Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18573
At the pump:
The black should have continuity to vehicle ground.
The white with blue should have continuity to the 8 pin connector, pin 5.
How the FBH drives the pump does not affect the continuity of the wires 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
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6th Mar 2018 12:14 pm
jonathanrichards
Member Since: 11 Jan 2018
Location: Hull
Posts: 152
That was my logic.
Do you know the route of the cables back from the pump up to the FBH?
It seems there's a connector behind the OSF wheel arch liner?
6th Mar 2018 12:26 pm
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18573
Daniele has posted all the info required
There is a connector set in both lines - C2374C/C2373R. This is, as in Daniele's pics, behind the battery against the bulkhead.
White/Blue (supply) goes via pin 2.
Black (ground) goes via pin 1.06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
6th Mar 2018 12:36 pm
jonathanrichards
Member Since: 11 Jan 2018
Location: Hull
Posts: 152
Seems to show a couple of connectors behind the wheel well, one of which carry the blue/white wire to the pump?
6th Mar 2018 12:44 pm
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18573
Different model year. You have a 2007 model year according to your profile, crwoody's is a 2006.
Various connectors were moved during the change to 2007 model year.
These differences is why the site asks for the year in your profile, it helps get the right info out 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know!
6th Mar 2018 12:47 pm
jonathanrichards
Member Since: 11 Jan 2018
Location: Hull
Posts: 152
It's actually a 2008 model (profile amended just now!) Sorry.
But now I think I understand.
So from the back of the FBH to the harness break just behind the battery. Then uninterrupted until the connector of the pump?
6th Mar 2018 1:03 pm
Martin Site Admin and Owner
Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18573
08 and 07 are the same for this
Yes only one connector pair in the lines.06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
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6th Mar 2018 1:04 pm
jonathanrichards
Member Since: 11 Jan 2018
Location: Hull
Posts: 152
OK - when the weather improves, I'll get underneath again and break out the multimeter!
6th Mar 2018 1:05 pm
conman69
Member Since: 11 Aug 2012
Location: Norfolk
Posts: 431
Jonathan,
Any photos of relevance which could assist others would be a massive help (thinking of myself ) as I maybe checking this route out before purchasing a pump if required.
Good luck with the issue and hope you get sorted Discovery3 TDV6 GS
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6th Mar 2018 3:38 pm
jonathanrichards
Member Since: 11 Jan 2018
Location: Hull
Posts: 152
So here's a plot twist for you.
Looking under the bonnet at the routing of the FBH wiring. I see that the connector and loom with the Blue/White fuel pump trigger wire in it, comes out of the FBH and runs down to the front of the engine bay down by the coolant reservoir and then disappears out of view.
Similar to the pic you uploaded and I've highlighted it in blue.
Click image to enlarge
So not towards the back of the battery bay!
So where on earth does it go now?
Answers on a post card...
6th Mar 2018 4:20 pm
Narpy
Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830
Did you get anywhere with this problem?Mods:
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FBH Remote Control
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Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
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I'm not scared, I'm outta here.
10th Mar 2018 9:04 pm
jonathanrichards
Member Since: 11 Jan 2018
Location: Hull
Posts: 152
Not yet. Just waiting for the weather to improve to get underneath again! This week I hope:
11th Mar 2018 11:52 am
jonathanrichards
Member Since: 11 Jan 2018
Location: Hull
Posts: 152
So the weather is improving and today I finally managed to get under the car again without getting snowed on or wet.
I did further continuity testing and tracing of the fuel pump power supply wiring back into the main transmission loom.
Incidentally, the wiring from the pump back to the heater goes back into the transmission harness and back to the engine compartment.
I was hoping to find a broken wire or chaffing of the pump wiring before it joined to large transmission harbess, but after a little testing with a piercing probe on a multimeter, I couldn’t find an issue.
So, in short, I can’t find a wiring problem to the fuel pump, but there’s simply no continuity back to the heater control multi connector and the pump.
So to stop faffing around, a ran a couple of new wires from the heater, down alongside the loom underneath the near side wheel arch, and back to the fuel pump.
I then joined these to the fuel pump wiring and then one to the back of the heater multi connector and one to the earth wires next to the heater.
So now the fuel pump has power and earth. And it works.
So that’s good.
After plugging in my laptop through the diagnostic loom and OBD adapter, I can now start the heater.
HOWEVER
The heater starts, begins to heat, then after about 30 seconds, stops and begins a cooling cycle.
There’s smoke coming out so I presume that there is combustion happening and that must mean that fuel is getting into the heater, but it just stops then cools.
I even tried to support combustion by blowing the wife’s hairdryer down the intake, but that didn’t seem to make a difference.
So, any clues anyone please??
20th Mar 2018 7:11 pm
zinke
Member Since: 22 Feb 2014
Location: Scunthorpe
Posts: 584
If it’s trying to start now you have the pump wiring sorted but stopping after 30 seconds, there will be some new fault codes for you have a look at
Pete.IID, webasto software and workshop facility's available.
20th Mar 2018 8:13 pm
jonathanrichards
Member Since: 11 Jan 2018
Location: Hull
Posts: 152
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
) as I maybe checking this route out before purchasing a pump if required.
