Fog lights!

jonnyf90 · Mar 8th, 2016, 05:28

Hi guys - Need help quickly, so bear with me!

I had the pleasure of my alternator belt snapping on the way to work yesterday. After a bit of squeeling - PING! Cue christmas tree dashboard.
Anyway, I still had 18 miles to work, so I switched off the dipped beams and went to use sides + fogs.
Found out fogs weren't working.
Dippeds went back on and I made it to work. Picked up a new belt at lunch, fitted it after work and after a jump, drove home.

I checked fuse 7 for front and rear fogs and it's fine. I have the combined front/rear switch and there is a short flash of green (fronts), then it goes out again. No rear fogs either, and no dashboard repeater.
There's still an audible click from the relay tray, but I still removed the ashtray and checked the relay to make sure it wasn't loose.
Not loose, but hot. VERY hot. Strange, since the fogs switch has been off there shouldn't be any load on it. As far as I could tell, it wasn't burnt out, and was still "clicking" with switch operation.
It's the metal "K" type.

Anyone had a "hot" relay before? Is this causing the problem?

Cheers
Jonny

mantee78 · Mar 8th, 2016, 07:44

The reason of hot relay is too high power on it, I think. It can be because of burned/overheated/tarnished contacts or overheated wires or loose wires or you may using higher power bulbs than oem?
Bypass the relay with piece of wire and then check for lights - the easiest way to diagnose relay's fault.

Some more detailed instructions how to check the relay:
http://www.howacarworks.com/accessor...a-relay-switch

jonnyf90 · Mar 8th, 2016, 07:54

Bulbs are OEM 55W H3s so no problem there. Only thing that's bothering me in the green indicator on the switch shows for a fraction of a second then goes out.
Even if the front fog relay is shot, it shouldn't affect the rear fog as it's an independent relay? All bulbs are ok as well.

Mar 8th, 2016, 05:28	#1
jonnyf90 Grumpy git born too late! Last Online: Mar 20th, 2024 01:04 Join Date: Jul 2014 Location: Between Derby & Nottingham	Fog lights! Hi guys - Need help quickly, so bear with me! I had the pleasure of my alternator belt snapping on the way to work yesterday. After a bit of squeeling - PING! Cue christmas tree dashboard. Anyway, I still had 18 miles to work, so I switched off the dipped beams and went to use sides + fogs. Found out fogs weren't working. Dippeds went back on and I made it to work. Picked up a new belt at lunch, fitted it after work and after a jump, drove home. I checked fuse 7 for front and rear fogs and it's fine. I have the combined front/rear switch and there is a short flash of green (fronts), then it goes out again. No rear fogs either, and no dashboard repeater. There's still an audible click from the relay tray, but I still removed the ashtray and checked the relay to make sure it wasn't loose. Not loose, but hot. VERY hot. Strange, since the fogs switch has been off there shouldn't be any load on it. As far as I could tell, it wasn't burnt out, and was still "clicking" with switch operation. It's the metal "K" type. Anyone had a "hot" relay before? Is this causing the problem? Cheers Jonny __________________ 1997 965 2.5 SE Manual 1996 944 Classic 2.3 LPT - SOLD/BROKEN/SCRAPPED 1997 S90 3.0 - SOLD to doingitsideways 2021 Škoda Octavia Estate L iV PHEV (Company)

Mar 8th, 2016, 07:44	#2
mantee78 Senior Member Last Online: Dec 31st, 2016 15:41 Join Date: Mar 2016 Location: Tuxford	The reason of hot relay is too high power on it, I think. It can be because of burned/overheated/tarnished contacts or overheated wires or loose wires or you may using higher power bulbs than oem? Bypass the relay with piece of wire and then check for lights - the easiest way to diagnose relay's fault. Some more detailed instructions how to check the relay: http://www.howacarworks.com/accessor...a-relay-switch Last edited by mantee78; Mar 8th, 2016 at 07:47.

Mar 8th, 2016, 07:54	#3
jonnyf90 Grumpy git born too late! Last Online: Mar 20th, 2024 01:04 Join Date: Jul 2014 Location: Between Derby & Nottingham	Bulbs are OEM 55W H3s so no problem there. Only thing that's bothering me in the green indicator on the switch shows for a fraction of a second then goes out. Even if the front fog relay is shot, it shouldn't affect the rear fog as it's an independent relay? All bulbs are ok as well. __________________ 1997 965 2.5 SE Manual 1996 944 Classic 2.3 LPT - SOLD/BROKEN/SCRAPPED 1997 S90 3.0 - SOLD to doingitsideways 2021 Škoda Octavia Estate L iV PHEV (Company)

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