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Old 31-07-2017, 11:38   #1
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volvo penta 2003b wiring diagram help

Hello all,

I'm trying to figure out how my wiring works to better de-bug problems. I found the wiring diagram for my engine and am having trouble figuring out what the two diodes in the yellow circle do. From what I've learned on other posts/web searches a diode acts like a fluid check valve but for electricity (apologies to EEs if I'm wrong, I just started learning about this stuff).

General Question - Why would anyone put two diodes pointing toward each other?

Specific Question - What are the two diodes doing in this spot?

Any help or nudges in the right direction appreciated. I've got Calder's books and Charlie Wing's electrical book. Any other recommendations?
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