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

  1. Disconnect the turn/hazard flasher connector.
  2. Connect a test lamp between terminal 2 and ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3

  1. Turn ON the hazard lamps.
  2. Connect a 20 amp fused jumper between terminal 2 and terminal 3.

Do the hazard lamps flash?

--

Go to Step 5

Go to Step 6

4

Test CKT 140 for a short to ground or an open. Repair if necessary. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

5

Replace the turn/hazard flasher.

Is the repair complete?

--

Go to Exterior Lights System Check

--

6

Test CKT 27 for an open.

Did you find an open in CKT 27?

--

Go to Step 7

Go to Step 8

7

Repair the faulty circuit. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

8

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

Is the repair complete?

--

Go to Exterior Lights System Check

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