S40 Fog Light problems

sus1e · Jan 2nd, 2008, 11:29

Hi,

My 1999 S40 is playing silly monkeys with the fog lights.

If I press the fog light switch within the first 20 minutes of a journey they come on (light comes on the dash and the fog light come on). If I press the switch after 20 minutes the dash light and the fog lights don't work. This is really annoying as I hit the fog patches 30 minutes into my daily commute.....

I have my lights on properly (not on daylight running).

Any suggestions would be gratefully recieved!

hansol · Jan 2nd, 2008, 11:33

The first thing that springs to mind is the relay is on its way out.

sus1e · Jan 2nd, 2008, 11:38

This will sound like a stupid question - but where is the relay housed?
I will check it out and replace it incase it is that.

morphinemitt · Jan 3rd, 2008, 13:59

Try with the DRL's on, depending on what position your light switch is in the stalk/switches operate slightly differently.

sus1e · Sep 30th, 2008, 14:54

Hi,

My headlights are on the correct settings. I have recently checked the switch pack, bulbs and fuses - all ok.

So I am left with the relay and the harness as possible causes. Based on the fact that they occasionally work, I think it is probably a relay issue.

I also now know where my relays are.............. I just don't know which one is the correct one for the fog lights.

Any ideas as to which is the correct relay?

Jan 2nd, 2008, 11:29	#1
sus1e New Member Last Online: Jan 28th, 2009 08:53 Join Date: Jan 2008 Location: Derby	S40 Fog Light problems Hi, My 1999 S40 is playing silly monkeys with the fog lights. If I press the fog light switch within the first 20 minutes of a journey they come on (light comes on the dash and the fog light come on). If I press the switch after 20 minutes the dash light and the fog lights don't work. This is really annoying as I hit the fog patches 30 minutes into my daily commute..... I have my lights on properly (not on daylight running). Any suggestions would be gratefully recieved!

Jan 3rd, 2008, 13:59	#4
morphinemitt My nipper said! Last Online: Aug 1st, 2022 20:15 Join Date: Oct 2006 Location: Who knows?	Try with the DRL's on, depending on what position your light switch is in the stalk/switches operate slightly differently. __________________

Jan 2nd, 2008, 11:33	#2
hansol Junior Member Last Online: Oct 12th, 2010 22:20 Join Date: Jun 2007 Location: london	The first thing that springs to mind is the relay is on its way out.

Jan 2nd, 2008, 11:38	#3
sus1e New Member Last Online: Jan 28th, 2009 08:53 Join Date: Jan 2008 Location: Derby	This will sound like a stupid question - but where is the relay housed? I will check it out and replace it incase it is that.

Sep 30th, 2008, 14:54	#5
sus1e New Member Last Online: Jan 28th, 2009 08:53 Join Date: Jan 2008 Location: Derby	Hi, My headlights are on the correct settings. I have recently checked the switch pack, bulbs and fuses - all ok. So I am left with the relay and the harness as possible causes. Based on the fact that they occasionally work, I think it is probably a relay issue. I also now know where my relays are.............. I just don't know which one is the correct one for the fog lights. Any ideas as to which is the correct relay?

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