With all the possibilities that can be wrong, sounds like a amperage problem to me. However I would suggest giving Craig Calkins at Stabilized Marine a call, He gives advice and his knowledge freely. I have done extensive work on my Naiads with his help and advice and diagnosed many problems. As well as advice etc, his background and knowledge of his many years, has given him an immense background acumen. Parts are shipped swiftly, even internationally.
Stabilized Marine Home Tel954-797-7330 email
stabilizedmarine@comcast.net