I am having some issues with my 99 F350. It came to me used, with two bad batteries. I replaced both of them, and have had few issues until recently. The batteries were not being charged it seems, and I swapped out the alternator, as it was only showing 6v when I checked it.
I am now having the same issue. However, the new alternator is only showing .6v or so at idle, when the other showed 6v. Is there a better way to check to see if the alternator is not functioning correctly?
Where else should I start looking? The terminals are clean, and the batteries charge up just fine on a trickle charger, so I dont suspect the connectors right now.
One thing I did notice, is that the boost solenoid was clicking very quickly when I was having starting problems. I suspect low battery power is the issue here, but I am open to checking other avenues.
Any advice here?