GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Exterior Lights System Check?

--

Go to Step 2

Go to Exterior Lights System Check

2

Turn the hazard flashers ON.

Do the hazard flashers operate?

--

Go to Step 3

Go to Step 4

3

  1. Turn the hazard flashers OFF.
  2. Place the ignition switch in the RUN position.
  3. Disconnect the turn/hazard switch (part of C201).
  4. Connect a test lamp J 35616-200 from CKT 139 (PNK) cavity A2 at connector C201 to ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

4

  1. Disconnect the turn/hazard flasher module.
  2. Turn the hazard flashers ON.
  3. Connect a test lamp J 35616-200 from CKT 1508 (LT BLU) cavity H9 at the turn/hazard flasher module to ground.

Does the test lamp light?

--

Go to Step 9

Go to Step 10

5

  1. Reconnect the turn/hazard switch.
  2. Turn the hazard flashers OFF.
  3. Turn the turn signal switch to the LEFT TURN position.
  4. Use a test lamp J 35616-200 in order to backprobe from connector C201 CKT 1508 (LT BLU) cavity A3 to ground.

Does the test lamp light?

--

Go to Step 7

Go to Step 8

6

Repair the open in CKT 139 (PNK) from connector C201 to the instrument panel fuse block.

Is the repair complete?

--

Go to Exterior Lights System Check

--

7

Repair the open in CKT 1508 (LT BLU) between the turn/hazard switch and splice S218.

Is the repair complete?

--

Go to Exterior Lights System Check

--

8

Replace the turn signal switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering.

Is the replacement complete?

--

Go to Exterior Lights System Check

--

9

Connect a test lamp J 35616-200 from CKT 550 (BLK) cavity G8 to CKT 1508 (LT BLU) cavity H9 at the turn/hazard flasher module.

Does the test lamp light?

--

Go to Step 13

Go to Step 14

10

Inspect for an open in CKT 1508 (LT BLU) from the turn/hazard flasher module to the turn/hazard switch.

Did you find an open?

--

Go to Step 11

Go to Step 12

11

Repair the open in CKT 1508 (LT BLU) from the turn/hazard flasher module to the turn/hazard switch.

Is the repair complete?

--

Go to Exterior Lights System Check

--

12

Replace the turn/hazard switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering.

Is the replacement complete?

--

Go to Exterior Lights System Check

--

13

  1. Reconnect the turn/hazard flasher module.
  2. Use a test lamp J 35616-200 in order to backprobe from C201 CKT 16 (PPL) cavity E9 to ground.

Does the test lamp flash?

--

Go to Step 8

Go to Step 15

14

Repair the open in CKT 550 (BLK) between the turn/hazard flasher module and ground G105.

Is the repair complete?

--

Go to Exterior Lights System Check

--

15

Use a test lamp J 35616-200 in order to backprobe from the turn/hazard flasher module CKT 16 (PPL) cavity H7 to ground.

Does the test lamp light?

--

Go to Step 16

Go to Step 17

16

Repair the open in CKT 16 (PPL) from the turn/hazard flasher module to the turn/hazard switch.

Is the repair complete?

--

Go to Exterior Lights System Check

--

17

Replace the turn/hazard flasher module.

Is the replacement complete?

--

Go to Exterior Lights System Check

--