J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Ignition switch replacement?

unless you have an isolator, you will only charge the battery that the switch selects (1-2 or both). If you get different readings on both, you may have a poor connection to the lower battery. My old electrical repairman hates isolators (causes alternator problems) I had partial charging until I cut out the isolator and hooked the alternator up to the main power connection at the starter.