GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Test the operation of the stoplamps.

Do the stoplamps operate?

--

Go to Step 5

Go to Step 2

2

  1. Disconnect the harness connector from the right rear stop and turn lamp assembly.
  2. Connect a DMM between terminal E in the right rear stop and turn lamp connector and the chassis ground.

Does the DMM indicate continuity?

--

Go to Step 3

Go to Step 4

3

  1. Disconnect the harness connector from the turn/hazard flasher module.
  2. Connect a test lamp between terminal 9 of the turn/hazard flasher module harness connector and the chassis ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

4

Repair the open in CKT 150 (BLK) the ground circuit between G405 and S402.

Is the repair complete?

--

System OK

--

5

  1. Set the turn signal switch to the left turn position.
  2. Disconnect the harness connector from the multifunction switch.
  3. Connect a DMM between terminal 6 of the multifunction switch and the chassis ground.

Does the DMM indicate continuity?

--

Go to Step 7

Go to Step 8

6

Repair the open in CKT 110 or CKT 131 (ORN) between circuit breaker 25 and the turn/hazard flasher module harness connector.

Is the repair complete?

--

System OK

--

7

Replace the turn/hazard flasher module.

Is the repair complete?

--

System OK

--

8

Replace the multifunction switch.

Is the repair complete?

--

System OK

--