Technical Strange fog light behaviour Panda 100HP

[Pandadoodoo]

Hi all,

Looking for some Fiat wisdom from you lovely people.

I can only get one front fog to work at a time, voltage is reading from both connectors independently but only one lamp will illuminate.

This behaviour follows regardless of left or right fog. They both light up independently but only if there is one bulb connected.

I'm thinking grounding issue but i cant see anything obvious.

Also worth mentioning these are standard halogen lamps and i've confirmed they are both working.

Any help massively appreciated.

 

[DaveMcT]

Run a temporary ground wire to each light from the battery negative.

 

[Pandadoodoo]

Run a temporary ground wire to each light from the battery negative.

Great shout

 

[koalar]

On the scuttle area there will either be a small black earthing box

Or an ring eyelet

Depending on year

Unbolt And clean both sides up

If it's the box type also unplug the wires and see if there is any corrosion

Or

 

[Pandadoodoo]

On the scuttle area there will either be a small black earthing box

Or an ring eyelet

Depending on year

Unbolt And clean both sides up

If it's the box type also unplug the wires and see if there is any corrosion

View attachment 476722
Or
View attachment 476723

On the scuttle area there will either be a small black earthing box

Or an ring eyelet

Depending on year

Unbolt And clean both sides up

If it's the box type also unplug the wires and see if there is any corrosion

View attachment 476722
Or
View attachment 476723

Every day is a school day! weekend fettling incoming. Cheers