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PaulMc



Member Since: 17 Jan 2009
Location: Kent
Posts: 502
United Kingdom 1989 Defender 110 2.5 TD HT Arles Blue
The standard switch (YUG000460LNF) is wired as follows -

Pin 1 - From Land Rover Timer Relay (PRC6796)

Pin 2 - Live from Dash Illumination

Pin 3 - Not Used (but internally connected to Pin 4)

Pin 4 - To Earth

Pin 5 - Live from output side of Relay (to light the tell-tale LED)


In the standard configuration, this switch provides a momentary earth path from Pin 1 to Pin 4


However, if you're using the (much cheaper) Nagares timer relay (GLR10) in your circuit, as in the diagram posted by Penfold earlier in the thread, this requires a momentary positive to trigger it.

This can be achieved in one of two ways -

1. Use YUG000460LNF to momentarily switch the earth side of a relay, which then provides a momentary positive to the GLR10

2. Modify the internals of YUG000460LNF to make it a live switching momentary switch -

Un-modified switch internals


Click image to enlarge

Pin 1 - from Timer Relay

Pin 2 - Live from Dash Illumination

Pin 3 - Not Used (but internally connected to Pin 4)

Pin 4 - To Earth

Pin 5 - Live from output side of Relay (to light the tell-tale LED)


By cutting the Brass track, as indicated by the red mark -


Click image to enlarge

The switch's internal circuit is changed to enable it to be wired as follows -

Pin 1 - Ignition-switched live from fusebox

Pin 2 - Live from Dash Illumination

Pin 3 - To Earth

Pin 4 - Switched Live Pulse to GLR10 relay

Pin 5 - Live from output side of Relay (to light the tell-tale LED)

. Paul.
1989 Arles Blue 2.5TD 110 Hardtop
1999 Epsom Green Discovery II 4.0 V8i 'XS'
Post #985674 15th Mar 2023 8:10pm
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Penfold_6290



Member Since: 22 Sep 2021
Location: Dorset
Posts: 320
United Kingdom 2002 Defender 110 Td5 CSW Epsom Green
Great work Paul, you're a legend!

MM
Post #985719 16th Mar 2023 9:18am
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Evil Elsie



Member Since: 25 Feb 2023
Location: Cumbria
Posts: 202
United Kingdom 2002 Defender 110 Td5 HT Alpine White
Paul,
That is awesome - terrifying, but awesome..👍👍

Many thanks to both you and Penfold.

I assume that I can get the switch apart using my hammer - a bit like cracking a Walnut..?? 🤔 2002 Land Rover 110 Td5 Utility
1990 Suzuki GSXR 1100L
1980 Yamaha RD 350LC
1976 Yamaha RD 400C
Post #985729 16th Mar 2023 10:15am
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Penfold_6290



Member Since: 22 Sep 2021
Location: Dorset
Posts: 320
United Kingdom 2002 Defender 110 Td5 CSW Epsom Green
lol...maybe try a small screw driver first before going the full Tonya Harding on it...
Post #985737 16th Mar 2023 11:00am
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PaulMc



Member Since: 17 Jan 2009
Location: Kent
Posts: 502
United Kingdom 1989 Defender 110 2.5 TD HT Arles Blue
Use a jeweller's screwdriver to CAREFULLY unclip the two halves of the switch -


Click image to enlarge


Modifying the switch is free - but, it's then non-standard.


Using a relay to reverse the switch's polarity costs money - but, keeps the switch standard.


Wired like this -


Click image to enlarge

. Paul.
1989 Arles Blue 2.5TD 110 Hardtop
1999 Epsom Green Discovery II 4.0 V8i 'XS'
Post #985756 16th Mar 2023 1:20pm
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Evil Elsie



Member Since: 25 Feb 2023
Location: Cumbria
Posts: 202
United Kingdom 2002 Defender 110 Td5 HT Alpine White
Ah, got it.... So I'd need an extra relay before the timer relay to reverse the polarity to it..??

Either that or modify my switch (as per the excellent instructions) thereby making the switch 'non standard'..

Ok, I'll have a go - but I can't promise that I won't be back with more questions 😃 and possibly more purchases from Paul to replace broken switches, connectors, wires, centre consoles, dash pads, bulkheads etc.

Right, I'm off to find my extra small hammer....👍👍

Cheers all. 2002 Land Rover 110 Td5 Utility
1990 Suzuki GSXR 1100L
1980 Yamaha RD 350LC
1976 Yamaha RD 400C
Post #985786 16th Mar 2023 4:11pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17443
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
The nice thing about these switches is that with imagination they are almost infinitely modifiable. A few cuts and straps and you can make them do almost anything. You can swap the latching and non-latching mechanisms between switches too. The switches in the 2x3 switch binnacle on Disco and Disco2 are the same family as well and great candidates for modification.
Post #985808 16th Mar 2023 6:01pm
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Evil Elsie



Member Since: 25 Feb 2023
Location: Cumbria
Posts: 202
United Kingdom 2002 Defender 110 Td5 HT Alpine White
Cheers Blackwolf - good to know..👍👍
I am, in this case, going to stick to the script and not deviate in any way from the directions above (I know you're not advising me to..) - I'm well out of my comfort zone.

Gimme a cylinder head to rebuild anyday.😄😄 2002 Land Rover 110 Td5 Utility
1990 Suzuki GSXR 1100L
1980 Yamaha RD 350LC
1976 Yamaha RD 400C
Post #985954 17th Mar 2023 5:18pm
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