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 hazard flasher connector.
  2. Measure the voltage to ground at the hazard flasher connector terminal B (ORN).

Is the voltage within the specified range?

10-15 V

Go to Step 3

Go to Step 5

3

  1. Set the turn/hazard switch to HAZARD.
  2. Connect a fused jumper between the hazard flasher connector terminal B (ORN) and terminal A (BRN).

Do all of the turn lamps light?

--

Go to Step 4

Go to Step 6

4

Replace the hazard flasher.

Is the repair complete?

--

Go to Exterior Lights System Check

--

5

Repair the open or the short to ground in CKT 140 (ORN). Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

6

Test CKT 27 (BRN) for an open or a short to ground. Refer to Testing for Continuity or Testing for Short to Ground in Wiring Systems.

Is CKT 27 OK?

--

Go to Step 7

Go to Step 8

7

Replace the turn/hazard switch assembly.

Is the repair complete?

--

Go to Exterior Lights System Check

--

8

Repair the suspect wiring. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

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