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2001 Pontiac Grand Am fog lights

Tiny
JOEY729
  • MEMBER
  • 2001 PONTIAC GRAND AM
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 10,100 MILES
My fog light do not work at all not even the switch lights up when clicking on I checked the fuse shows power I even changed the relay I also check the wires that connect to the switch shows no power what else can I do
Saturday, March 20th, 2010 AT 2:58 PM

12 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
If there is power to the fuse, but nothing at the switch that is normal.The switch sends a ground signal to the Body Control Module, who then turns on the relay to light them up.Be sure the black/white wire at the switch has a good ground.The orange wire should go to ground when switch is on, if not the switch may be bad


https://www.2carpros.com/forum/automotive_pictures/1639_new_pa1_1.jpg

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Monday, March 22nd, 2010 AT 7:41 AM
Tiny
JOEY729
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I know the switch will not have power but I tested the connector that goes to the switch No power
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Monday, March 22nd, 2010 AT 9:01 AM
Tiny
2CARPRO JACK
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Thw switch supplies ground to signal the BCM to turn on the fog light relay, when the relay turns on, the power goes to the switch simply for the light to let you know it is on or off. The pic I supplied shows which wires should have ground and power
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Monday, March 22nd, 2010 AT 9:22 AM
Tiny
JOEY729
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Ok well I jumped the connector to the switch nothing does not work
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Monday, March 22nd, 2010 AT 9:44 AM
Tiny
2CARPRO JACK
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You did what? If you look at teh wiring diagram I posted, you can see how the system works. The Switch sends a ground signal to turn on the lights to the BCM, then the BCM sends a ground to the fog lamp relay to turn it on, which sends power out to the lights.
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Monday, March 22nd, 2010 AT 2:32 PM
Tiny
JOEY729
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I mean I used a wire from the battery postive to the connector and it does light up sorry I missed typed before so would that mean obvisouly the switch is bad?
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Monday, March 22nd, 2010 AT 2:38 PM
Tiny
2CARPRO JACK
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No. Do you have a test light or meter? You need to look at the wiring diagram. Power is only sent to the switch to illuminate the light. It gets power when the relay truns on from the ground signal sent by the BCM. Take your test wire and hook one end to ground, connect the other end to the orange wire at the switch
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Monday, March 22nd, 2010 AT 8:36 PM
Tiny
JOEY729
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  • 44 POSTS
Instrument lights are not working now the dimmer switch works for all the other things that use the light its just the instrument panel part could that be a fuse? Or relay?>
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Monday, March 22nd, 2010 AT 8:42 PM
Tiny
2CARPRO JACK
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Fuse possibly. Dont apply power to anything else
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Monday, March 22nd, 2010 AT 9:13 PM
Tiny
JOEY729
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Ok but all the other lights work inside its just the speedo lights and rpm lights the switch lights work radio lights work the ac heater light works thats why I asked
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Monday, March 22nd, 2010 AT 9:22 PM
Tiny
2CARPRO JACK
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Then it is probably the bulbs if everything else works
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Monday, March 22nd, 2010 AT 11:21 PM
Tiny
N7SNU
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  • 6 POSTS
This thread is kind of old but still good, it helped me. I had the same problem and was able to solve it using the information here. The problem was the relay! You could hear it clicking when you flipped the switch. However, the lights still would not come on. I pulled the relay and opened it to have a look at the contacts. They were a mess, junk all over them, I cleaned the contacts and and put the relay back in and everything works fine.
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Tuesday, September 24th, 2013 AT 11:01 AM

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