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Old 09-26-2010, 06:00 PM   #1
taylorjonesphoto
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Default Driver's side foglight not working (97 OBS)

Hey guys, I've tried doing a little research and using the search but not finding much for answers relating to my specific problem.

When i bought my car only the passenger side foglight would turn on, I just assumed that the driver's side bulb was burnt out. I ordered some HELLA YellowStars to replace the old bulbs.

The driver's side bulb will still not turn on.

I pulled apart the assembly again to make sure everything was plugged in properly and everything looked correct. I checked what I believe to be the right fuse however the labeling on the fusebox wasn't very descriptive so there's a possibility I didn't check the right fuse.

I've seen at least 3 other posts about this particular issue and none of them had any resolution in their posts. I'm an electrical n00b and not much of a wrench monkey so I'm quite perplexed.

Thoughts?
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Old 10-01-2010, 03:22 PM   #2
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does anyone have any input on this?
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Old 10-05-2010, 03:26 PM   #3
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the rainy season is coming and i want to fix this issue before then!
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Old 10-05-2010, 03:45 PM   #4
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Get a wiring diagram and check for continuity from the light backwards and make sure you were checking the correct fuse(s). If you do not have a multimeter or short spotter now would be the time to get one. I know this might not seem like much help but not being there makes chasing down electrical gremlins next to impossible.
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Old 10-08-2010, 12:00 PM   #5
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where is a good source for wiring diagrams? i did a search and didn't come up with a whole lot, also didn't see any stickies about it.
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Old 10-08-2010, 01:48 PM   #6
aoscjs
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i just went to walmart bought driving lights ($20) then to amazon.com and HID conversion ($40) then there they were bitchin bright fog lights for around $60 lol and super easy to install and no problems and work great in fog, rain, and snow and mean people who bright light me
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Old 10-11-2010, 12:05 PM   #7
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Quote:
Originally Posted by aoscjs View Post
i just went to walmart bought driving lights ($20) then to amazon.com and HID conversion ($40) then there they were bitchin bright fog lights for around $60 lol and super easy to install and no problems and work great in fog, rain, and snow and mean people who bright light me
i'm guessing this is your solution to my problem? otherwise i hardly see how this is relevant haha.
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Old 10-11-2010, 12:42 PM   #8
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check the ground wire. Normally the fogs are grounded individually. Are you getting full voltage at the socket?
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Old 10-11-2010, 04:48 PM   #9
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Quote:
Originally Posted by jonklein611 View Post
check the ground wire. Normally the fogs are grounded individually. Are you getting full voltage at the socket?

i need to grab a battery for my multimeter to check. when i put the bulbs in i assembled them exactly as they were which included putting the ground wire around one of the screws that goes into the light assy. the only thing i can think of is that there seperate fuses for each side which seems illogical or that something is disconnected on the way up to the switch.
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Old 10-11-2010, 04:55 PM   #10
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OH! I can't believe I didn't mention this before. when i disassembled the light in question there was what looked like corrosion around the bulb and it had a white powder in the lens and in the weatherproof back piece.
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Old 10-12-2010, 07:28 AM   #11
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Quote:
Originally Posted by taylorjonesphoto View Post
OH! I can't believe I didn't mention this before. when i disassembled the light in question there was what looked like corrosion around the bulb and it had a white powder in the lens and in the weatherproof back piece.
clean that stuff off and get yourself some fog light grease (i'm not joking) it's the little $0.99 packets @ advanced. It will keep the connections from corroding. sounds like the resistance of the crud is too high and sapping the light of the voltage it needs.
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Old 10-12-2010, 08:48 AM   #12
taylorjonesphoto
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Quote:
Originally Posted by jonklein611 View Post
clean that stuff off and get yourself some fog light grease (i'm not joking) it's the little $0.99 packets @ advanced. It will keep the connections from corroding. sounds like the resistance of the crud is too high and sapping the light of the voltage it needs.
Haha the guys at autozone always try to sell me that crap!
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Old 10-27-2010, 08:15 PM   #13
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I busted out my meter and sure enough both lights are getting power. Now I'm stumped.
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Old 10-27-2010, 08:31 PM   #14
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Quote:
Originally Posted by aoscjs View Post
i just went to walmart bought driving lights ($20) then to amazon.com and HID conversion ($40) then there they were bitchin bright fog lights for around $60 lol and super easy to install and no problems and work great in fog, rain, and snow and mean people who bright light me
there's a reason people shine their brights at you - you're running illegal HIDs in ****ing Wal-Mart driving lights.

OP, don't listen to this idiot.

Pull your bumper and look for electrical problems - the wiring tester is a good idea, too.
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Old 10-27-2010, 08:32 PM   #15
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Quote:
Originally Posted by taylorjonesphoto View Post
I busted out my meter and sure enough both lights are getting power. Now I'm stumped.
you coulda fried another bulb. Switch the two around - you probably have a grounding problem or a short somewhere.
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Old 10-28-2010, 07:14 AM   #16
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Quote:
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you coulda fried another bulb. Switch the two around - you probably have a grounding problem or a short somewhere.
Or super high resistance somewhere. Check how many ohms you have between your relay and the bulb socket.
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Old 10-28-2010, 12:10 PM   #17
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Quote:
Originally Posted by jonklein611 View Post
Or super high resistance somewhere. Check how many ohms you have between your relay and the bulb socket.
will definitely check this out. what is a normal amount of ohms?
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Old 10-28-2010, 12:15 PM   #18
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Quote:
Originally Posted by taylorjonesphoto View Post
will definitely check this out. what is a normal amount of ohms?
For just wire it should be fairly low (i'd say less than 5 ohms give or take). One problem I had is one of the connections to the relay went bad and wasn't making a good connection between the relay and the wire, it was like 20-30 ohms. A general rule of thumb is the resistance across the bulb should be more than the resistance of the wiring.


If the wire has more resistance than the bulb, it's basically "stealing" the power from the bulb, and there isn't enough to get the light to ignite.
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