GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Did you perform the Headlight System Check?

--

Go to Step 2

Go to Headlight System Check

2

Is the RH headlamp inoperative?

--

Go to Step 4

Go to Step 3

3

Is the LH headlamp inoperative?

--

Go to Step 12

Go to Headlight System Check

4

Are both low and high beams of the RH headlamp inoperative?

--

Go to Step 5

Go to Step 8

5

Using a J 35616-200 unpowered test lamp, backprobe connector C1, cavity 2 of fuse block 1.

Did the test lamp light?

--

Go to Step 6

Go to Step 7

6

Repair the open WHT/RED wire between connector cavity 3 of the RH headlamp and connector C1, cavity 2 of fuse block 1. Refer to Wiring Repairs in Wiring systems.

Is the repair complete?

--

Go to Headlight System Check

--

7

Replace fuse block 1.

Is the repair complete?

--

Go to Headlight System Check

--

8

Is the RH low beam inoperative?

--

Go to Step 9

Go to Step 10

9

Repair the open RED/WHT wire between cavity 2 of the RH headlamp connector and S243. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Headlight System Check

--

10

Is the RH high beam inoperative?

--

Go to Step 11

Go to Headlight System Check

11

Repair the open RED wire between cavity 1 of the RH headlamp connector and S244. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Headlight System Check

--

12

Are both low and high beams of the LH headlamp inoperative?

--

Go to Step 13

Go to Step 15

13

Using a J 35616-200 unpowered test lamp, backprobe connector C1, cavity 3 of fuse block 1.

Did the test lamp light?

--

Go to Step 14

Go to Step 7

14

Repair the open WHT/BLU wire between connector cavity 3 of the LH headlamp and connector C1, cavity 3 of fuse block 1. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Headlight System Check

--

15

Is the LH low beam inoperative?

--

Go to Step 16

Go to Step 17

16

Repair the open RED/WHT wire between cavity 2 of the RH headlamp connector and S243. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Headlight System Check

--

17

Is the LH high beam inoperative?

--

Go to Step 18

Go to Headlight System Check

18

Repair the open RED wire between cavity 1 of the RH headlamp connector and S244. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Headlight System Check

--