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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240

United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
According to the fitting instructions linked to above, the green/white wire connects to the heated windscreen switch, so I guess it's this signal that's being detected. Dunno what you'd do if you didn't have a heated wind screen though, as the kit instructions would no longer make sense.

edit: ignore that - its the rear heated screen feed that it's shown connected to. Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #714283 24th Jun 2018 9:47pm
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Martin
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Member Since: 02 Apr 2007
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United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
The tow electrics relay doesn't use the engine running signal, it uses ignition (white/green). Any ignition switched source will do to trigger the relay.

The tow electrics wiring spec isn't for an engine running feed, it is ignition switched.

Engine running used to be known as...... oil pressure switch Wink

The Puma cluster emulates an oil pressure switch to make the front screen timer (carried over from the Td5/RRC) work!  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #714293 24th Jun 2018 10:54pm
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blackwolf



Member Since: 03 Nov 2009
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United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
I thought, but may be wrong, that the engine running signal is derived from the alternator on the Puma and is therefore in effect an 'alternator output present' signal. If so, it makes it more suitable for enabling high demand electrical loads than an 'ignition on' signal for obvious reasons.

Interesting that the genuine kit takes the ignition on from HRW switch, since a double cab and presumably truck cab doesn't have an HRW switch normally. I think that most have the wiring less fuse, relay, and switch though.
Post #714321 25th Jun 2018 10:37am
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zsd-puma



Member Since: 09 Aug 2016
Location: Kent
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United Kingdom 2010 Defender 110 Puma 2.4 USW Santorini Black
I expect if they have the wiring then the green white wire for the back of the switch is still an ignition live even if the relay and fuse aren't present. I'm guessing the fuse is just for the high load through the relay.
Post #714325 25th Jun 2018 10:58am
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Martin
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United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
The dash switches are just a "convenient" (ha) place to pick up an ignition feed to tap in to. There is nothing special about the HRW switch being used.

The Puma cluster isn't hardwired to the alternator, it emulates the "engine running" signal based on what the engine ECU is telling it over CAN.  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #714326 25th Jun 2018 11:00am
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Martin
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United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
LandRoverAnorak wrote:
Martin, can you ID the ignition feeds in the under seat fuse box, please? If I do change it, that would be really handy..


Apologies for the delay.


Click image to enlarge


I went with the speedo transducer feed - the white/green from Fuse 11  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #714729 27th Jun 2018 12:14pm
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
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United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
Brilliant, thank you. Another little project Smile Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #714735 27th Jun 2018 12:24pm
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Martin
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Member Since: 02 Apr 2007
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United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
You're welcome Smile  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #714736 27th Jun 2018 12:25pm
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lost gringo



Member Since: 28 May 2018
Location: santiago
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Chile 2013 Defender 90 Puma 2.2 HT Baltic Blue
tow attached light
dont mean to hijack but on the same end of the box i have a permanent indication of tow attachment, or the little tow light in the dash guy. i had assumed it was due to some bad wiring done by previous user but cant find anything.
anyone got thoughts on that?
Post #717384 12th Jul 2018 8:14pm
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zsd-puma



Member Since: 09 Aug 2016
Location: Kent
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United Kingdom 2010 Defender 110 Puma 2.4 USW Santorini Black
Check for corrosion in the towing socket on the back of the car. That can make your trailer light flash.
Post #717425 12th Jul 2018 10:12pm
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Martin
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United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
Does your Defender have LED indicators fitted?  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #717443 13th Jul 2018 6:44am
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lost gringo



Member Since: 28 May 2018
Location: santiago
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Chile 2013 Defender 90 Puma 2.2 HT Baltic Blue
yes, full led on all points. wait, am not sure about back up lites, expect they are not led, will go check.
is that my bad?
Post #717949 15th Jul 2018 9:44pm
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Martin
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Member Since: 02 Apr 2007
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United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
The trailer warning light isn't controlled by the trailer relay, it is controlled by the indicator relay (flasher unit).

As you have LED indicators you should have an LED-type flasher unit. I think these have an adjuster on them which you should adjust to stop the trailer warning coming on all the time.

There are a few thread on here about this if you have a search Smile  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #717973 16th Jul 2018 6:11am
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lost gringo



Member Since: 28 May 2018
Location: santiago
Posts: 18

Chile 2013 Defender 90 Puma 2.2 HT Baltic Blue
martin, many thanks,, should have been obvious. found another post that said relay was behind the clock so i took that off first. the adjustable on my 2013 2.2 is on steering column fuse pad.
Post #718241 17th Jul 2018 4:58pm
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