Ok, finally had some time to work on the 510, I did as you said and at idle I was getting 12.42 fromt he battery, at higher revs it was the same, so I went to the alternator and checked there. Same voltage so I figured the Alt was the problem, swapped it for another and it didn't change anything. I took the battery and the Alternator in and they both test out fine. Not sure where to go from here.