Lotus Elan

Headlight pod micro-switch wiring

PostPost by: Evante » Tue Jun 12, 2018 4:40 pm

I took the advice of a number of members and purchased a new wiring loom for my '72 Sprint. It looks like it is a generic loom for an S4. :shock:

I am having trouble figuring out the wiring for the two micro switches on the headlight vacuum switch.

I recently saw a post for the lamp switch that was hugely helpful.

Any help on the micro-switch wiring would be greatly appreciated.

Jay Supnick
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PostPost by: MarkDa » Tue Jun 12, 2018 7:25 pm

Micro switches allow the relays to go to earth and so turn headlights on.
Have you got a wiring diagram?
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PostPost by: Evante » Tue Jun 12, 2018 8:04 pm

I do have a wiring diagram but it does not show the micro-switches, only the "Lamp Switch" which I assume is the toggle switch next to the micro-switches.
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PostPost by: MarkDa » Tue Jun 12, 2018 9:03 pm

Try this one with micro switches shown

S4 electrical diagram clean png.pdf
S4 Wiring Diagram
(1.48 MiB) Downloaded 39 times
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PostPost by: pharriso » Tue Jun 12, 2018 11:03 pm

I assume we're talking about Failsafe federal headlights? Please see my thread - http://www.lotuselan.net/forums/lotus-electrical-f38/late-federal-fail-safe-headlight-wiring-t30133.html

Good talking with you earlier today Jay...
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PostPost by: Evante » Wed Jun 13, 2018 1:45 pm

Thanks for your help!

Jay Supnick
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PostPost by: billwill » Thu Jun 14, 2018 11:44 am

pharriso wrote:I assume we're talking about Failsafe federal headlights? Please see my thread - http://www.lotuselan.net/forums/lotus-electrical-f38/late-federal-fail-safe-headlight-wiring-t30133.html

Good talking with you earlier today Jay...


Does the failsafe aspect make any difference to this part of the circuit:
When they are down they are off
and when they are up they are on
and when they are only half-way up
they are neither off nor on.

:D :) :shock:
Bill Williams

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PostPost by: alan.barker » Thu Jun 14, 2018 3:53 pm

Failsafe is wired different.
When Failsafe have a leak in the Vacuum system and come up they should switch on the headlamps.
Failsafe should only switch on Headlamps when the Headlamp Switch on the dashboard is in Headlamps on position.

On Elan +2s130 cars the left Stalk on the Steering Column pulls back to flash headlamps if the Dip switch is in High Beam position.
Alan
Alan.b Brittany 1972 elan sprint fhc Lagoon Blue 0460E
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PostPost by: MarkDa » Thu Jun 14, 2018 4:08 pm

I think that a lot if the stalks being a triumph part have the pull to flash capability.
Not much use with normally retracted headlights though!
Lifting the lights does illuminate them when ignition on which I suppose is a sort of flash facility - I use it when pulling into my remote opening garage.
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PostPost by: alan.barker » Thu Jun 14, 2018 4:54 pm

[quote="MarkDa"]I think that a lot if the stalks being a triumph part have the pull to flash capability.
Not much use with normally retracted headlights though!
Lifting the lights does illuminate them when ignition on which I suppose is a sort of flash facility - I use it when pulling into my remote opening garage.[/quote

Hi Mark,

Sorry but i'm talking about a +2S130 Failsafe and when you pull back the Triumph Stalk to flash the Headlamps it actions the Electric solenoid that makes the Headlamps rise. As the headlamps rise they switch mainbeam on.

At least that's how the Lights worked on my 1973 +2S130/4.

No need to use the usual Switch in the Dashboard for flashing.

Alan
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PostPost by: MarkDa » Thu Jun 14, 2018 5:56 pm

Indeed but either way you still have the lamp lifting time before lights are effective.
Do you have to hold the lever all the time?
On standard vacuum you pull, lights lift and illuminate then push and lights go down.
The stalk can be wired to work high beam when pods are up but not energised, easily eenough.
I've thought about this for motorway driving.
Last edited by MarkDa on Thu Jun 14, 2018 6:55 pm, edited 1 time in total.
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PostPost by: gjz30075 » Thu Jun 14, 2018 6:02 pm

A bit different on Federal cars. My Federal Sprint has micro switches on the pull knob and that
determines whether or not the lights come on. The lights up or down has no bearing to
on or off. In other words, if Iose vacuum, the lights come up but they're not on because my
switch is still pushed in (off). No flasher circuit.
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PostPost by: alan.barker » Thu Jun 14, 2018 7:13 pm

Yes you need to hold the stalk back to flash and after flash let go.
I found it very handy and very fast because there is only one Headlamp Pod to draw the vacuum, not two.

Failsafe is much faster action because of only one Vacuum Pod to pull vacuum.

Alan
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PostPost by: Bigbaldybloke » Sun Jun 17, 2018 11:53 pm

My early plus 2 had been modified to have the two spot lights under the bumper. During my rebuild and rewire, I’ve added an extra relay to the light circuit so that if you flash the lights using the column stalk and the pods are down, it flashes the spot lights, if the pods are up it flashes the main beams as normal. The relay is worked by one pod microswitch. My pods have been modified to be motorised with a Mazda electric headlight motor.
Change is inevitable, except from a vending machine!
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PostPost by: MarkDa » Mon Jun 18, 2018 12:03 am

That's a neat idea to avoid the lift delay.
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