I realize this is a long-shot but I thought it would be worth a try. I bought a little doo-dad to serve as a low battery/alternator failure indicator (a whopping $6.00). It's called a Maxpro 3S and someone on this forum suggested that I put two diodes in series in the circuit. The unit seems to work fine when the engine isn't running, but when I fire the engine up and kick on the alternator the unit goes to a flashing red LED and the buzzer sounds (normally what the unit does if the voltage is way low). I (of course) have lost the little paper that came with the gadget, but I'm wondering if maybe it does this because of an OVER-voltage situation. Does anybody happen to know anything about how these circuits are typically built? Thanks.
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