Rear fog light appearing on dash

[crazycup_racer]

Before i go digging into wiring checks etc this weekend, has anyone had the rear fog lamp appear when they press the brake pedal? It lights up fairly dim but all the brake lights etc work fine. It seems like a simple earthing fault but thought id ask here first.

It only happens when the headlights are switched on.

Thanks

 

[Sam]

Just started happening to me aswell in the snow.

Wonder whats up with it!

 

[crazycup_racer]

it also flickers while indicating left but not right!!

Hummmmmm, ill check it out when i get time and let you know if anyone else cant!!

 

[Hutchie]

corrosion on the rear light clusters

a bit of a clean up of the contacts on plugs and buld holders should sort it

 

[barnesautos]

Check the rear lamp cluster O/S/R for water damage and check the earth connections on the cluster

 

[Gaz_]

Yep, bad earthing on the rear clusters. My Cup did it. Good clean up should do the trick

 

[MK3]

When my hazzards are on the rear fog light indicator on the dash flashes, but fog lights stay off? Probably nothing to do with the problem your on about but wondered if anyone knew what could be causing it?

 

[chris182cup]

Mines does this, i cleaned bulb connectors sprayed with wd40 but it still happens when i break. Im going to try swapping the bulb connector things over from the left side to right if they will fit and if that doesnt work its a bad earth

 

[guysy]

WD40 the metal terminals. Wasnt the light earth or any corrosion on mine.

 

[Gaz_]

more the loom to track connector

 

[chris182cup]

Well i did the bulb connectors even used sandpaper get any rust off, i did clean the loom connector it looks as though one of the pins on connector is fucked a brown colour. It wouldnt bother me just the fog light coming on but when cruise control is on anytime i indicate it turns cruise control off which is a pain when over taking

 

[Paul RN]

Check the earth cable that runs down from the rear light cluster

 

[Missing Link]

Bad earth return..... Electricity will try always try and find a way of making a circuit.

In your case it's tracking back through the fog light circuit and the bringing the tell tale light on. ( It's a small wattage bulb and doesn't take much to bring it on )

You've bound to have seen Punto's and old Fords with disco lights at the back when indicating, Same thing, Just a worse case.

 

[cat171]

If you have a phase 1 & have put the phase 2 lights on it, that's most likely why. As said it's an earthing prob. I had it, sorted it by checking the wiring which had got lose, fixed it no probs.

 

[chris182cup]

Rite so your sayin its a bad earth? I checked mine looks fine, other threads have been made about this and people say they sorted it by cleaning connectors

 

[cat171]

Clean the connectors on the rear lights, not much else you can do tbh. That ought to sort it though.

 

[Missing Link]

There is an earth mounting stud inside the boot below the cluster under the carpet/trim. ( This gets wet & corrodes if the clusters / boot seal leaks )

Take off the nut & scuff up the ring terminal until it's clean and bolt it back up.

 

[Mostro]

I've had this again since the cold/snow and have seen this advice before.

corrosion on the rear light clusters

a bit of a clean up of the contacts on plugs and buld holders should sort it

Haven't had time to dismantle mine yet - is it one particular connection? is it obvious which is the problem? or is it just a case of cleaning and spraying everything in sight?

 

[Hutchie]

I've had this again since the cold/snow and have seen this advice before.





Haven't had time to dismantle mine yet - is it one particular connection? is it obvious which is the problem? or is it just a case of cleaning and spraying everything in sight?

i now have the same fault
baisically it just needs a good clean, salt and stuff gets in