My batteries wouldn't charge so I wired in a external voltage and it worked for 6month then quit charging again , this time the alternator was bad.

What is your question?

I had a Chrysler town country van here , I used the alternator off of it to put in my truck that's a 97 ram 3500 cummings. Now it shows to be charging but does not , when I turn the truck off it is completely dead. So I wired it in without the VOLTAGE REG(RV) and it shows to not be charging on gauge untill I turn the key Off and the it goes up to 14 but the truck doesnt shut off I have to uplug the fuel solenoid valve get It to shut off. But know the fuel pump thats wird to the ignition cicuit stays on