I've finally managed to change my main batteries. I turned off the mains charger which was on float charge, then turned off the battery isolator. I removed the leads and lifted the old batteries out. While lowering in the new ones, the leads touched and there was a brief spark. On checking with a meter, there was 12 volts at the leads before they were touching the new batteries. This had to be coming from the engine start battery. Surely this is wrong, are the two circuits not supposed to be independant? My engine has two alternators, so I assumed they were totally separate.
Any lecky experts out there please?
Mike
Stargazer, K&A