GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Exterior Lights System Check performed?

--

Go to Step 2

Go to Exterior Lights System Check

2

Are the left turn signal lamps operative?

--

Go to Step 7

Go to Step 3

3

  1. Disconnect connector C200 at the steering column.
  2. Connect a J 39200 DMM between connector C200, pin E9 for the pigtail wire of CKT 16 (PPL), and pin A7 for the pigtail wire of CKT 14 (LT BLU).
  3. Place the turn signal switch in the left turn position.

Is continuity present?

--

Go to Step 4

Go to Step 5

4

Repair the open in CKT 14 (LT BLU) between connector C200 and splice S236.

Are the left turn signal lamps operative?

--

Go to Step 7

Go to Step 5

5

Repair the open in the pigtail wire of CKT 14 (LT BLU) in the steering column.

Are the left turn signal lamps operative?

--

Go to Step 7

Go to Step 6

6

Replace the turn signal switch (part of the multi-function lever).

Are the turn signal lamps operative?

--

Go to Exterior Lights System Check

Go to Step 7

7

Are the right turn signal lamps operative?

--

Go to Exterior Lights System Check

Go to Step 8

8

  1. Disconnect connector C200 at the steering column.
  2. Connect a J 39200 DMM between connector C200, pin E9 for the pigtail wire of CKT 16 (PPL), and pin A6 for the pigtail wire of CKT 15 (DK BLU).
  3. Place the turn signal switch in the right turn position.

Is continuity present?

--

Go to Step 9

Go to Step 10

9

Repair the open in CKT 15 (DK BLU) between connector C200 and splice S237.

Are the turn signal lamps operative?

--

Go to Exterior Lights System Check

Go to Step 10

10

Repair the open in the pigtail wire of CKT 15 (DK BLU) in the steering column.

Are the turn signal lamps operative?

--

Go to Exterior Lights System Check

Go to Step 11

11

Replace the turn signal switch (part of the multi-function lever).

Are the turn signal lamps operative?

--

Go to Exterior Lights System Check

--