GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Seville 🢒 Body and Accessories 🢒 Seats 🢒 Power Seat Inoperative

Power Seat Inoperative without A45

Step

Action

Value(s)

Yes

No

1

Was the entire Power Seats System Check performed?

--

Go to Step 2

Go to Power Seats System Check

2

Does the other power seat operate properly?

--

Go to Step 7

Go to Step 3

3

Check the rear fuse block PWR SEAT circuit breaker for continuity.

Is the PWR SEAT circuit breaker OK?

--

Go to Step 4

Go to Step 5

4

Replace the rear fuse block.

Is the rear fuse block replacement complete?

--

Go to Power Seats System Check

--

5

Repair the short to ground in CKT 3740 (ORN). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Step 6

--

6

Replace the PWR SEAT circuit breaker in the rear fuse block.

Is the PWR SEAT circuit breaker replacement complete?

--

Go to Power Seats System Check

--

7

Backprobe the seat switch connector with a DMM from cavity J (ORN) (LH) or cavity P (ORN) (RH) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 8

Go to Step 10

8

Backprobe the seat switch connector with a DMM from cavities J (ORN) to L (BLK) (LH) or cavities P (ORN) to S (BLK) (RH).

Is the voltage within the specified range?

10-15 V

Go to Step 9

Go to Step 11

9

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

Is the seat switch replacement complete?

--

Go to Power Seats System Check

--

10

Repair the open in CKT 3740 (ORN) between the rear fuse block and the seat switch. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Power Seats System Check

--

11

Repair the open in CKT 550 (BLK) between G302 and the seat switch (LH) or CKT 650 (BLK) between G302 and the RH seat switch (RH). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Power Seats System Check

--

Power Seat Inoperative A45 with AL2

Step

Action

Value(s)

Yes

No

1

Was the entire Memory Seats System Check performed?

--

Go to Step 2

Go to Memory Seats System Check

2

Check the rear fuse block PWR SEAT circuit breaker for continuity.

Is the PWR SEAT circuit breaker OK?

--

Go to Step 3

Go to Step 4

3

Check the rear fuse block MEM T&T Fuse for an open.

Is the MEM T&T Fuse OK?

--

Go to Step 8

Go to Step 6

4

Repair the short to ground in CKT 3740 (ORN). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Step 5

--

5

Replace the PWR SEAT circuit breaker in the rear fuse block.

Is the PWR SEAT circuit breaker replacement complete?

--

Go to Memory Seats System Check

--

6

Repair the short to ground in CKT 2840 (ORN). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Step 7

--

7

Replace the MEM T&T Fuse in the rear fuse block.

Is the MEM T&T Fuse replacement complete?

--

Go to Memory Seats System Check

--

8
  1. Disconnect the memory seat module (MSM) connector C1.
  2. Connect a DMM from the MSM connector C1 cavity A (ORN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 9

Go to Step 15

9

Connect a DMM between the MSM connector C1 cavities A (ORN) and B (BLK).

Is the voltage within the specified range?

10-15 V

Go to Step 10

Go to Step 16

10
  1. Disconnect the memory seat module (MSM) connector C2.
  2. Connect a DMM from the MSM connector C2 cavity D11 (ORN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 11

Go to Step 17

11
  1. Disconnect the seat switch connector.
  2. Connect a DMM from the seat switch cavity J (ORN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 12

Go to Step 18

12

Does the seat move when a memory recall or easy exit function is performed?

--

Go to Step 13

Go to Step 14

13

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

Is the seat switch replacement complete?

--

Go to Memory Seats System Check

--

14

Replace the memory seat module (MSM). Refer to Memory Seat Control Module Replacement .

Is the MSM replacement complete?

--

Go to Memory Seats System Check

--

15

Repair the open in CKT 3740 (ORN) between the rear fuse block and the MSM. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Memory Seats System Check

--

16

Repair the open in CKT 550 (BLK) between S313 and the MSM. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Memory Seats System Check

--

17

Repair the open in CKT 2840 (ORN) between S326 and the MSM. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Memory Seats System Check

--

18

Repair the open in CKT 2840 (ORN) between S326 and the seat switch. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Memory Seats System Check

--

Power Seat Inoperative A45 with AC9

Step

Action

Value(s)

Yes

No

1

Was the entire Memory Seats System Check performed?

--

Go to Step 2

Go to Memory Seats System Check

2

Check the rear fuse block PWR SEAT circuit breaker for continuity.

Is the PWR SEAT circuit breaker OK?

--

Go to Step 3

Go to Step 4

3

Check the rear fuse block MEM T&T Fuse for an open.

Is the MEM T&T Fuse OK?

--

Go to Step 8

Go to Step 6

4

Repair the short to ground in CKT 3740 (ORN). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Step 5

--

5

Replace the PWR SEAT circuit breaker in the rear fuse block.

Is the PWR SEAT circuit breaker replacement complete?

--

Go to Memory Seats System Check

--

6

Repair the short to ground in CKT 2840 (ORN). Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Step 7

--

7

Replace the MEM T&T Fuse in the rear fuse block.

Is the MEM T&T Fuse replacement complete?

--

Go to Memory Seats System Check

--

8
  1. Disconnect the memory seat module (MSM) connector C1.
  2. Connect a DMM from the MSM connector C1 cavity A (ORN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 9

Go to Step 15

9

Connect a DMM between the MSM connector C1 cavities A (ORN) and B (BLK).

Is the voltage within the specified range?

10-15 V

Go to Step 10

Go to Step 16

10
  1. Disconnect the memory seat module (MSM) connector C2.
  2. Connect a DMM from the MSM connector C2 cavity B11 (ORN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 11

Go to Step 17

11
  1. Disconnect the seat switch connector.
  2. Connect a DMM from the seat switch cavity J (ORN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 12

Go to Step 18

12

Does the seat move when a memory recall or easy exit function is performed?

--

Go to Step 13

Go to Step 14

13

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

Is the seat switch replacement complete?

--

Go to Memory Seats System Check

--

14

Replace the memory seat module (MSM). Refer to Memory Seat Control Module Replacement .

Is the MSM replacement complete?

--

Go to Memory Seats System Check

--

15

Repair the open in CKT 3740 (ORN) between the rear fuse block and the MSM. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Memory Seats System Check

--

16

Repair the open in CKT 550 (BLK) between S313 and the MSM. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Memory Seats System Check

--

17

Repair the open in CKT 2840 (ORN) between S326 and the MSM. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Memory Seats System Check

--

18

Repair the open in CKT 2840 (ORN) between S326 and the seat switch. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Memory Seats System Check

--