2001 Pontiac Grand Am fog lights

Tiny
JOEY729
  • MEMBER
  • 2001 PONTIAC GRAND AM
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 101,000 MILES
Fog lights do not work not even the little light on the fog switch goes on I changed the relay fuse is ok and new switch I jumped the the wires behind the relay than the fog lights came on what step buy step procedure to see what is excatly causing the lights not to come on
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Saturday, April 3rd, 2010 AT 6:45 PM

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Tiny
JACK42
  • MEMBER
3 wires behind the switch? One should be ground, 1 should be power (only to turn on thelighted switch, the other wire goes to the BCM (Body Control Module)to tell it to turn them on. If you jumped one ground straight to the signal wire and they came on, you may just have a bad switch. Do you have a meter to test for continuity to ground on the one wire and power on the other?If ground is good, and the one wire has power, the other should ground when switch is turned on, if not the switch is bad
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Sunday, April 4th, 2010 AT 9:33 AM
Tiny
JOEY729
  • MEMBER
Well I was saying behind the relay I jumped the two out of the 4 wires and the lights came on and stayed untill I took the jumpers out as for the switch ITS A NEW SWITCH I tried connecting a wire to the postive battery to one of the wires behind the switch it light up
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Sunday, April 4th, 2010 AT 9:43 AM
Tiny
JACK42
  • MEMBER
Did you test for ground like I suggested? If you applied power to the BCM you may have damaged it. Try swapping that relay for another one just to see if it will work
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Sunday, April 4th, 2010 AT 10:14 AM
Tiny
JOEY729
  • MEMBER
No I did not apply power to the bcm I applied power to the wire behind the switch to see if it works and it light up the test light as for behind the relay I took out the relay tested it work great I used a fused jumper wire and connect to the two behind the relay the fog lights than came on so how do I test for ground?
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Sunday, April 4th, 2010 AT 10:21 AM
Tiny
JACK42
  • MEMBER
With a meter set to Ohms
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Monday, April 5th, 2010 AT 12:28 PM
Tiny
JOEY729
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So what excatly do I do to test the ground? Behind the fog light switch its self>?
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Monday, April 5th, 2010 AT 12:43 PM
Tiny
JACK42
  • MEMBER
The black wire with the white tracer is the ground wire. Use a meter to check continuity to ground.(Set on ohms and put one end on good ground other probe the wire)When you tun on the fog lamp switch it connects the ground to the orange wire which is the signal to the BCM to turn on the relay
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Monday, April 5th, 2010 AT 4:01 PM
Tiny
JOEY729
  • MEMBER
I already got a new switch a new relay and fuse is ok what I am saying is I took the relay out and I jumped the 2 slots behind the relay and the fog lights came on so what other procedures I checked the fog light plugs I hooked to negative battery and to the sockey on the fog lights the test light did not light those are the things I did so far I what other procedure can I do?
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Monday, April 5th, 2010 AT 6:51 PM
Tiny
JACK42
  • MEMBER


http://www.2carpros.com/forum/automotive_pictures/1639_grand_am_1.jpg

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Monday, April 5th, 2010 AT 10:48 PM
Tiny
JACK42
  • MEMBER


http://www.2carpros.com/forum/automotive_pictures/1639_grand_am_1.jpg

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Monday, April 5th, 2010 AT 10:49 PM
Tiny
JACK42
  • MEMBER


http://www.2carpros.com/forum/automotive_pictures/1639_grand_am_1.jpg


Here is the wiring diagram for the fog lights.The orange wire is signal out to the BCM (Ground) to turn the lights on.The Dark Green and white wire at the relay is the trigger to turn on the lights from the BCM, it should turn to ground when the switch is on.If not you need to test the orange wire for ground with switch on to see if the wire is good.The purple wire at relay goes hot when relay is on the other two wires at the relay should have power
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Monday, April 5th, 2010 AT 10:49 PM
Tiny
JOEY729
  • MEMBER
Ok when I test the orange wire if no ground what does that mean? And give me a few days to check it since I am at work and all I will give you outcome on all this
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Tuesday, April 6th, 2010 AT 8:18 AM
Tiny
JACK42
  • MEMBER
If the orange doesnt go ground, the blk/white wire at switch may have a bad connection to ground. If orange goes ground with switch on, test the dark green/white wire at the relay to see if it is grounded.
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Tuesday, April 6th, 2010 AT 12:32 PM
Tiny
JOEY729
  • MEMBER
Ok I have to take the relay out to check that green and white wire correct and if that does not show a good ground does that mean the bcm could be bad?
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Tuesday, April 6th, 2010 AT 12:37 PM
Tiny
JACK42
  • MEMBER
If the orange wire is grounding too. It is the signal to tell the BCM to turn the relay on. To be absloutlety sure you will need to locate the BCM to verify the orange wire is good to it
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Tuesday, April 6th, 2010 AT 7:59 PM
Tiny
JOEY729
  • MEMBER
Ok I know where the bcm is how do I tell if the bcm is telling the lights to go on LOL but I will do the procedures you have told me and will defintly update on what happened just give me a little time as I said because of work and all
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Tuesday, April 6th, 2010 AT 8:47 PM
Tiny
JACK42
  • MEMBER
If the BCM tells the relay to turn on, the Dark green/white wire will become ground
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Tuesday, April 6th, 2010 AT 9:19 PM
Tiny
JOEY729
  • MEMBER
Ok I let you know what happens for sure I just hope its not the bcm there so expensive and a used one is a very risky thing because it has to be excat same thing and reprogrammed is there anyway to open up the bcm lol?
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Tuesday, April 6th, 2010 AT 9:26 PM
Tiny
JACK42
  • MEMBER
Nope.
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Wednesday, April 7th, 2010 AT 7:42 AM
Tiny
JOEY729
  • MEMBER
That sucks well I will let you know excatly what happens with testing the wires and hopefully its not the bcm there is a way to go directly with out the relay
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Wednesday, April 7th, 2010 AT 8:22 AM

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