GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you review the steering wheel controls system operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms

2

Verify that the steering wheel controls illumination is inoperative.

Does the steering wheel controls illumination operate normally?

--

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

Go to Step 3

3

Is the illumination for both switch assemblies inoperative?

--

Go to Step 10

Go to Step 4

4

If the switch assembly is partially lit replace the appropriate switch assembly. Refer to Steering Wheel Control Switches Replacement .

Did you complete the replacement?

--

Go to step 17

Go to Step 5

5

Test CKT 949 (GRY) at the appropriate switch assembly for an open.

Is there an open in CKT 949 (GRY)?

--

Go to Step 6

Go to Step 7

6

Repair the open in CKT 949 (GRY).

Did you complete the repair?

--

Go to step 17

--

7

Test CKT 152 (BLK) at the appropriate switch assembly for an open.

Is there an open in CKT 152 (BLK)?

--

Go to Step 8

Go to Step 9

8

Repair the open in CKT 152 (BLK).

Did you complete the repair?

--

Go to step 17

--

9

Replace the appropriate switch assembly. Refer to Steering Wheel Control Switches Replacement .

Did you complete the replacement?

--

Go to step 17

--

10

Inspect the STR WHL ILLUM fuse 6 for an open.

Is the fuse open?

--

Go to Step 11

Go to Step 14

11

Test CKT 1244 (BRN)/CKT 949 (GRY) for a short to ground.

Is there a short to ground in CKT 1244 (BRN)/CKT 949 (GRY)?

--

Go to Step 12

Go to Step 13

12

Repair the short to ground in CKT 1244 (BRN)/CKT 949 (GRY).

Did you complete the repair?

--

Go to Step 13

--

13

Replace the STR WHL ILLUM fuse 6.

Did you complete the replacement?

--

Go to step 17

--

14

Test CKT 1850 (BLK)/ CKT 152 (BLK) for an open circuit.

Is there an open in CKT 1850 (BLK)/ CKT 152 (BLK)?

--

Go to step 15

Go to step 16

15

Repair the open in CKT 1850 (BLK)/ CKT 152 (BLK).

Did you complete the repair?

--

Go to step 17

--

16

Replace the switch assemblies. Refer to Steering Wheel Control Switches Replacement .

Did you complete the repair?

--

Go to step 17

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17

Operate the system in order to verify the repair.

Did you find and correct the condition?

--

System OK

Go to Step 3