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  1. crestlinercrusader775

    alternator wiring - red and black wire Mercruiser 78403A2

    Ok, so like in this picture:
  2. crestlinercrusader775

    alternator wiring - red and black wire Mercruiser 78403A2

    Hi, I have ordered a new alternator for my boat (Mercuiser 140 HP engine, an older one). Now I am wondering what to do with the red and black wire (see picture). I think the red is the sensing or trigger wire, and black goes to switched 12V+ (ignition). part number of the alternator is...
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