Hi, I would start by performing a voltage drop check on the power cables to the alternator, battery, and starter. I believe (not sure) that the main power wire runs through the starter from the alternator. Check voltage drop in that line, the line between the starter and battery, and also each connection, IE bolts, power lugs, crimped connectors on cables, including main grounds. But a very likely point of high resistance could be the starter lug. focus on this point and the cables, there's probably not much space but a voltage drop test while cranking could show a corroded power wire that increases in resistance under load. Check for crispy insulation, or burnt looking strands in the cables, this is a good sign of a cable that's increasing in resistance under load. See attached diagram:
Edited by: Francis at Bentley on May 30, 2014 4:16 PM
Still strange, last Friday I started from home for 400 km, it was charging 14.3/14.4, stop for the weekend, went back home Sunday evening, start the Eurovan, charging at 13.7V almost for the entire 400KM but like 30 mins before arriving home it went to 14.1/14.2 volt until home.
Start it this morning, charging at 14.3.
All batteries are charging well, no issues.
I'm just wondering why the alternator is not always charging at 14.3/14.4 stable?