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FBH easy mod
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shaun1991
 


Member Since: 09 Mar 2016
Location: tuscany
Posts: 8

Italy 2005 Discovery 3 TDV6 S Auto Zambezi SilverDiscovery 3
FBH easy mod

Hi,

I am looking to put a feed to the Fbh so i can turn it on before i start the engine.

i have read about all the mods that are available but i am interested in putting a feed the red wire in pin number 2, i have done this but nothing happens. i am only interested in putting a simple on off switch, nothing fancy.

i need it sorting urgently as i am going in the mountains at high altitude and i want to preheat the engine as the glow plugs aren't working properly.

thanks in advance
  
Post #175326024th Dec 2016 8:13 am
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Robbie
 


Member Since: 05 Feb 2006
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

I understand that you have read all about it, but what exactly are you feeding to pin 2?
 Land Rover - Turning Drivers into Mechanics Since 1948

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Post #175326124th Dec 2016 8:16 am
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shaun1991
 


Member Since: 09 Mar 2016
Location: tuscany
Posts: 8

Italy 2005 Discovery 3 TDV6 S Auto Zambezi SilverDiscovery 3

Positive feed, is this correct?
  
Post #175326324th Dec 2016 8:21 am
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anglefire
 


Member Since: 09 Mar 2010
Location: In the Club House
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England 

Pin 2 is a communications port that "speaks" W-bus protocol. Shoving 12v up there is at best not going to work at worst blow the circuit board.

What makes you think that it would work given the plethora of after market kits to do this job and not one simple switch? Whistle
 Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500

_________________________________________________
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Post #175326624th Dec 2016 8:29 am
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Robbie
 


Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

Indeed. Applying a live voltage to a databus connection was unwise. You need to read more about the FBH and how vehicle components talk to each other before attempting anything else.

Idea
 Land Rover - Turning Drivers into Mechanics Since 1948

Battery & Quiescent Current Drain Testing

Diagnostics for:
Defender, FL2, D3, D4, Evoque, RRS & FFRR
A not-for-profit enterprise


 
 
Post #175326824th Dec 2016 8:33 am
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shaun1991
 


Member Since: 09 Mar 2016
Location: tuscany
Posts: 8

Italy 2005 Discovery 3 TDV6 S Auto Zambezi SilverDiscovery 3

So it isn't possible to put a simple switch, i only want to know that
  
Post #175327424th Dec 2016 8:53 am
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10464

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

I think if a "simple mod." was possible it would have been widely promulgated by now.

NJSS
 Am I Gammon or Woke ? - I neither know nor care.

2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
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Post #175327524th Dec 2016 8:54 am
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Robbie
 


Member Since: 05 Feb 2006
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

shaun1991 wrote:
So it isn't possible to put a simple switch, i only want to know that


No.

Just what did you read about the FBH that made you think applying 12v to pin 2 - hopefully nothing on this site?
 Land Rover - Turning Drivers into Mechanics Since 1948

Battery & Quiescent Current Drain Testing

Diagnostics for:
Defender, FL2, D3, D4, Evoque, RRS & FFRR
A not-for-profit enterprise


 
 
Post #175327624th Dec 2016 9:08 am
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Narpy
 


Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830

2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

Shaun, I don't know what you've been reading but you appear to have misunderstood almost entirely.

You need to read this: http://media.disco3.co.uk/gallery/albums/u...20v1-1.pdf and get your head around the fact you need to develop a WBus signal using an appropriate method and feed that into pin 2 on the Webasto.
Early ideas were to use an 1533 oval timer to develop the signal but there are now other methods and techniques that do the same thing. There's also a few different methods of switching your WBus on and these also need studying to decide which method is best for you.

It may seem complex but it is pretty simple once you realise the WBus issue. Wink
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Post #175327724th Dec 2016 9:12 am
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beanie
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Member Since: 12 Mar 2011
Location: In the garage messing with something
Posts: 14336

England 2013 Discovery 4 3.0 SDV6 GS Auto Fuji WhiteDiscovery 4

Shaun, you have a pm Thumbs Up
 Altox GSM FBH controller thread


IID Pro MV License - D3, D4 & RRS - Enabling, Updates, D4 & RRS Timed / Remote Climate, D4 Bluetooth fitting
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D4 & RRS style D3 grilles made to order
  
Post #175327924th Dec 2016 9:14 am
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Narpy
 


Member Since: 18 Jul 2011
Location: Stockport
Posts: 7830

2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

Ha ha, never one to miss out on a seasonal sale Greg. Whistle
 Mods:
Front Fogs + Halos
FBH Remote Control
The 1st Ever RRS Modded Grill
Garmin Nuvi + D4 Surround + Reversing Camera.
D4 Steering Wheel.
Rear Boot Spoiler.
Twin Brake Lights.
Wing Mirror Indicator Repeaters.
Long Roof Rails
Make your own Narpy grill thread
I'm not scared, I'm outta here. 
 
Post #175328224th Dec 2016 9:20 am
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beanie
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Member Since: 12 Mar 2011
Location: In the garage messing with something
Posts: 14336

England 2013 Discovery 4 3.0 SDV6 GS Auto Fuji WhiteDiscovery 4

Got to be sharp to get in before someone else Whistle
 Altox GSM FBH controller thread


IID Pro MV License - D3, D4 & RRS - Enabling, Updates, D4 & RRS Timed / Remote Climate, D4 Bluetooth fitting
PM me for details




Owner of the original "Beanie" grille
D4 & RRS style D3 grilles made to order
  
Post #175328924th Dec 2016 9:37 am
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dgardel
 


Member Since: 03 Nov 2009
Location: Greater Venice
Posts: 2025

Italy 2014 Discovery 4 3.0 SDV6 XXV LE Auto Santorini BlackDiscovery 4

On the Thermo Top V it is technically possible, but I never tried on the D3/4, but it works on the Mate's Ford Galaxy with Thermo Top V

See the first picture



if you put +12V on pin 1 of the FFBH connector X1 the heater switch ON and it stays ON as long as there are 12V on pin (same as the ThermoTop C/P family).



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Post #175339824th Dec 2016 3:22 pm
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anglefire
 


Member Since: 09 Mar 2010
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England 

Are you sure? I only say that because the timer also has what looks like a w-bus line to pin 2.
 Mark.
2006, D3 SE Auto - gone but not forgotten.
2014 BMW 530d M Sport Tourer.
1977 Triumph Spitfire 1500

_________________________________________________
Disco Picture Website Here 
 
Post #175340624th Dec 2016 3:34 pm
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Gazellio
 


Member Since: 08 Jan 2011
Location: Chilterns
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United Kingdom 2009 Discovery 4 TDV6 SE Auto Indus SilverDiscovery 4

Can this be confirmed?
  
Post #175341724th Dec 2016 3:59 pm
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