Not charging but alternator is good.

[1badexplorer]

I've having problems with a 99 mercury mountaineer with a 4.0 sohc. It isn't charging. I've had the alternator tested at 3 different places and they all say it is fine. I've tried 2 battaries thinking it had a broken cell or something. the fuse is good. The connnections on the alternator are clean and good. Is there any commonly known problems that can cause this or do I have a broken wire somewhere? I just figured I'd post here before I start doing continuity tests.

 

[kimcrwbr1]

Read this all the way thru and attack with the VOM.

http://www.therangerstation.com/tech_library/chargingsystem.htm

 

[Bryan22]

i'd start by tracing the hot lead from the alternator. if that all checks out, start looking for a bad ground. It should be something pretty obvious. Maybe a bad battery cable.