GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Set the turn signal switch to the right turn position.
  2. Observe the operation of the right turn signal indicator on the instrument cluster.

Does the right turn signal indicator flash?

--

Go to Step 2

Go to Step 9

2

  1. Keep the turn signal switch in the right turn position.
  2. Disconnect the harness connector from the right front turn lamp assembly.
  3. Connect a test lamp between terminal  A and terminal B on the right front turn lamp harness connector.

Does the test lamp flash?

--

Go to Step 3

Go to Step 4

3

Repair the open in right front park and turn lamp assembly.

Is the repair complete?

--

System OK

--

4

Connect a test lamp between terminal A and the chassis ground on the right front turn lamp connector.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

5

Repair the open in CKT 150 (BLK) between S105 and terminal B in the right front turn lamp harness connector.

Is the repair complete?

--

System OK

--

6

  1. Disconnect the front chassis harness connector C105.
  2. Connect a test lamp between terminal C and terminal D in the front chassis harness connector C105.

Does the test lamp flash?

--

Go to Step 7

Go to Step 8

7

Repair the open in CKT 15 (DK BLU) between terminal C in the front turn signal harness connector C105 and terminal A in the right front turn and park lamp harness connector.

Is the repair complete?

--

System OK

--

8

Repair the open in CKT 15 (DK BLU) between S 335 and terminal C in the front chassis harness connector C105.

Is the repair complete?

--

System OK

--

9

  1. Disconnect the harness connector from the turn/hazard flasher module.
  2. Remove the right turn trailer relay from the socket.
  3. Connect a DMM between terminal 86 in the right trailer turn relay socket and terminal 3 in the turn/hazard flasher module harness connector.

Does the DMM indicate continuity?

--

Go to Step 10

Go to Step 11

10

  1. Keep the turn signal switch in the right turn position.
  2. Connect a DMM between terminal 8 in the turn/hazard flasher module harness connector and the chassis ground.

Does the DMM indicate continuity?

--

Go to Step 12

Go to Step 13

11

Repair the open CKT 139 (DK BLU) between S335 and terminal 1 in the turn/hazard flasher module harness connector.

Is the repair complete?

--

System OK

--

12

Replace the turn/hazard flasher module.

Is the repair complete?

--

System OK

--

13

  1. Keep the DMM connected.
  2. Disconnect the harness connector C1 from the multifunction switch.
  3. Remove the chassis ground connection from the DMM.
  4. Connect the DMM to terminal 7 in the multifunction switch harness connector.

Does the DMM indicate continuity?

--

Go to Step 14

Go to Step 15

14

Replace the multifunction switch.

Is the repair complete?

--

System OK

--

15

Repair the open in CKT 133 (BLU/ORN) between the multifunction switch and the turn/hazard flasher module.

Is the repair complete?

--

System OK

--