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New FBH Pump - no joy! Error 88h Fault
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Martin
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Member Since: 06 Nov 2004
Location: Hook Norton
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Wales 2006 Discovery 3 TDV6 SE Manual Buckingham BlueDiscovery 3

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 Wink
 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
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Post #19230336th Mar 2018 1:14 pm
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jonathanrichards
 


Member Since: 11 Jan 2018
Location: Hull
Posts: 75

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

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?
  
Post #19230386th Mar 2018 1:26 pm
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Martin
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Member Since: 06 Nov 2004
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Wales 2006 Discovery 3 TDV6 SE Manual Buckingham BlueDiscovery 3

Daniele has posted all the info required Smile

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! 
 
Post #19230436th Mar 2018 1:36 pm
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jonathanrichards
 


Member Since: 11 Jan 2018
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United Kingdom 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Hmm... I'm confused.

So this is the image from CRWOODY https://www.disco3.co.uk/forum/topic70824.html

http://www.disco3.co.uk/gallery/albums/use...G_0317.jpg

Seems to show a couple of connectors behind the wheel well, one of which carry the blue/white wire to the pump?
  
Post #19230526th Mar 2018 1:44 pm
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Martin
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Member Since: 06 Nov 2004
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Wales 2006 Discovery 3 TDV6 SE Manual Buckingham BlueDiscovery 3

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 Smile
 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know! 
 
Post #19230536th Mar 2018 1:47 pm
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jonathanrichards
 


Member Since: 11 Jan 2018
Location: Hull
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United Kingdom 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

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?
  
Post #19230686th Mar 2018 2:03 pm
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Martin
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Wales 2006 Discovery 3 TDV6 SE Manual Buckingham BlueDiscovery 3

08 and 07 are the same for this Thumbs Up

Yes only one connector pair in the lines.
 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know! 
 
Post #19230696th Mar 2018 2:04 pm
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jonathanrichards
 


Member Since: 11 Jan 2018
Location: Hull
Posts: 75

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

OK - when the weather improves, I'll get underneath again and break out the multimeter!
  
Post #19230726th Mar 2018 2:05 pm
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conman69
 


Member Since: 11 Aug 2012
Location: Norfolk
Posts: 398

England 2007 Discovery 3 TDV6 GS Manual Java BlackDiscovery 3

Jonathan,

Any photos of relevance which could assist others would be a massive help (thinking of myself Whistle ) as I maybe checking this route out before purchasing a pump if required.

Good luck with the issue and hope you get sorted Thumbs Up
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Post #19231316th Mar 2018 4:38 pm
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jonathanrichards
 


Member Since: 11 Jan 2018
Location: Hull
Posts: 75

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

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...
  
Post #19231486th Mar 2018 5:20 pm
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Narpy
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2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

Did you get anywhere with this problem?
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Post #192482010th Mar 2018 10:04 pm
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jonathanrichards
 


Member Since: 11 Jan 2018
Location: Hull
Posts: 75

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Not yet. Just waiting for the weather to improve to get underneath again! This week I hope:
  
Post #192491711th Mar 2018 12:52 pm
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jonathanrichards
 


Member Since: 11 Jan 2018
Location: Hull
Posts: 75

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

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??
  
Post #192857920th Mar 2018 8:11 pm
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zinke
 


Member Since: 22 Feb 2014
Location: Scunthorpe
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2006 Discovery 3 TDV6 S Manual Zermatt SilverDiscovery 3

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 Thumbs Up

Pete.
 IID, webasto software and workshop facility's available.  
Post #192860320th Mar 2018 9:13 pm
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jonathanrichards
 


Member Since: 11 Jan 2018
Location: Hull
Posts: 75

United Kingdom 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

No codes!
  
Post #192860920th Mar 2018 9:24 pm
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