GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 1998 🢒 Grand Am 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Fog Lamps Inoperative - All

Step

Action

Value(s)

Yes

No

1

Did you perform the Daytime Running Lamps (DRL) System Check?

--

Go to Step 2

Go to Daytime Running Lights (DRL) System Check

2
  1. Disconnect the fog lamp relay.
  2. Connect a test lamp between terminal 30 and ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 19

3

Connect a fused jumper between terminal 30 and terminal 87.

Do the fog lamps light?

--

Go to Step 4

Go to Step 20

4
  1. Turn the headlamp switch to the PARK position.
  2. Turn the fog lamp switch on.
  3. Connect a test lamp between terminal 85 of the fog lamp relay and ground.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

5
  1. Connect the fog lamp relay.
  2. Disconnect the isolation relay.
  3. Connect a test lamp between terminal 87A and ground.

Does the test lamp light?

--

Go to Step 8

Go to Step 9

6

Test CKT 317 for an open.

Did you find an open in CKT 317?

--

Go to Step 21

Go to Step 7

7

Replace the fog lamp switch.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

8

Repair a short to B+ in CKT 11. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

9

With the headlamp switch in the PARK position and the fog lamp switch turned on, connect a test lamp between terminal 30 of the fog lamp relay and ground.

Does the test lamp light?

--

Go to Step 10

Go to Step 11

10

With the headlamp switch in the PARK position and the fog lamp switch turned on, connect a test lamp between terminal 30 and terminal 87 of the fog lamp relay.

Does the test lamp light?

--

Go to Step 13

Go to Step 14

11

Test CKT 1317 for an open.

Did you find an open in CKT 1317?

--

Go to Step 22

Go to Step 12

12

Replace the fog lamp relay. Refer to Fog Lamp Relay Replacement .

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

13
  1. With the headlamp switch in the PARK position, turn the ignition switch to the RUN position.
  2. Connect a test lamp between terminal 85 and ground.

Does the test lamp light?

--

Go to Step 15

Go to Step 16

14

Repair an open in CKT 150. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Daytime Running Lights (DRL) System Check

--

15

Test for an open in CKT 592.

Did you find an open in CKT 592?

--

Go to Step 17

Go to Step 18

16

Repair an open in CKT 41. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

17

Repair an open in CKT 592. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

18

Replace the isolation relay.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

19

Repair an open in CKT 740. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

20

Repair an open in one of the following CKTs; Refer to Wiring Repairs in Wiring Systems:

    • CKT 34
    • CKT 150
    • CKT 250

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

21

Repair an open in CKT 317. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--

22

Repair an open in CKT 1317. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

--

Go to Daytime Running Lights (DRL) System Check

--