My 00 1 ton voltage guage started dropping to zero a few days ago. Since then I have changed the alternator, crank sensor and its still the same. The connections on the alternator seems good and I have also unplugged the heater grid with no results. Where should I go next? Thanks for the help in advance.

 

Ok nevermind. Looked into the plug on the back of the alternator a little further and found one of them that looked broke. I thought that i had checked them good but I guess not. Probably needed a new alternator soon anyway, it was still original with 192000 on it.