RE: Fog lamp wiring harness

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RE: Fog lamp wiring harness

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RE: Fog lamp wiring harness - 10/11/2007 7:28:17 PM

swartlkk

Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

The fog lights are restricted to being on only when the low beams are on. So as soon as you switch to high beams, the fogs will turn off. This is controlled in the BCM (body control module) and as far as I know is not able to be changed without rewiring the supply voltage to the fog switch.

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Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to otnietdehoooo)

Post #: 21

RE: Fog lamp wiring harness - 10/11/2007 9:45:15 PM

cain_45

Posts: 54
Joined: 9/24/2007
Status: offline

Well the switch isn't lighting up. And the fogs do not come on whether the low or high beams are on or if just the parking lamps are on. One thing I did notice is that the right hand side marker illuminates very dim. I've changed the bulb and it still only comes on very dim. Think maybe a ground is off or not connected correctly?

(in reply to swartlkk)

Post #: 22

RE: Fog lamp wiring harness - 10/12/2007 2:42:37 AM

drperry

Posts: 3896
Joined: 1/12/2007
From: GP AB CA
Status: offline

It could be a ground issue, but also, check to make sure you have the relay and fuses under the hood, for the fog lamps...

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Post #: 23

RE: Fog lamp wiring harness - 10/12/2007 5:10:09 AM

cain_45

Posts: 54
Joined: 9/24/2007
Status: offline

Any ideas on what the relay & fuse are at specifically in the fuse box? Diagram anyone?

(in reply to drperry)

Post #: 24

RE: Fog lamp wiring harness - 10/12/2007 5:39:48 AM

swartlkk

Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

Where the relays & fuses are? Have you looked in your owners manual or, maybe easier, on the covers for the two fuse boxes? The Fuse/Relay section of your owners manual starts on pg 5-88.

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Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to cain_45)

Post #: 25

RE: Fog lamp wiring harness - 10/15/2007 8:48:58 AM

cain45

Posts: 56
Joined: 6/13/2007
Status: offline

Anyone have a pic of the relay without foglamps and another with foglamps so I know exactly what I'm looking for?

(in reply to swartlkk)

Post #: 26

RE: Fog lamp wiring harness - 10/15/2007 2:04:15 PM

cain_45

Posts: 54
Joined: 9/24/2007
Status: offline

Ok so I replaced the relay today and still no fog lights. Ah Ha! I did find out that the BCM has to be programmed to recognize the fog light switch in cabin. So I'm going to have this done and I'll report back if I have fog lights at that time.

(in reply to cain45)

Post #: 27

RE: Fog lamp wiring harness - 11/5/2007 12:28:45 PM

cain45

Posts: 56
Joined: 6/13/2007
Status: offline

Just wanted to let the forum know that I now have factory fog lamps. I had to take it to the dealer and they had to contact GM tech support for a VCI code, they programmed it in and voila I have fog lamps.

(in reply to cain_45)

Post #: 28

RE: Fog lamp wiring harness - 11/5/2007 12:36:35 PM

swartlkk

Posts: 14308
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

I think I did warn you about having to have the BCM programmed... Or maybe not you, but someone else in a related thread.

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Kyle-

2004 Rainier
1970 Chevelle - Resto
1974 K5 Blazer - Resto

(in reply to cain45)

Post #: 29

RE: Fog lamp wiring harness - 11/5/2007 3:28:00 PM

drperry

Posts: 3896
Joined: 1/12/2007
From: GP AB CA
Status: offline

quote:

ORIGINAL: swartlkk

I think I did warn you about having to have the BCM programmed... Or maybe not you, but someone else in a related thread.

Out of curiosity, would I have to do the same for Cruise Control?

Since it's electronically controlled and all...

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Post #: 30

RE: Fog lamp wiring harness - 11/5/2007 5:43:58 PM

cain_45

Posts: 54
Joined: 9/24/2007
Status: offline

Hmm that one I don't know about. I'm getting ready to install a new steering wheel with audio controls so I'll let everyone know how that goes or what I have to go thru to make it work.

(in reply to drperry)

Post #: 31