Repost, new thread
Someone may have a solution to this. I'm in the process of isolating my engine
so electrically it is above earth. I've had the alternator
modified so it is isolated, replaced single
wire senders/switches with two wire ones, installed a solenoid for the starter, and ran all earth wires what were using the engine
for ground directly to the battery
. So except momentarily when the engine is starting there is no electrolysis
(steel boat). I used Seabis to find several additional engine-related sources of electrolysis
which I can fix. Except one.
I have an external regulator
(Balmar ARS-5). Rather than run the ignition wire to the alternator
directly through the ignition switch (rightly or wrongly, I was concerned about the amount of current), I used a little auto-type relay. Strangely, the ground for the coil circuit in the relay is going to metal. It is showing electrical
continuity with the hull
as tested with my multimeter, as well as indicating a critical fault on the Seabis.
The relay case is not grounded. The only thing I can imagine is that it is coming from the positive side of the coil circuit (some kind of reverse current
flow?.) Can his be addressed with a diode? Or remove the relay altogether? I hace no idea of the current
ratings for the ignition switch or the the ignition wire, but the ignition wire is somewhat heavier than the switch wires.
Thank you, Jim