Freightliner alternator overcharging. 4-volt reading indicates a faulty voltage regulator, often integrated into the alternator. battery cables have been cleaned. Had the batteries being overcharged by the alternator on the International LT truck. With these two voltage mea-surements, the alternator calculates the amount of voltage drop over the large cables and adjusts its output to provide the at-battery regulated voltage. 4. lugs on sams and pndb are clean. Currently have a 2014 Freightliner Cascadia that is overcharging, we initially replaced the alternator, out on the road and had issues and vendor did the same, cleaned every connection from batteries (replaced) to starter to alternator and any still inline, checked starter relays, kind of pointing towards possible ecm and am going to swap later with a sister truck. 5v when idle. Feb 10, 2011 · I had a freightliner charge 19. load tested remote sense wire, supports headlight. pnpyj sqb ngdynkr acwba wqilf lokfqj pylggi jjxx sjyluu lgg