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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2000 🢒 Eldorado 🢒 Body and Accessories 🢒 Seats 🢒 Lumbar Support Does Not Move In or Out

Lumbar Support Does Not Move In or Out AL2

Step

Action

Value(s)

Yes

No

DEFINITION: This table diagnoses the lumbar support, in out inoperative (option AL2) in the left or right seat.

1

Did you perform the Lumbar Support System Check?

--

Go to Step 2

Go to Lumbar Support System Check

2

Use a test lamp in order to backprobe the lumbar horizontal relay connector from cavity C (RED) to ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 11

3

Use a test lamp in order to backprobe the lumbar horizontal relay connector from cavity C (RED) to cavity D (BLK).

Does the test lamp light?

--

Go to Step 4

Go to Step 12

4
  1. Place the lumbar switch in the IN position.
  2. Use a test lamp in order to backprobe the lumbar horizontal relay connector from cavity A (GRY) to ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 13

5
  1. Place the lumbar switch in the OUT position.
  2. Use a test lamp in order to backprobe the lumbar horizontal relay connector from cavity F (PPL) to ground.

Does the test lamp light?

--

Go to Step 6

Go to Step 14

6
  1. Place the lumbar switch in the IN position.
  2. Use a test lamp in order to backprobe the lumbar horizontal relay connector from cavity B (PNK) (LH) or cavity B (WHT) (RH) to ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 16

7
  1. Place the lumbar switch in the OUT position.
  2. Use a test lamp in order to backprobe the lumbar horizontal relay connector from cavity E (DK BLU) to ground.

Does the test lamp light?

--

Go to Step 8

Go to Step 16

8

Test for an open or short to ground in CKT 610 (PNK or PNK/BLK) (LH) or CKT 210 (WHT or PNK/BLK) (RH) between the lumbar horizontal relay and the lumbar horizontal motor. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems.

Is the wiring OK?

--

Go to Step 9

Go to Step 17

9

Test for an open or short to ground in CKT 611 (DK BLU or DK BLU/WHT) (LH) or CKT 211 (DK BLU or DK BLU/WHT) (RH) between the lumbar horizontal relay and the lumbar horizontal motor. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems.

Is the wiring OK?

--

Go to Step 10

Go to Step 17

10

Replace the lumbar horizontal motor. Refer to Front Seat Lumbar Support Replacement .

Is the lumbar horizontal motor replacement complete?

--

Go to Lumbar Support System Check

--

11

Repair the open in CKT 742 (RED) between splice S352 (LH) or splice S356 (RH) and the lumbar horizontal relay. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Lumbar Support System Check

--

12

Repair the open in CKT 850 (BLK) between splice S351 (LH) or splice S357 (RH) and the lumbar horizontal relay. Refer to Wiring Repairs in Wiring Systems.

Is the circuit repair complete?

--

Go to Lumbar Support System Check

--

13

Test for an open or short to ground in CKT 466 (GRY) (LH) or CKT 758 (GRY) (RH) between the lumbar switch and the lumbar horizontal relay. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems.

Is the wiring OK?

--

Go to Step 15

Go to Step 17

14

Test for an open or short to ground in CKT 385 (PPL) (LH) or CKT 759 (PPL) (RH) between the lumbar switch and the lumbar horizontal relay. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems.

Is the wiring OK?

--

Go to Step 15

Go to Step 17

15

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

Is the lumbar switch replacement complete?

--

Go to Lumbar Support System Check

--

16

Replace the lumbar horizontal relay.

Is the lumbar horizontal relay replacement complete?

--

Go to Lumbar Support System Check

--

17

Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Lumbar Support System Check

--

Lumbar Support Does Not Move In or Out A45

Step

Action

Value(s)

Yes

No

DEFINITION: This table diagnoses inoperative lumbar support, does not move in or out (A45 and/or AM3), in the left seat.

1

Did you perform the entire Lumbar Support: Memory System Check?

--

Go to Step 2

Go to Lumbar Support System Check

2
  1. Turn the ignition switch to the ON position.
  2. Connect a scan tool to the data link connector (DLC).
  3. Select INPUTS from the memory seat module (MSM) DATA DISPLAY.
  4. Operate the LH lumbar switch in the IN and OUT position.

Does the scan tool indicate that the seat switch input was received?

--

Go to Step 3

Go to Step 18

3
  1. Disconnect the LH lumbar horizontal motor connector.
  2. Connect a fused jumper between battery positive voltage (B+) and one of the lumbar motor cavities.
  3. Connect a fused jumper between the other lumbar motor cavity and ground.

Does the motor run?

--

Go to Step 4

Go to Step 6

4

Test for an open or short to ground in CKT 610 (PNK) or (PNK/BLK) between the MSM and the LH lumbar horizontal motor. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems.

Is the wiring OK?

--

Go to Step 5

Go to Step 12

5

Test for an open or short to ground in CKT 611 (DK BLU) or (DK BLU/WHT) between the MSM and the LH lumbar horizontal motor. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems.

Is the wiring OK?

--

Go to Step 7

Go to Step 13

6

Replace the LH lumbar horizontal motor. Refer to Front Seat Lumbar Support Replacement .

Is the lumbar horizontal motor replacement complete?

--

Go to Step 22

--

7

Test for proper terminal contact at the MSM connectors. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Is terminal contact OK?

--

Go to Step 8

Go to Step 14

8

Test for an open in CKT 1840 (ORN) between the MSM connector C2 cavity D and splice S306. Refer to Testing for Continuity in Wiring Systems.

Is the wiring OK?

--

Go to Step 9

Go to Step 15

9

Test for an open in CKT 742 (RED) between the MSM connector C4 cavity B and splice S311. Refer to Testing for Continuity in Wiring Systems.

Is the wiring OK?

--

Go to Step 10

Go to Step 16

10

Test for an open in CKT 850 (BLK) between the MSM connector C2 cavity C and splice S351. Refer to Testing for Continuity in Wiring Systems.

Is the wiring OK?

--

Go to Step 11

Go to Step 17

11

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

Is the memory seat module replacement complete?

--

Go to Step 22

--

12

Repair the open or short to ground in CKT 610 (PNK) or (PNK/BLK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 22

--

13

Repair the open or short to ground in CKT 611 (DK BLU) or (DK BLU/WHT). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 22

--

14

Repair the appropriate terminals. Refer to Connector Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 22

--

15

Repair the open in CKT 1840 (ORN). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 22

--

16

Repair the open in CKT 742 (RED). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 22

--

17

Repair the open in CKT 850 (BLK). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 22

--

18
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the LH lumbar switch connector.
  3. Operate the LH lumbar switch in the IN position.
  4. Connect a J 39200 digital multimeter (DMM) between the LH lumbar switch connector cavity E (BLK) and cavity B (GRY).

Is the resistance less than the specified value?

5 ohms

Go to Step 19

Go to Step 21

19
  1. Operate the LH lumbar switch in the OUT position.
  2. Connect a DMM between the LH lumbar switch connector cavity E (BLK) and cavity A (PPL).

Is the resistance less than the specified value?

5 ohms

Go to Step 20

Go to Step 21

20

Repair the open in CKT 466 (GRY) or CKT 385 (PPL). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Step 22

--

21

Replace the LH lumbar switch. Refer to Power Seat Switch Replacement .

Is the lumbar switch replacement complete?

--

Go to Step 22

--

22

Perform the Lumbar Support System Check .

Is the system check complete?

--

System OK

--