I will apologize in advance if this has been covered, but I searched and didn't come up with much. I have a NOCO 140A battery isolator that I bought last year and finally hooked it up last week. I'm not sure if I have it wired correctly though. I simply removed the heavy gauge wire from the alternator and taped it off and ran a new wire from the alternator to my isolator alternator input. My two batteries are hooked to the two outputs on the isolator. With the boat running I am getting 14.4V on the alternator output and 13.7V on each battery, which from what I read this is a normal voltage drop across the diodes.
Now my question is, do I have this hooked up correctly? There's another post on the isolator that has nothing on it, do I need to tie an ignition switched wire to this or something else from the alternator?
Also, I have read a lot about the Automatic Charging Relay. Should I just ditch the isolator and go with one of these? My main reason for the isolator was to separate my stereo system battery from the rest of the boat since I was getting pops through the speakers when I operated the trim buttons. I only had the boat out briefly, but it appears the problem is gone with the isolator.
This is on a 2005 Tahoe Q4 with Mercruiser 4.3L carb'd engine.