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Suspension Failure - Brake Light Switch !!
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nujjer
 


Member Since: 29 Aug 2012
Location: DT11 9BW
Posts: 30

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

New switch arrived. bbyer instructions are excellent - literally a 10 minute job, including removing the panels. But, someone had been there before me; the switch I found was the FeMoCo (whatever) non-OEM. I swapped it out anyway, but the problem did not get fixed. IN ADDITION I now have the Adaptive Front Light System flashing amber. I put the old switch back in to de-bug, and the AFLS light still flashes.

Brake lights OK (x3). Reversing Lights OK (x2).

What next? bbyers circuit diagram implies that it could Hill Descent relay or ABS module. And TRANSFER CONTROL BOX is listed on the same diagram - but I cant see how it's connected. http://www.disco3.co.uk/gallery/displayima...&pos=8

Is it likely that one of the actual lights is telling the truth, and that the Hill Descent, DCS, or Suspension modules are busted?
  
Post #139341121st Dec 2014 1:33 pm
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sean 471
 


Member Since: 26 Apr 2011
Location: Sheffield
Posts: 2990

United Kingdom 2007 Discovery 3 TDV6 Pursuit LE Auto Java BlackDiscovery 3

Try and find some forum member near you that has d4 rear lights they might be kind enough to swap the rear lights over for an hour to eliminate them. I changed mine and it's run fine since.
  
Post #139342421st Dec 2014 2:23 pm
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Syd
 


Member Since: 02 Nov 2008
Location: Spain & Hampshire UK
Posts: 860

United Kingdom 

FeMoCo
Could it be an old Ford part FoMoCo Ford Motor comany
 In Spain - 2018 F Pace - Down and out's Velar
In UK - Dare not say on this Forum
Gone - Lots of Lode Lane vehicles.
- Beta User 
 
Post #139342921st Dec 2014 2:46 pm
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Syd
 


Member Since: 02 Nov 2008
Location: Spain & Hampshire UK
Posts: 860

United Kingdom 

I would assume that fitting LED's to the rear lamps might help this problem with the brake light switch, the inrush current of a bulb is high enough to damage the switch contacts.
 In Spain - 2018 F Pace - Down and out's Velar
In UK - Dare not say on this Forum
Gone - Lots of Lode Lane vehicles.
- Beta User 
 
Post #139343121st Dec 2014 2:48 pm
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nujjer
 


Member Since: 29 Aug 2012
Location: DT11 9BW
Posts: 30

United Kingdom 2005 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

@sean471 - I like your suggestion and I have no doubt your fix worked, but it seems crazy - the light unit can only be an entirely passive bunch of plastic and wire. But given your car works and mine doesn't you win on the result! Very Happy

...here's a thing. I have another common problem - water ingress form suspected sunroof drainage... I have been unable to fix for a year, and generally ignored it (my bad) maybe now it's having a secondary effect.
  
Post #139345521st Dec 2014 3:51 pm
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Eesti landie
 


Member Since: 11 Oct 2013
Location: Tallinn
Posts: 8

Estonia 2006 Discovery 3 TDV6 SE Auto Vienna GreenDiscovery 3

Hi I took out the battery and found this do you think this could be the problem or the ACU behind this.This fault is not constant are there any other sensors I could check ?
  
Post #139346521st Dec 2014 4:04 pm
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Narpy
 


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

2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

It is possible for a brake bulb to fail, the filament collapse yet the bulb will still illuminate. The problem with this scenario is the car senses the change and throws a wobbly via the suspension and HDC warnings.
For this reason you must change the bulbs even if they appear to still work, at the same time you change the brake switch. Wink
 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 #139347921st Dec 2014 4:41 pm
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Lost for Words
 


Member Since: 03 Sep 2013
Location: Warminster, Wiltshire
Posts: 6703

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

Water ingress has often been known to cause a corroded Transfer Box ECU so that could be your problem.

Check your wiring in the wheel arches - another common place to cause issues. Thumbs Up
 Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off Sad )
Disco 3 06 reg B7S Manual Rimini Red Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped Very Happy
Several Discovery 300 TDis
 
 
Post #139348021st Dec 2014 4:45 pm
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Eesti landie
 


Member Since: 11 Oct 2013
Location: Tallinn
Posts: 8

Estonia 2006 Discovery 3 TDV6 SE Auto Vienna GreenDiscovery 3

Which bulbs do I replace all of them or what numbers are they
  
Post #139348321st Dec 2014 4:50 pm
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Eesti landie
 


Member Since: 11 Oct 2013
Location: Tallinn
Posts: 8

Estonia 2006 Discovery 3 TDV6 SE Auto Vienna GreenDiscovery 3

Where In the wheel arch front back ?
  
Post #139348421st Dec 2014 4:51 pm
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Eesti landie
 


Member Since: 11 Oct 2013
Location: Tallinn
Posts: 8

Estonia 2006 Discovery 3 TDV6 SE Auto Vienna GreenDiscovery 3

Where In the wheel arch front back ?
  
Post #139348621st Dec 2014 4:56 pm
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Narpy
 


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

2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

Try using the search facility, all the answers are here on the forum. Wink
 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 #139349921st Dec 2014 5:18 pm
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D3Norway
 


Member Since: 15 Sep 2009
Location: T
Posts: 96

Norway 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

nujjer wrote:
New switch arrived. bbyer instructions are excellent - literally a 10 minute job, including removing the panels. But, someone had been there before me; the switch I found was the FeMoCo (whatever) non-OEM. I swapped it out anyway, but the problem did not get fixed. IN ADDITION I now have the Adaptive Front Light System flashing amber. I put the old switch back in to de-bug, and the AFLS light still flashes.

Brake lights OK (x3). Reversing Lights OK (x2).

What next? bbyers circuit diagram implies that it could Hill Descent relay or ABS module. And TRANSFER CONTROL BOX is listed on the same diagram - but I cant see how it's connected. http://www.disco3.co.uk/gallery/displayima...&pos=8

Is it likely that one of the actual lights is telling the truth, and that the Hill Descent, DCS, or Suspension modules are busted?


I have read your thread And I experience the same issue... New switch but no fix..
What did you end up with??
 christian@betekconsult.com  
Post #141356324th Jan 2015 4:03 pm
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Valhalla
 


Member Since: 23 Oct 2011
Location: Isle of Skye
Posts: 124

Scotland 

Just a thought, a quick thought, but do your warning lamp symptoms come up on the instrument pack with the brake pedal depressed, or do they tend to do it more when the pedal is not depressed, and you are just pulling away from rest at low speed?

If you have any access to a diagnostic tool with live data, look at the value in the SASM (steering angle sensor module) when the wheels are pointing straight ahead. Any deviation from 0degrees will (to varying levels of severity) bring up the symptoms you have. The fault is generally the drive dog on the steering column coming loose, and easy and cheap fix with epoxy glue and a SASM recalibration.
  
Post #141506627th Jan 2015 1:12 am
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DiscoMum
 


Member Since: 17 Aug 2016
Location: Devon
Posts: 1

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Unknown ColourDiscovery 3
Please help!

gtiturbolr3 wrote:
At last. After 7 weeks of hell. A split cable under rear passenger door rail. Apparently the factory punch cables instead of soldering them when they extend the cables. Thhis cable was completly separated from one another.

So, next time open your truck and start following the cables to find the root to your problems.



i have exactly the same problem as you had with your disco 3 - with the hdc warning light, special programs off and lowered suspension coming on when I let off the brake. When I press the brake while starting the car I have no lights, but as soon as I leave off the brake all lights ping on.
Please could you let me know what colour wire/cable was spliced and where it was so I can have a look for myself in case this is my problem.
I have changed the battery and the brake light switch so far and neither have worked!
I would be very grateful for any assistance.
  
Post #169327017th Aug 2016 10:45 pm
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