GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Were you sent here from the Exterior Lights System Check?

--

Go to Step 2

Go to Exterior Lights System Check

2

Are the right and left turn signals inoperative?

--

Go to Step 3

Go to Step 16

3

  1. Turn the ignition switch to the ON position.
  2. Disconnect the turn/hazard flasher connector. Refer to Hazard and Turn Signal Flasher Replacement for access.
  3. Test for B+ at cavity 2 of the turn/hazard flasher connector using a J 39200 .

Is B+ measured at cavity 2 of the turn/hazard flasher connector?

--

Go to Step 4

Go to Step 7

4

Test for continuity between cavity 1 of the turn/hazard flasher connector and ground using a J 39200 .

Is there continuity in the WHT/BLK wire?

--

Go to Step 5

Go to Step 10

5

Test for continuity between cavity 3 of the turn/hazard flasher connector and cavity 2 of the turn signal/headlamp switch connector using a J 39200 .

Is there continuity in the GRN/WHT wire?

--

Go to Step 6

Go to Step 11

6

Replace the turn/hazard flasher. Refer to Hazard and Turn Signal Flasher Replacement .

Is the replacement complete?

--

Go to Exterior Lights System Check

--

7

  1. Disconnect connector C5 of junction block 2.
  2. Test for continuity between cavity 4 of connector C5 of junction block 2 and cavity 7 of the hazard switch using a J 39200 .

Is there continuity is the GRN/ORN wire?

--

Go to Step 8

Go to Step 14

8

Test for continuity between cavity 2 of the turn/hazard flasher 9 and cavity 5 of the hazard switch using a J 39200 .

Is there continuity in the GRN/RED wire?

--

Go to Step 9

Go to Step 15

9

Replace the hazard switch.

Is the repair complete?

--

Go to Exterior Lights System Check

--

10

Repair the open in the WHT/BLK wire between cavity 1 of the turn/hazard flasher and ground. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

11

Test for continuity between cavity 3 of the turn/hazard flasher connector and cavity 5 of connector C6 of junction block 1 using a J 39200 .

Is there continuity?

--

Go to Step 12

Go to Step 13

12

Repair the open between cavity 2 of the turn signal switch and cavity 5 of connector C6 of junction block 1. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

13

Repair the open between cavity 3 of the turn/hazard flasher and cavity 5 of connector C6 of junction block 1. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

14

Repair the open in the GRN/ORN wire between cavity 4 of connector C5 of junction block 2 and cavity 7 of the hazard switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

15

Repair the open in the GRN/RED wire between cavity 2 of the turn/hazard switch and cavity 5 of the hazard switch. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

16

Does the right turn signal operate?

--

Go to Step 18

Go to Step 17

17

Repair the open in the GRN/YEL wire between cavity 3 of the turn signal switch and cavity 10 of connector C6 of junction block 1. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--

18

Does the left turn signal operate?

--

Go to Exterior Lights System Check

Go to Step 19

19

Repair the open in the GRN/BLK wire between cavity 3 of the turn signal switch and cavity 10 of connector C6 of junction block 1. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Exterior Lights System Check

--