Hi ALL,

I HAVE A fiat ducato 3.0 160 multijet engine with 6 speed auto box, its a motorhome, today I drove home from aweekend away trouble free for over 100 miles, got home turned off engine, unloaded it, 20 mins later went to start it to move it, and it would not start.
With the help of the AA, we discovered a fuel delivery problem, the primary fuel pump in the fuel tank was not working, we checked all fuses, checked the inertia cut out switch, all seemed okay.
We found out that there was no live supply to the pump ?
What could this be ? I have no wiring diagram to trace the lead from the pump to its source.

Thoughts are,
faulty inertia switch, checked the earth lead for continuity, this was okay, when these fail do they break the earth or live connection to pump ? where does the pump get its supply from? is there another inline fuse anywhere ?

some guidance would be appreciated,
many thanks.

Hi
Do you have any form of immobiliser on the vehicle?

It sounds daft but if your vehicle locks from the key remote lock the vehicle leave for 2 minutes and unlock vehicle and try to start
This has happened to me on many vehicles I have owned over the years

hi, yes tried locking & unlocking a few times didnt help ?

thanks for that will try it again tomorow

But did you leave it for a while or lock unlock and try to start?
You need to leave it for 2 minutes after locking to allow it to activate and sort itself out
Or maybe disconnect battery for 2 minutes and try it may of just got its knickers in a twist

The inertia switch cuts out the earth (negative) to the pump when activated. That is pin 3 of connector D on the pump.

Hi did you manage to sort you problem