GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Regal 🢒 Body and Accessories 🢒 Seats 🢒 Lumbar Support Does Not Move Up or Down

Step

Action

Value(s)

Yes

No

1

Did you review the Lumbar Support Description?

--

Go to Step 2

Go to Symptoms - Seats

2
  1. Use a test lamp in order to backprobe the Lumbar Adjuster Switch connector B to ground.
  2. Move the Lumbar Adjuster Switch to the UP position.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3
  1. Use a test lamp in order to backprobe the Lumbar Switch connector A to ground.
  2. Move the Lumbar Adjuster Switch to the DOWN position.

Does the test lamp light?

--

Go to Step 5

Go to Step 4

4

Replace the Lumbar Adjuster Switch. Refer to Lumbar Switch Replacement .

Is the repair complete?

--

Go to Step 11

--

5
  1. Use a test lamp in order to backprobe the Lumbar Adjuster Relay connector B to ground .
  2. Move the Lumbar Adjuster Switch to the UP position.

Does the test lamp light?

--

Go to Step 6

Go to Step 8

6
  1. Use a test lamp in order to backprobe the Lumbar Adjuster Relay connector E to ground.
  2. Move the Lumbar Adjuster Switch to the DOWN position.

Does the test lamp light?

--

Go to Step 7

Go to Step 9

7

Replace the Lumbar Support Relay.

Is the repair complete?

--

Go to Step 11

--

8
  1. Use a test lamp in order to backprobe the UP/Down Lumbar Support Motor connector A to ground.
  2. Move the Lumbar switch to the DOWN position.

Does the test lamp light?

--

Go to Step 9

Go to Step 10

9
  1. Use a test lamp in order to backprobe the UP and Down Lumbar Support Motor connector B to ground.
  2. Move the Lumbar switch to the UP position.

Does the test lamp light?

--

Go to Step 11

Go to Step 10

10

Replace the Up/Down Lumbar Support Motor. Refer to Front Seat Lumbar Support Replacement .

Is the repair been completed ?

--

Go to Step 11

--

11

Verify that the system operates properly.

Does the system operate properly ?

--

System OK

Go to Symptoms - Seats