Light warning light on dash.

[zaskar]

2007 Hymer B class / Ducato 3.0

First run out in new to us van and I get a warning light on dash. Fiat manual is saying exterior bulb blown.......or about to blow. Cheers, last bits handy! Checked all lights but all seems working? Any ideas please chaps?
Ta

 

[meanders]

Corrosion in a fitting causing high resistanc I expect. Remove each bulb, a good squirt of contact cleaner (Not WD40), insert and remove the bulb several times.

 

[pappajohn]

Don't see how it knows a bulb is about to blow.....unless it's something to do with resistance.

 

[Landy Andy]

Check your number plate lights.
My warning was an old side light bulb.

 

[dazandandrea]

As above , if nothing has blown its more than likely corrosion in one of the bulb sockets.. systematically remove bulbs and clean everything up.
Had the same in ours

^{_{Subscribers  do not see these advertisements}}

 

[zaskar]

Brilliant! Thanks so much guys. Got a week at destination to check each socket. Good call on the number plate light. Forgot to check that but I do know "Henry"s had an advisory 2 years running on that and dealer reconed he'd sorted it. I'll see when we stop for the night tonight.
Thanks all

 

[zaskar]

Brilliant! Thanks so much guys. Got a week at destination to check each socket. Good call on the number plate light. Forgot to check that but I do know "Henry"s had an advisory 2 years running on that and dealer reconed he'd sorted it. I'll see when we stop for the night tonight.
Thanks all

Ps. How peed off am I sat here typing this when Mrs Zaskar is having a ball driving us up the M6........ It's MY toy ,

 

[meanders]

Call in at a Toolstation or Screwfix or similar to get Contact Cleaner if you do not already have some.

 

[Winger]

Is there some issues with fitting LED’s that the system cannot recognise and thinks there is a duff bulb. Maybe someone has fitted some LED’s?

 

[zaskar]

RESOLVED. Following your advice (thanks guys) I removed each and every bulb for a clean / squirt of the good stuff. Although suspecting a rear light cluster as I had a similar problem on my 5th wheel, I started with marker lights, then side yellow lights and eventually rear clusters. Soon as I cleaned up the rear R/H cluster, the warning light went out. Not a hard job, just time consuming but satisfying.
Incidentally, based on past experience, I used Wurth 2040 on all the bulbs and fittings as that is what cured my 5ver.

^{_{Subscribers  do not see these advertisements}}

 

[Mike800966]

Generally speaking the system will measure the current on different circuits. This includes the cable, lampholder as well as the lamp itself. (Bulbs go in the garden) At its simplest its the lh compared to the rh bulbs. A bulb about to blow often draws a different current from a happy bulb altough they might appear to be similar brightness.

Thats what brings up the warning light.
Modern systems detect that a lamp may have been changed to led from filament with same effect
Mike