System Diagnostic System Check?

--

Go to Step 2

Go to Power Seats System Check

2
  1. Disconnect the LH seat relay center connector C1.
  2. Use a test light to check for voltage between terminal 3 of the LH seat relay center connector C1 and ground.

Does the test light illuminate?

--

Go to Step 6

Go to Step 3

3

Check the SCM-L MiniFuse® #4.

Is the fuse open?

--

Go to Step 4

Go to Step 5

4

Repair a short to ground in CKT 1740.

Is the repair complete?

--

Go to Power Seats System Check

--

5

Locate and repair an open or a high resistance in CKT 1740.

Is the repair complete?

--

Go to Power Seats System Check

--

6
  1. Disconnect the LH seat relay center connector C3.
  2. Use a test light to check for voltage between terminal A of the LH seat relay center connector C3 and ground.

Does the test light illuminate?

--

Go to Step 10

Go to Step 7

7

Check the PWR ST/DRV Circuit Breaker #35.

Is the circuit breaker open or overheated?

--

Go to Step 8

Go to Step 9

8

Repair a short to ground in CKT 1840.

Is the repair complete?

--

Go to Power Seats System Check

--

9

Locate and repair an open or a high resistance in CKT 1840.

Is the repair complete?

--

Go to Power Seats System Check

--

10
  1. Disconnect the LH seat relay center connector C2.
  2. Connect the DMM between terminal C of the LH seat relay center connector C2 and ground.
  3. Measure CKT 150 for continuity to ground.

Is CKT 150 continuous to ground?

--

Go to Step 12

Go to Step 11

11

Locate and repair an open or a high resistance in CKT 150 between the LH seat relay center connector C2 and G205.

Is the repair complete?

--

Go to Power Seats System Check

--

12
  1. Reconnect all connectors back to the LH seat relay center.
  2. Disconnect the LH seat adjuster switch connector.
  3. Connect the DMM between terminal 7 and ground.
  4. Check CKT 1798 for continuity to ground.

Is CKT 1798 continuous to ground?

--

Go to Step 13

Go to Step 14

13

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

Is the repair complete?

--

Go to Power Seats System Check

--

14
  1. Disconnect the LH seat relay center connector C1.
  2. Connect the DMM between terminal 7 of the LH seat adjuster switch connector and terminal 8 of the LH seat relay center connector C1.
  3. Check CKT 1798 for continuity.

Is CKT 1798 continuous?

--

Go to Step 16

Go to Step 15

15

Locate and repair an open or a high resistance in CKT 1798.

Is the repair complete?

--

Go to Power Seats System Check

--

16

Replace the LH seat relay center.

Is the repair complete?

--

Go to Power Seats System Check

--

Power Seat Inoperative Passenger Seat

Power Seat Does Not Operate In Any Direction (RH)

Step

Action

Value(s)

Yes

No

DEFINITION: Passenger's side power seat does not function in any direction, driver's side operates normally.

1

Were you sent here from the Power Seat System Diagnostic System Check?

--

Go to Step 2

Go to Power Seats System Check

2
  1. Disconnect the RH seat relay center connector C1.
  2. Use a test light to check for voltage between terminal 3 of the RH seat relay center connector C1 and ground.

Does the test light illuminate?

--

Go to Step 6

Go to Step 3

3

Check the LUMBAR MiniFuse® #3.

Is the fuse open?

--

Go to Step 4

Go to Step 5

4

Repair a short to ground in CKT 1140.

Is the repair complete?

--

Go to Power Seats System Check

--

5

Locate and repair an open or a high resistance in CKT 1140.

Is the repair complete?

--

Go to Power Seats System Check

--

6
  1. Disconnect the RH seat relay center connector C3.
  2. Use a test light to check for voltage between terminal A of the RH seat relay center connector C3 and ground.

Does the test light illuminate?

--

Go to Step 10

Go to Step 7

7

Check the PWR ST/PAS Circuit Breaker #36.

Is the circuit breaker open or overheated?

--

Go to Step 8

Go to Step 9

8

Repair a short to ground in CKT 1440.

Is the repair complete?

--

Go to Power Seats System Check

--

9

Locate and repair an open or a high resistance in CKT 1440.

Is the repair complete?

--

Go to Power Seats System Check

--

10
  1. Disconnect the RH seat relay center connector C2.
  2. Connect the DMM between terminal C of the RH seat relay center connector C2 and ground.
  3. Measure CKT 150 for continuity to ground.

Is CKT 150 continuous to ground?

--

Go to Step 12

Go to Step 11

11

Locate and repair an open or a high resistance in CKT 150 between the RH seat relay center connector C2 and G302.

Is the repair complete?

--

Go to Power Seats System Check

--

12
  1. Reconnect all connectors back to the RH seat relay center.
  2. Disconnect the RH seat adjuster switch connector.
  3. Connect the DMM between terminal 7 and ground.
  4. Check CKT 1798 for continuity to ground.

Is CKT 1798 continuous to ground?

--

Go to Step 13

Go to Step 14

13

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

Is the repair complete?

--

Go to Power Seats System Check

--

14
  1. Disconnect the RH seat relay center connector C1.
  2. Connect the DMM between terminal 7 of the RH seat adjuster switch connector and terminal 8 of the RH seat relay center connector C1.
  3. Check CKT 1798 for continuity.

Is CKT 1798 continuous?

--

Go to Step 16

Go to Step 15

15

Locate and repair an open or a high resistance in CKT 1798.

Is the repair complete?

--

Go to Power Seats System Check

--

16

Replace the RH seat relay center.

Is the repair complete?

--

Go to Power Seats System Check

--