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ACS Ignition switch install

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m.speer(at)shaw.ca
Guest

Posted: Sun Nov 19, 2006 1:00 pm Post subject: ACS Ignition switch install

I'm using the ACS keyed ignition switch in my  electrical installation ... ya I know, but made the decision a long time ago  before I knew any better ... anyway now that I'm wiring this switch I  don't understand the results I'm seeing. I have voltage to  the BAT position of the switch once the master is on, no voltage to R,  L, or Both positions and voltage to the starter relay when the start position is  selected with the key, is this all normal? Also is it necessary to ground the  shielded magneto wires at the ignition switch or only at the magneto, I  have read where both are suggested...

  

 Many thanks

    [quote][b]

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nuckollsr(at)cox.net
Guest

Posted: Sun Nov 19, 2006 2:44 pm Post subject: ACS Ignition switch install

I'm using the ACS keyed ignition switch in my electrical installation ... 

ya I know, but made the decision a long time ago before I knew any better 

.. anyway now that I'm wiring this switch I don't understand the results 

I'm seeing. I have voltage to the BAT position of the switch once the 

master is on, no voltage to R, L, or Both positions and voltage to the 

starter relay when the start position is selected with the key, is this all 

normal? Also is it necessary to ground the shielded magneto wires at the 

ignition switch or only at the magneto, I have read where both are suggested



    Magnetos don't get voltage from the battery in

    ANY switch position. You're confusing the function

    of the ACS keyswitch with having similarities

    to your car's ignition switch. The only thing they

    have in common is the need for a key to operate it

    and the fact that it controls the starter.



    See figure Z-27 in



http://aeroelectric.com/articles/Rev11/AppZ_R11J.pdf



    for an explanation of switching functions for the

    ACS switch.



    The shield is best grounded at the engine end only

    and the shield used to PROVIDE a ground at the switch

    end as shown in Figure Z-27. This is the configuration

    that produces the least risk for ignition noise from

    the p-leads and least risk of alternator noise being

    coupled to wiring behind the panel by the ground loop

    fabricated when p-lead shields are grounded at both

    ends.



    Bob  . . .

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