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  1. #1

    Default What is L and R on the alternator?

    Hello. I have Mercruiser 1.7 DTI with alternator that have L and R terminals. L is for the charging light on dashboard. But what is R doing?
    Does R output the same power as B+ ? Wire scheme is attached.

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  2. #2
    Join Date
    Sep 2008
    Maryland - USA

    Default Re: What is L and R on the alternator?

    Being that your R terminal is fed from the ignition, its likely the "excite" function that gets things charging when you start the engine...

    So, the R terminal is an INPUT, not an output....it is switched so the alternator shuts off with the engine.

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