2004 300 HPDI auxiliary charging issues

[Drew Bob]

The auxiliary charging system does not seem to be working. I know this because the house batteries went down while out fishing. All of the batteries were installed 6 months ago. When we got back I charged all of the batteries over night and had 13.? volts on each battery. While running the engines at idle the starting batteries showed 14.? volts and each house battery was 12.6 volts. Confirmed that the fuses in the fuse block are good. I pulled the relays and put them back as I do not know how to check them. Where should I look next?

 

[bcclew]

cking a relay with out a dia can be tricky.I would say put wires back the way they were and ck voltages if good relays are good. to run 3 batts you should be useing a isolator . do some more reserch