low/no charging

These Mopar alternators are very simple to trouble-shoot. You have full access to the interface between the Vreg and the field. You can measure what the Vreg applies to the field, and can even apply your own voltage across the field (w/ jumpers from battery). You even have an ammeter in the dash to measure the output current (if that still works). There are many, many posts here giving detailed testing instructions and a multimeter is free at Harbor Freight. If you don't understand basic electricity, there is youtube and wikipedia. If anybody won't follow thru, take your car to an auto electric shop and quietly pay whatever.