Fog lamps don't work, and it's not the bulbs or fuse...
02-07-2005, 04:12 PM
#1
Burning Brakes
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Fog lamps don't work, and it's not the bulbs or fuse...
The interior foglamp switch doesn't light up when I turn it on and the neither foglamps turn on when I lock or unlock the car. At first I thought it was the fuse, but when I checked the fuse in the fusebox under the hood it was still good. What else can it be? I haven't checked the interior fuse box because it doesn't show anything related to the foglamps (as far as I can see). This is really bugging me. Any help would be much appreciated.
02-07-2005, 04:46 PM
#2
Race Director
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St. Jude Donor '06-'07-'08-'09-'10-'11-'12
The switch itself, might be bad. Pull the switch and check the wires with a volt meter, with the lights on.
02-07-2005, 08:22 PM
#3
Burning Brakes
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Originally Posted by screw991le
The switch itself, might be bad. Pull the switch and check the wires with a volt meter, with the lights on.
02-09-2005, 05:43 AM
#5
Tech Contributor
Did you do the obvious idiot check first...the fogs won't come on if the turn signal lever is pushed into the 'brights' position 
You can use the link to the fog light schematics in this post to help out your troubleshooting.
http://forums.corvetteforum.com/showthread.php?t=672365
You can use the link to the fog light schematics in this post to help out your troubleshooting.
http://forums.corvetteforum.com/showthread.php?t=672365
02-09-2005, 09:20 AM
#6
Burning Brakes
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Originally Posted by markcz
Did you do the obvious idiot check first...the fogs won't come on if the turn signal lever is pushed into the 'brights' position
You can use the link to the fog light schematics in this post to help out your troubleshooting.
http://forums.corvetteforum.com/showthread.php?t=672365
You can use the link to the fog light schematics in this post to help out your troubleshooting.
http://forums.corvetteforum.com/showthread.php?t=672365
Yup, did the idiot check
. Thanks for the link, though. Hopefully that will help me find the problem.
02-09-2005, 09:45 AM
#7
Tech Contributor
One thing you should be aware of, the fog light on/off switch is just a momentary contact. The contacts are only closed while you are holding down the button.
Let us know what you find.
Let us know what you find.
02-09-2005, 12:51 PM
#8
Melting Slicks
Check the foglight relay, located in the fusebox next to the battery. Swap the fog relay with an identical looking neighbor. They pull out, straight up, some are very tight. You caould also have a second person see if it clicks when you push the foglight switch (engine off, key in RUN position)
02-09-2005, 03:10 PM
#9
Burning Brakes
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I checked the relay in the fusebox next to the battery and it seemed to be fine (did not look burned out), but I didn't switch it with another to make totally sure. The mystery continues....
02-10-2005, 02:26 AM
#10
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Originally Posted by tk97
I checked the relay in the fusebox next to the battery and it seemed to be fine (did not look burned out), but I didn't switch it with another to make totally sure. The mystery continues....
Same here with my rear fog light. Checked everything using the wiring diagram and the service manual. Ended up with the sentence: change BCM.
The BCM grounds the indicator light and it grounds the relay.
So I bought a new BCM and went to the dealer. He connected the TechII and found out, that the fogs were programmed out. Two clicks on his TechII and everything was fine again.
Maybe you give this a try.
Frederik
PS: Have a brandnew BCM for sale
02-10-2005, 02:45 AM
#11
Burning Brakes
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Originally Posted by C5 Frederik
Same here with my rear fog light. Checked everything using the wiring diagram and the service manual. Ended up with the sentence: change BCM.
The BCM grounds the indicator light and it grounds the relay.
So I bought a new BCM and went to the dealer. He connected the TechII and found out, that the fogs were programmed out. Two clicks on his TechII and everything was fine again.
Maybe you give this a try.
Frederik
PS: Have a brandnew BCM for sale
The BCM grounds the indicator light and it grounds the relay.
So I bought a new BCM and went to the dealer. He connected the TechII and found out, that the fogs were programmed out. Two clicks on his TechII and everything was fine again.
Maybe you give this a try.
Frederik
PS: Have a brandnew BCM for sale
02-10-2005, 04:29 AM
#12
Tech Contributor
Originally Posted by tk97
Thanks for the tip, but I already found the problem. It seems to be a faulty connection with the switch itself, just like markcz suggested. It works now so I don't want to touch it. However, if it does it again I might have to buy a new switch. Thanks to everyone for all the replies.
Hopefully it will be OK, but if you have to replace the switch itself the GM part number is 12135155. It's $31.83 + S/H at GMPD, or $56 + tax at your local dealer.
02-10-2005, 07:49 PM
#13
Burning Brakes
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Originally Posted by markcz
Hopefully it will be OK, but if you have to replace the switch itself the GM part number is 12135155. It's $31.83 + S/H at GMPD, or $56 + tax at your local dealer.
