Technical Weird problem, flashing rear light

[Fiat Ducato Motorhome]

Hi
I am looking for some advice to sort out a fault on my rear near side light cluster. Whilst indicating the other bulbs flash too, especially the rear light bulbs. Am I right in thinking this is an earth problem.

There was a blown bulb which I removed, replaced the bulb and applied Electrical cleaner to all the terminals at the rear. But it is still doing it. Any ideas how to fix this fault please as I have an MOT in May and this will cause a fail.

Many thanks
Paul

 

[rolopolo]

Take out both rear lamps, the wiring loom connector to bulb holder

One of the end terminals will most probably be corroded/melted

Open up block connector and clean up the terminal and crimp closed (heat build up opens it up) also clean the male pin on bulb holder.

Check the bulbs and where they seat in holder also for corrosion

Once all cleaned and crimped back together replace and check

Do both sides

I sprayed white grease into block connector to keep water out, worked for me on my 07 van

The above was common in early x250's 07 >


Basically the earth connection is not good enough, resistance builds and moisture get in adding to resistance and shorting out

The terminal opens up, creating more heat and eventually melts the block connector

 

[rolopolo]

The above is based on the original van lamps/loom

 

[shotgun]

Sounds like a bad earth