Lucas W3 IGN warning light

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6350_William_French
Posts: 137
Joined: Wed Nov 20, 2019 10:27 am

Re: Lucas W3 IGN warning light

Post by 6350_William_French » Wed Jan 26, 2022 6:37 pm

I thought someone would have an explanation. Thanks All. You learn something new every day.
From Bill

Rod
Posts: 100
Joined: Sun Nov 24, 2019 9:44 am
Location: New Zealand

Re: Lucas W3 IGN warning light

Post by Rod » Thu Jan 27, 2022 8:36 am

Yes, Peter C I should've said British applications :) . The basis of my "thesis" is that in any British hand book of the period I can just about guarantee that the explanation will read something like "As a safeguard against the ignition being left on....", and then later mention its relevance to charging. I don't have any US wiring schematics from the 30s, does this era US car usually have a light and an ammeter? The only detailed US schematic I've got is for a D29 (1949 MY) Dodge; it has an ammeter and nothing else. What I'm trying to say -without putting everyone to sleep- is that if there's an ammeter and a light the latter is primarily an ignition warning light (because you use the ammeter as your primary source of charging information-esp you 3rd brush guys), if there's no ammeter then the light is all you've got and it becomes a 'generator not charging' light.
Totally off topic, but early in my career I once worked on a mid 50s/early 60s Opel, and on that car the light (a green one) was on when the generator was charging and off when it wasn't.

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