> To start let me say that my truck was long since modified by the time I
got
> it. Now in trying to re-wire the beast I am coming to some rather
important
> decisions. For instance, on the old system there was no dipper switch for
> high and low beams. There was a military rotator switch to control how
many
> lights were on (breakfast, wing, front aux., etc.), and a three position
> toggle to control high beams. The first position was off so only low
beams
> were lit. The second position lit the inner high beams, and the third lit
> the outer. Any of you that know the typical scenario will recognize that
> this leaves ALL the filaments burning, high and low on all four
headlights!
> That's a huge draw on the electrical system. My electrically non-inclined
> brain can't see a way to reproduce a dipper style switch using relays and
> standard toggles. Is it possible? Though I like the immense light the
old
> system threw out, my delco couldn't keep up. Even now with a high output
> unit I don't want a constant heavy load like that being imposed. Any help
> in general with the wiring would be appreciated. Currently the wiring
> diagram is being 'muddled' together.
The trick is to use the automotive relay to its fullest extent. The relay
has two output pins. One is Normally Closed (NC) the other is Normally Open
(NO). You run the headlight low off the NC side, hitting the foot switch
switches the relay, the NC becomes dud and the NO power up you high beams.
Simple, easy. Of course you need another relay upstream of this contraption
to shut power off to the low beam (and consequently disable the high beam as
well).
J-L
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