The wire going to the key switch turns on the internal regulator and the wire going to the starter provides the feedback sense voltage to the regulator so that it can hold the output voltage constant.
These wires are needed for an internally regulated alternator. If they are not connected, your alternator will a) not turn on and/or b) will not provide a correct voltage output. If you have converted the alternator to an external fixed or smart regulator, they will not be needed but can be used for the external regulator for the same purpose. Rich Knowles Halifax, NS C&C Alumnus On Apr 24, 2017, at 10:07, David Knecht via CnC-List <[email protected]> wrote: I am going to try again with a simpler alternator question and hope someone knows the answer: My wiring diagram for the engine shows a purple wire connected to the Exciter terminal of the alternator and running to the key switch and a orange-red wire connected to the Sense terminal and running to the starter. I am having trouble finding information on what those do. Does any one know their function and what would happen if they were not connected? Thanks- Dave Aries 1990 C&C 34+ New London, CT <pastedGraphic.tiff> _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray <https://www.paypal.me/stumurray> All Contributions are greatly appreciated! _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
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