Ivan
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| posted on 13/9/16 at 10:23 AM |
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Toggle Switch Help needed
I have found four old toggle switches I want to use in my Cobra dashboard (this type is legal in South Africa) but have some questions about how they
function. Any help would be appreciated. I think the switches are from an old Jag.
 
Switch Top
This photo 1 shows the top view with two terminals that seem to be joined by a slab of graphite like material – what is the slab’s function?
 
Switch Slab
Photo two shows the slab removed – what will happen if I remove it?
 
Switch Rear
Photo three shows the rear of the switch with two male terminals and one female. I guess the female is the live feed in – am I correct?
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coozer
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| posted on 13/9/16 at 10:41 AM |
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The graphite will be joint that two spades together. Taking it out will isolate them. It will have been put there for whatever function the switch
was originally.
You can easily check the function of the switch with a multimeter.
1972 V8 Jago
1980 Z750
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owelly
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| posted on 13/9/16 at 01:11 PM |
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It looks likeba Lucas switch and there are a few types so Google Lucas toggle wiring diagram and see if there's one the same.
http://www.ppcmag.co.uk
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02GF74
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| posted on 13/9/16 at 05:45 PM |
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Looks like lucas switch. Dont take it apart unless you need to clean contacts as there a tiny springs inside.
Is it 2 or 3 way?
Never seen the "graphite " slabs before, looks to me like padding as the "terminals" they are under appear more like clips,
could be screening for electrical interference? Dunno.
As said, a multimeter across terminals to map out the contact arrangement.
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Ivan
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| posted on 14/9/16 at 10:28 AM |
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Yes they are Lucas - did run an Ohm meter across them with very strange results - it seems that no matter where the toggle is there are always some
circuits live - a google isn't very helpful either. The two types I have are type 31969E which appears to be a dash board lighting switch which
sometimes has resistors instead of the slab for dimming, and Type 34425E which is a 6 terminal switch apparently a fuel source change over switch
although most seem to be 8 terminal.
If anybody has more info it will be welcome.
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gremlin1234
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| posted on 14/9/16 at 06:21 PM |
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I've not seen switches with resistors on them, but the 'slab' could very easily be just that. I would expect it to be in the 1-3 ohm
range for the panel lights, so most multimeter's would just indicate continuity.
see also
http://www.holden.co.uk/displayproduct.asp?sg=1&pgCode=020&sgName=Electrical&pgName=Switches&agCode=0501&agName=Toggle+Switches+-+
Lucas+Lever&pCode=020.157#prettyPhoto
edit
linky
edit2:
this link may help too
http://fairislepress.com/WP/?p=3671
[Edited on 14/9/16 by gremlin1234]
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02GF74
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| posted on 14/9/16 at 06:23 PM |
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Hmmm doesnt sound much like a switch if contacts are live???!!
Do you trust the dvm readings? You could always use a battety and light bulb to check it out.
Take a look at series land rover toggle switches, look similar to the ones if you are unsure about these.
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gremlin1234
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| posted on 14/9/16 at 08:19 PM |
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while looking I found this
http://www.trtriumph.com/images/Lucas%20switches%20and%20wipers%20parts%20list.pdf
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owelly
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| posted on 15/9/16 at 04:17 AM |
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Looking at a Mk10 Jag wiring diagram shows a DPDT (double pole, double throw) switch, so try this:
http://www.ppcmag.co.uk
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