Well I am stumped. My 6.0 will not start unless I switch over to the house batteries. ford replaced my starter batteries no less than a month ago because they where under warranty. I am getting a charge out of the alternator but as soon as I switch off the house batteries the van dies. I have checked the enerta switch, the oil press comes up fine, all of the fuses are good. I was driving it everyday last week and I just sarted it on Monday and it just died. I just drove the Grand Staircase Escalante road prior to the new battery install which shook the you know what out of the van. Any ideas?
2007 E350 6.0 4x4 modified RB 50 SMB