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Disco 3 not starting when cold...advice on a fix please?
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10361

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

You could use this or thick robust speaker cable.

https://www.ebay.co.uk/itm/202862980807

Put the resistor where you think best.
Inside is out the weather.
But if you are soldering the wires under the bonnet, you may as well fit it there.
  
Post #219303510th Dec 2020 9:27 pm
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 329

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

Hi looks good to me I would use a click lock button then you only need one hand.
Click for on start the car click for off
  
Post #219308711th Dec 2020 8:08 am
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 329

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3

Merry Christmas.
I fitted my resistor by the switch.
If you remove the driver air vent you have loads of room to fit the switch and resistor all I did was make 2 wires with connectors on and solder the resistor in the middle the shrink wrap it.
If you want to try it just unplug the temp sender an pop the resistor in the plug turn the car on but don't start it and watch the temp gauge go up mine goes to just above the cold bit.
I have tried mine to -4 and it starts.
I would love for someone in a cold place to try it at a lower temp.
F
  
Post #219309011th Dec 2020 8:23 am
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

Pete K wrote:
Later models have the temperature sensor to the side. (by the air filter box)
Grey plug with white wire coming out.





The cheap/direct alternative to boiling the kettle is this:

Dobbo wrote:
Not sure about that - all I can say is I have put the 5 k resistor {across the temp sensor you boil, via a switch} in and bingo i have no issues now
I have fitted it to a horn type switch (pressed in - on and finger removed - off so as soon as the gauge rises up to just under half way I remove finger and start


Any videos on this please?
Is maybe not be professional, but its seam worth while switch addition to have.

Glowplugs can be replaced in the summer, should you wish. (£700 ish)

What we really need is an ECU map update to do this!
  
Post #21991745th Jan 2021 12:12 am
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

What wire type to use please?

Pete K wrote:
Live listings of relevant parts :

https://www.ebay.co.uk/itm/TE-CONNECTIVITY...4902.l9144


https://www.ebay.co.uk/itm/Blue-Off-On-Mom...4902.l9144
  
Post #21991775th Jan 2021 12:24 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10361

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

This (smallest) or speaker cable would do

https://www.ebay.co.uk/itm/322538635444
  
Post #21991805th Jan 2021 12:38 am
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

Thx
  
Post #21991905th Jan 2021 2:06 am
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

Flapper wrote:


Can you please help me find where the wire threads exactly in to the dash from engine bay

I can’t find an opening anywhere











  
Post #220306917th Jan 2021 3:39 pm
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

Did this today although not routed very well, it worked first time!

Great tekkers
  
Post #22076162nd Feb 2021 11:33 pm
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Flosty
 


Member Since: 09 Feb 2021
Location: Northampton
Posts: 2

United Kingdom 

Hi, I have the same problem and want to try this, but not sure how to connect it to the existing wires. Do you just cut them and use connectors? Is it also worth replacing the sensor?...sorry bit of a novice as you can tell!
  
Post #221036913th Feb 2021 5:04 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10361

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

No don’t bother replacing sensor.

1. you could cut with a knife a bit if insulation off carefully, wrap the new wire round it and then solder the joint.

Or

2. If possible unplug the sensor, stuff the bare wires into the terminals ( ensuring they dont short out ) and then carefully refit the connector to the sensor. That way no damage to the factory wiring, but need to be skilled at doing it
  
Post #221038113th Feb 2021 5:31 pm
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

I carefully cut the casing off half way around each wire, then put the blade in the copper and made a gap so it was separated. Then thread the new wire in the gap. Then wrap it and twist so it’s stuck. Then bit of tape around then both. Then a bit of wire casing I had spare just to hide the mess. Then route the wire safely. Then tuck it under near the bonnet hinge driver side. Then through the door sill (looks scruffy but hey ho) then pull blower cover off, stuff it in. And just left the button hanging out.

At least to see it working before I bother to neatly route it when I can be bothered.

Car seems stiff when it starts with the resistor on. Still dodgy on first start. But it works!

I’ll do a vid myself ASAP I have been meaning to
  
Post #221040013th Feb 2021 6:22 pm
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Flapper
 


Member Since: 04 Feb 2015
Location: Gloucester
Posts: 329

United Kingdom 2005 Discovery 3 TDV6 SE Auto Zermatt SilverDiscovery 3
Cold start using my button.

Hi
When I installed mine see pictures I just cut the wires some where under the plastic cover. Then I soldered my new wires to the existing wires you cold use a crimp or choc block ,but I'm not a fan of that.
You could cover in heat tape as well. Then I ran it up past the battery across under the wipers into the brake plastic box and into the cab through the convenient grommet.
Make sure you leave a bit of slack in the cable when you go from the engine to the body as the engine jiggles when it starts.
Have a look at my other post.
Won't start.
In the last week I have used my magic button everyday.
So far -3 is the lowest temp.
  
Post #221040313th Feb 2021 6:30 pm
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Flosty
 


Member Since: 09 Feb 2021
Location: Northampton
Posts: 2

United Kingdom 

Thanks for your replies, just trying to find the right resistor (between 2-5k) and as always getting confused...do I need a 1/4 or a 0.5 or something bigger? Also, does anyone have a link where you don’t have to buy loads of um!
  
Post #221052514th Feb 2021 6:37 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10361

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Wattage doesn’t matter

Pete K wrote:
Live listings of relevant parts :

https://www.ebay.co.uk/itm/TE-CONNECTIVITY...4902.l9144


https://www.ebay.co.uk/itm/Blue-Off-On-Mom...4902.l9144
  
Post #221054314th Feb 2021 10:23 am
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