I lost a zinc on my prop shaft very quickly. My boat is moored with only
one other boat within miles. The only possible source on my boat (I
think) is the bilge switch in my bilge because it is the only thing on.
The connection to the switch is out of the bilge water, so it can only
be coming from the switch itself. I have a voltmeter. Is there any easy
way to test to see if the switch is leaking current?