Well….I changed both the house and engine batteries and now the engine will start without pushing the auxiliary switch. So I’m thinking I had a bad connection at the engine battery and lost power so just the alternator was giving power then I beeped my large horns when driving everything shut off.
I think I need a new alternator now?
Test
New Battery voltage 12.51V
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Engine on 14.00V
After 20 seconds I hear a click then 13.40 V
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Engine on Lights and fans on 12.84V