I can see that the pump is fed from pin 5 of the 7 pin socket on the FBH, so my first task is to check voltages there and also see if there is a reasonable resistance that you would associate with a motor. Then see if I can make the pump work independently of the FBH by applying 12v on that wire.
I'm making an assumption that that is the 'dosing' pump!
12th Jan 2018 10:32 am
Member Since: 15 Jan 2016
can't see the diagram ATM
just ensure you aren't confusing the pin numbers for the water pump and fuel pump.
12th Jan 2018 1:09 pm
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Pin 5 is the fuel pump but it is a solenoid dosing pump not a motor. Apply 12V in pulses and listen for the pump ticking. It doesn't whirr with constant voltage unlike a typical car fuel pump.06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
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