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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324  
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There are lots of ways you could do this, depending on how complicated you're prepared for it to be. All involve adding something to the sprayer rather than the Defender, to keep it neat and self contained.
One option would be a wireless remote relay (Hella do one that's rated for the load, although I expect there are others), with the relay itself fitted into a waterproof box. Another would be a regular relay, similarly mounted, with the trigger connection to the side light circuit of the towing connection. That way, you turn on the sidelights to power up the pump. A third, slightly more involved solution would be a changeover relay with the trigger connected to the reverse light circuit of the tow bar. Briefly select reverse to turn on the pump, select it again to turn it off. 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 |
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19th Jun 2017 11:38am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17383 
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Presumably the sprayer is using the ignition-controlled 12V supply usually used for caravan fridges etc in the 13=pin socket?
If so, why not just wire a manual switch into the supply (or into the circuit actuating the ignition controlled relay which controls the supply)? |
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19th Jun 2017 12:39pm |
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| discomog Member Since: 09 May 2015 Location: Notts/Lincs Border Posts: 2526 
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Hi Blackwolf. The sprayer pump is connected to a 13pin plug with only two wires, pos and neg that connects into the 13 pin socket on the Defender. I would prefer not to modify the defender wiring if I can get away with it and therefore like the idea suggested by LR Anorak of a wireless remote switch.
Thank you both for your suggestions, I'll do a Google search for a Hella remote switch. Defender 90XS SW Mini Countryman Cooper S Morgan Plus 8 |
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19th Jun 2017 1:46pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605 
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Does the sprayer run as soon as it is plugged into the Defender's socket, or only when the Defender's ignition is switched on?
If the latter you can interrupt the ignition feed as it done by a relay generally fitted in the seat box and the feed taken from the upper dash switches.  1988 90 Td5 NAS soft top
2015 D90 XS SW |
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19th Jun 2017 2:05pm |
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| discomog Member Since: 09 May 2015 Location: Notts/Lincs Border Posts: 2526
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Hi Martin,
It is wired into the 12v ign circuit (pins 10 and 11). i need to be able to switch off the pump remotely whilst the engine is still running. Defender 90XS SW Mini Countryman Cooper S Morgan Plus 8 |
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19th Jun 2017 2:09pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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Brilliant
You can modify the ignition supply to pin 10 to add a switch inline. In your left hand (battery) seat box you should have a relay like this:
(if it is missing the fuse on the side it is likely an aftermarket kit so a different approach would be needed). Simply remove the fuse and fit a switch on fly-leads and spades on the end, including a fuse sufficient for your pump (i.e. 10A) in the fly-leads. This would interrupt the supply to the relay and hence the supply to anything downstream. This gives you a non-intrusive and totally reversible mod to switch your pump off from the cab. 1988 90 Td5 NAS soft top
2015 D90 XS SWLast edited by Martin on 19th Jun 2017 3:15pm. Edited 1 time in total |
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19th Jun 2017 2:22pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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Edited above slightly for fuse
1988 90 Td5 NAS soft top
2015 D90 XS SW |
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19th Jun 2017 2:27pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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1988 90 Td5 NAS soft top
2015 D90 XS SW |
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19th Jun 2017 2:43pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17383
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^^ Exactly what I had in mind, only much, much better explained!
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19th Jun 2017 2:58pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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Just stumbled on my diagram for this and wondering whether you did this and got it working?
1988 90 Td5 NAS soft top
2015 D90 XS SW |
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17th Nov 2017 12:40pm |
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| discomog Member Since: 09 May 2015 Location: Notts/Lincs Border Posts: 2526
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Thanks Martin. This is on my list of "Jobs to do this winter" as I will not be using my sprayer until next spring. I'll let you know if it works but I'm sure it will.
Defender 90XS SW
Mini Countryman Cooper S Morgan Plus 8 |
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17th Nov 2017 12:47pm |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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1988 90 Td5 NAS soft top
2015 D90 XS SW |
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17th Nov 2017 1:05pm |
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