555D Ford backhoe electrical problem

[JCSNET]

I have a 1996 555D Ford Backhoe.I recently had the alternator rebuilt and the battery replaced. When I check the battery voltage with the engine running it does not indicate that it is charging the battery. It appears that a wiring problem is not allowing any voltage to get to the alternator telling it to charge the battery. I have read that possibly the ignition switch or the Temp sensory in the battery box may be the culprit. Can anyone give me advice how TO diagnose the problem to determlne why no voltage is going to the alternator. Any help would be greatly appreciated >> Thanks Cliff