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TopQ1967

Member Since: 14 Feb 2012
Location: Veghel
Posts: 236

2012 Defender 130 Puma 2.2 HCPU Buckingham Blue

Power to the electric in tank fuel pump.

I still don't get fuel pressure on my low pressure fuel line. Thought it was the pump so took it out. However it seems no power gets at the pump.

I checked:

The fuel pump relay. It has power and klicks.
F1 15 amp fuse it has power.

At the pump side the brown/white shows no power.

In the box (where the relay's are. I checked the outgoing cable. It showed no power. This is the first cable at the front side. I traced the cable and see it goes out in the second outlet again.

Where is it going? As I presumed it went straight to the relays. But something goes wrong between the relays and this second outlet.

No power on the fuelpump conector. (brown/white)

Click image to enlarge

This is the connector to the second outlet. But it is the incomming power to the first outlet that runs to the rear (fuelpumppower).

Click image to enlarge

22nd May 2017 12:48pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

test your relay

Click image to enlarge

22nd May 2017 2:45pm

TopQ1967

Member Since: 14 Feb 2012
Location: Veghel
Posts: 236

Hi Mr. Smith

I swapped the relay.

and expected power on D

What i see is the cables go out on exit 2 from the relaybox and come in true the same hole. Than a connector plugs in to the loom that runs to the rear.

I expect the driver signal to the relays comes from the ECU and only comes there if it has passed the alarm. Or is the alarm after the relais?

22nd May 2017 7:33pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

relay coil signal is + from fuse and neg from ECM only as the 10AS signal go through instilment cluster to he ECM only if you go to start engine is relay pulling in

brown and slat Gray wire (D) runs in loom to fuel pump in the tank

if you remove relay and bridge between too brown and slat Gray wires will pump run

23rd May 2017 7:29am

TopQ1967

Member Since: 14 Feb 2012
Location: Veghel
Posts: 236

I found out that it is an earthing problem at the pump side.
Can't find where it is earthed, but I think at the gearbox.

Thank you for your help

23rd May 2017 12:36pm

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

C1964-1 right hand side gearbox.

to C0114 fuel pump connector

23rd May 2017 12:46pm

TopQ1967

Member Since: 14 Feb 2012
Location: Veghel
Posts: 236

Thank you very much!

It was still lose after a transferbox overhaule...

I have now to fix the parts I broke!.. Grrr.

Regards

Q.

23rd May 2017 1:33pm

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