First off, as this is my first post, I just wanted to say thank you to all the generous people that take time to post on this site. I just bought a 1982 Champion 6.2 Diesel motorhome and have had quite a time getting everything hooked up and working again. This site has made it possible. Really.
On to my question: I have just installed a new battery isolator, but I purchased a group 3 isolator on accident. It has four posts as opposed to the three that a group 1 would have. The auto supply store said they would return it for me as it was sold in mis-marked packaging, but I'm wondering if I can just save everyone the trouble (and a bit of extra cost for the group one isolator) by simply bridging the E post to the A post. I'm just not certain that this would be a sure fire way of solving the problem. Is this a good idea? Has anyone tried this/ know if this would work? Thanks!!