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CraigF15



Member Since: 20 Jun 2016
Location: Cheshire
Posts: 4

United Kingdom 2007 Defender 110 Puma 2.4 SW Santorini Black
Switch to disable ABS
Hi,

I recently bought a defender 110 XS and had a custom switch which I had not a clue what it was for, I have traced the electrics and it appears to be connected to a relay switch which then disables / enables ABS by removing electrics from the fuse.

Hopefully a quick question, when would it be beneficial to have the ABS disabled and would it be best just to remove the extra wiring and put the fuse back in it's normal place? I believe you need to turn off the ignition and then disable the ABS via the switch before turning on the ignition again, re-enabling can be done with the engine running.

Thanks.
Post #546774 7th Jul 2016 8:54am
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554


Click image to enlarge


this may help you work out how the mod has been wired
Post #546779 7th Jul 2016 9:09am
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CraigF15



Member Since: 20 Jun 2016
Location: Cheshire
Posts: 4

United Kingdom 2007 Defender 110 Puma 2.4 SW Santorini Black
Thank you,

They have wired it across Fuse 1 in the battery junction box, the switch on the dash simply removes the current going to the fuse, I think this simply disables ABS from operating completely.
Post #546781 7th Jul 2016 9:12am
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couplands



Member Since: 31 Aug 2011
Location: Peak District & Cornwall
Posts: 1826

United Kingdom 2001 Defender 90 Td5 HT Oslo Blue
Re: Switch to disable ABS
CraigF15 wrote:
Hi,

I recently bought a defender 110 XS and had a custom switch which I had not a clue what it was for, I have traced the electrics and it appears to be connected to a relay switch which then disables / enables ABS by removing electrics from the fuse.

Hopefully a quick question, when would it be beneficial to have the ABS disabled and would it be best just to remove the extra wiring and put the fuse back in it's normal place? I believe you need to turn off the ignition and then disable the ABS via the switch before turning on the ignition again, re-enabling can be done with the engine running.

Thanks.


Sometimes it helps to have the ABS off when on snow or gravel. The theory being is that due to low grip on these surfaces, the ABS kicks in very early and the wheels dont stop - hence you dont stop. With ABS off, the snow/gravel can build up infront of the locked wheel and stop you sooner.

Ive never tried it (turning abs off), but do know that ABS on snow/ice means you never stop....I slid into a nice dry stone wall that way many years ago... Embarassed

cheers

simon
Post #546782 7th Jul 2016 9:13am
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CraigF15



Member Since: 20 Jun 2016
Location: Cheshire
Posts: 4

United Kingdom 2007 Defender 110 Puma 2.4 SW Santorini Black
Thank you.

Makes sense, will need to give it a try on some gravel with both to see what happens before I decide to rip it out.
Post #546788 7th Jul 2016 9:34am
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Jukathy



Member Since: 25 Jan 2015
Location: Berlin
Posts: 170

2012 Defender 110 Puma 2.2 SW Keswick Green
The car doesn't stop with ABS. That's awful.
Why did you order your car with an incapable system?
Post #546965 7th Jul 2016 9:09pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17327

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
I recall that the early Quattros had a switch to disable the ABS for precisely this reason, an experienced driver can stop a car quicker in snow etc without ABS.
Post #546968 7th Jul 2016 9:23pm
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Naks



Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2633

South Africa 2010 Defender 90 Puma 2.4 SW Alpine White
not sure how insurers work in your country, but if you disable a safety feature on the vehicle, they may refuse a claim in case of an accident. --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ
Post #547043 8th Jul 2016 8:29am
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Iggle piggle



Member Since: 10 Sep 2014
Location: Wales
Posts: 378

United Kingdom 1989 Defender 90 V8 Petrol ST Alpine White
& if you kill someone..... you may go to jail! Crying or Very sad
Post #547059 8th Jul 2016 10:42am
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Naks



Member Since: 27 Jan 2009
Location: Stellenbosch, ZA
Posts: 2633

South Africa 2010 Defender 90 Puma 2.4 SW Alpine White
Guys, we don't have snow on the roads here, so I can't comment on that.

However, I have driven thousands of kms on gravel all over ZA and Namibia, and not once have I found that ABS is an issue.

The key is to deflate your tyres and to keep to a reasonable speed, around here that would be 80kmh in the dry and 60kmh in the wet.

Thumbs Up --
2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ
Post #547062 8th Jul 2016 10:52am
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agentmulder



Member Since: 16 Apr 2016
Location: Outer Space
Posts: 1324

Kuwait 
Quote:
I have driven thousands of kms on gravel all over ZA and Namibia, and not once have I found that ABS is an issue.


I did a masters in engineering, one of our final topics in control theory was ABS in snow, where we modelled a Bosch system.

The problem is very specific to snow only... Solved the bowel problem, working on the consonants...
Post #547072 8th Jul 2016 11:35am
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Green Machine



Member Since: 19 Nov 2010
Location: North Yorkshire
Posts: 1226

United Kingdom 2005 Defender 90 Td5 CSW Tonga Green
I think the Land Rover Experience vehicles were fitted with a switch to enable the ABS / TC to be disabled. What colour is your 110 (most Experience vehicles are silver, or white more recently)? Primarily for the purpose of being able to demonstrate the difference in the way the vehicle behaves with / without ABS / TC. 2005 Td5 | 90 Station Wagon | Tonga Green
Post #547084 8th Jul 2016 11:55am
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Sadi



Member Since: 23 Jul 2015
Location: Windhoek
Posts: 334

Namibia 2016 Defender 110 Puma 2.2 Heritage Edition SW Grasmere Green
Amarok & ABS..
Post #547136 8th Jul 2016 3:56pm
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miker



Member Since: 13 Sep 2015
Location: Surrey
Posts: 1762

United Kingdom 1999 Defender 110 Td5 CSW Rioja Red
agentmulder wrote:
Quote:
I have driven thousands of kms on gravel all over ZA and Namibia, and not once have I found that ABS is an issue.


I did a masters in engineering, one of our final topics in control theory was ABS in snow, where we modelled a Bosch system.

The problem is very specific to snow only...


I assume that there's so little friction that all 4 wheels will lock at practically the same time, thus the system assumes the car is still moving with wheels locked, and tries to regain traction by releasing wheels?
Post #547138 8th Jul 2016 4:08pm
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Sadi



Member Since: 23 Jul 2015
Location: Windhoek
Posts: 334

Namibia 2016 Defender 110 Puma 2.2 Heritage Edition SW Grasmere Green
More to ABS...
On an advanced driving course in 1990 - the instructors would disable the ABS so that drivers could learn cadence braking.

Recently visited an old hand regarding Land Rovers - he abhors using ABS on a gravel road - on his Defender the fuse is permanently removed ...

Before DSC became available - it was common practice to remove the ABS fuse to facilitate dune- and deep sand driving - although I did not drive a Defender at that time and cannot comment on it.

I was involved in an A6 Quattro accident on a gravel road when I had to swerve and brake to avoid an animal crossing the road - I believe the vehicle would have stopped better without ABS.

Had a recent emergency stop in the Defender - also for a wild animal - no swerving involved and I was pretty impressed the way the vehicle behaved.

To the OP: there may then be a variety of reasons why such a switch may have been installed.
Post #547141 8th Jul 2016 4:21pm
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