the pointy end is the bow
Join Date: Aug 2006
Location: La Conner, Washington
Thanked 27 Times in 26 Posts
Rep Power: 12
I think your temperature alarm sending wire (which is looking for a path to ground to activate) is in partial contact with your charging idiot light wire and feeding back through the instrument panel. I would test this by bypassing the temperature alarm wire with a separate temporary wire to see if the problem goes away. If it goes away, I would start examining the wiring harness between the instrument cluster and the motor and pay good attention to sharp bends or where the harness goes through choke points, as this is where it will most likely chafe.
1983 Fraser 41
La Conner, WA
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Boating for over 25 years, some of them successfully.