V8S Fogs not working

V8S Fogs not working

Author
Discussion

bicycleRepairMan

Original Poster:

41 posts

60 months

Sunday 23rd May 2021
quotequote all
Hi All

My front and rear fog lights don't work (I bought the car knowing they didn't work)

Since both front and rear have failed, I was hoping it was something simple and common to both sets of lights, like a blown fuse, but I've pulled all the fuses I can find in the passenger foot well, and all are good. I've stuck a multimeter across the rear lights, and all are good.

Any thoughts where to look next? Dash off and get to the switches?

Many Thanks

Ian

LucyP

1,738 posts

66 months

Sunday 23rd May 2021
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Bulbs?

Steve_D

13,796 posts

265 months

Sunday 23rd May 2021
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They are completely different circuits so no common fault.
I would suspect the switches. If the car is a new purchase then it is likely it has not seen much use. I would spend 10 minutes switching them on and off and see if they come to life. Also the rears go through 1 or more relays so they could also be sticky.

Steve

phillpot

17,279 posts

190 months

Sunday 23rd May 2021
quotequote all


Power to all the front lights goes through connector blocks near the bonnet hinges. Due to their location these are notorious for corroding.


The plugs that connect onto the rear lamp bulb holders are not brilliant, if they've been knocked around (they are better protected in their original home, a Ford Escort) there may be a poor connection.

Do you have a test lamp or a multi meter? If not it will be money well spent for sorting electrical issues.

bicycleRepairMan

Original Poster:

41 posts

60 months

Sunday 23rd May 2021
quotequote all
Hi All

Thanks for the suggestions. The rear fog is now working - it was just the headlight stalk needed cleaning up! The front fogs can wait until next weekend - they're not an MOT requirement (Tuesday!) - but I'll definitely check the front connectors...

Cheers

Ian


v8s4me

7,264 posts

226 months

Sunday 23rd May 2021
quotequote all
The fault is almost certainly the connector blocks mentioned above by Phillpot, unless.........you do know the fogs only come on with high beam don't you? That is the way mine is wired anyway but of course they are all different thumbup

GreenV8S

30,481 posts

291 months

Monday 24th May 2021
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v8s4me said:
The fault is almost certainly the connector blocks mentioned above by Phillpot, unless.........you do know the fogs only come on with high beam don't you? That is the way mine is wired anyway but of course they are all different thumbup
Mine too - they're wired like driving lamps, not foglamps. Wired by idiots - although there's a perfectly good relay in the circuit, for some reason TVR saw fit to take the full current through the switch.

Oldred_V8S

3,727 posts

245 months

Monday 24th May 2021
quotequote all
GreenV8S said:
v8s4me said:
The fault is almost certainly the connector blocks mentioned above by Phillpot, unless.........you do know the fogs only come on with high beam don't you? That is the way mine is wired anyway but of course they are all different thumbup
Mine too - they're wired like driving lamps, not foglamps. Wired by idiots - although there's a perfectly good relay in the circuit, for some reason TVR saw fit to take the full current through the switch.
Mind too

bicycleRepairMan

Original Poster:

41 posts

60 months

Tuesday 1st June 2021
quotequote all
Thanks for all the info - the connector blocks just needed a good cleanup and they're all working now...

Cheers

Ian