V6 Xantia (Activa) fuel pump, voltage feed problem.

[Stickyfinger]

I seem to be only getting 6/6.8volt feed to my pump and it is not running.

have checked the pump with a 12 volt feed, it runs
Have probed the wires (before and after a splice), it still outputs 6/6.8volts
Have switched the relays in the ECU box, it still outputs 6/6.8volts in the wires/plug

Not sure which wires are which at the relay or where they run down the car.

[CitroJim]

Alasdair, Circuit diagrams and harness diagrams for an RHD MK1

http://www.eastment.net/XanWD/ES9J4mk1injcct.jpg

http://www.eastment.net/XanWD/ES9J4mk1injhar.JPG

http://www.eastment.net/XanWD/ES9J4mk1injloc.JPG

I hope they are more or less applicable to the LHD one...

The harness diagram should help you nail down where the volts are being lost.

[Stickyfinger]

Cheers Jim.

Will check it all out tomorrow.....

On the plus side the AX is now all taxed and insured and was used for the Tesco run tonight

[Zelandeth]

Have you got a good 12V to the relay when it's closed?

I had issues with voltage sag like this once and it turned out to be a duff fuse (dodgy plating meant it had oxidised badly).

[Stickyfinger]

Not a clue atm, I do not know what wires feed the relay or what wires go from the relay to the pump. The trouble is I am totally rubbish at electrics, quite a dumb ass in reality.

[xantia_v6]

An easy place to start might be the inertia switch, which seems to be connected between the relay and the fuse.

[Stickyfinger]

The one (cut off, red top) under the bonnet hinge ?

[xantia_v6]

The one (cut off, red top) under the bonnet hinge ?

Yes

[Stickyfinger]

Ta....will do in the morning.

[Stickyfinger]

All fixed, a fault at the fuse box/relay feed, changed the fuse box "module" (with all the blade-fuse connections on) and all OK now, starts and runs fine.

Thanks for the help guys.

[CitroJim]

Alasdair, excellent news