hey guys I replaced the alternator and the voltage regulator. the battery still isn't charging. does anyone have and suggestions in terms of diagnosis/troubleshooting that I should try? thanks everyone.

 

So we have some idea of where we are,
Where and how are you determining the charging system is not working?
Are you going by the meter in the dash, measuring at the alternator, battery ?
What is the condition of the battery and connections, if any high resistance, alt output goes down.