Fog light issue
Thread Starter
Drifting
Joined: May 2008
Posts: 1,490
Likes: 17
From: Oakville, Ontario
Fog light issue
Question;
1998 C5 vert, stock fog lights are not working, the light on the switch was working for months, it is now out when switched on, so neither is working now. Finally got at it this morning, assumed the fuse, however the fuse looks good, got another one at the dealer, still does not work, nor does the light on the switch. I know the stock fogs don't throw much light, I just want everything to be working. Assuming #6 fuse (10 amp) if I am reading the manual properly.
Any thoughts?
Thanks in advance
1998 C5 vert, stock fog lights are not working, the light on the switch was working for months, it is now out when switched on, so neither is working now. Finally got at it this morning, assumed the fuse, however the fuse looks good, got another one at the dealer, still does not work, nor does the light on the switch. I know the stock fogs don't throw much light, I just want everything to be working. Assuming #6 fuse (10 amp) if I am reading the manual properly.
Any thoughts?
Thanks in advance
Tech Contributor
Joined: Jan 2004
Posts: 20,032
Likes: 299
From: Wylie TX --> Less is More, except under the hood !
Verify power out of micro relay 39.
If the relay is bad then you will not get a power light on your button inside the car as well as no lights.
Second thought is that the grounding of both fog lights is located at a small grounding block just above the pass wheel well (underhood)... just in front of the engine coolant tank. Take it apart and clean all the grounding connections.
Toque
If the relay is bad then you will not get a power light on your button inside the car as well as no lights.
Second thought is that the grounding of both fog lights is located at a small grounding block just above the pass wheel well (underhood)... just in front of the engine coolant tank. Take it apart and clean all the grounding connections.
Toque
Veteran
Joined: Jan 2000
Posts: 2,082
Likes: 1
From: Louisville KY
Verify power out of micro relay 39.
If the relay is bad then you will not get a power light on your button inside the car as well as no lights.
Second thought is that the grounding of both fog lights is located at a small grounding block just above the pass wheel well (underhood)... just in front of the engine coolant tank. Take it apart and clean all the grounding connections.
Toque
If the relay is bad then you will not get a power light on your button inside the car as well as no lights.
Second thought is that the grounding of both fog lights is located at a small grounding block just above the pass wheel well (underhood)... just in front of the engine coolant tank. Take it apart and clean all the grounding connections.
Toque
My 98 fog lights sometimes would come on and other times they wouldn't. The instrument panel lights were doing the same thing. I cleaned the two grounds G101 & G102 that Toque referred to. They are located on the frame on the front inside corner of the windshield washer tank and the front inside corner of the coolant tank. They are black. Take them off and take them apart to clean.
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Brett Foote
Team Owner
Joined: May 1999
Posts: 22,830
Likes: 13
From: Columbus Ohio
CI 3-4, 8-9-10 Veteran
St. Jude Donor '06-'08-'10
My fog lights died last fall and I didn't worry about it until this spring.
Here's a very quick test that I used to discover my issue.
Step 1
Step 2
Worked for me.
Here's a very quick test that I used to discover my issue.
Step 1
- Walk out to the car
- Honk the horn
- Assuming it works go to step 2
- If it doesn't then you have more than one issue
Step 2
- Open under hood fuse box and swap mini relay # 39 with mini relay # 36 (They're the same part number)
- Honk the horn
- If it works you'll have to keep digging
- If the horn doesn't work then go pickup a new relay and you're done.
Worked for me.
