Bypassed AmMeter on 63 dart, now I get nothing

I guess I've been lucky and haven't had any problems with the ammeter itself. Bulkhead connectors, yes, an ammeter gauge, no........well except for the '75-80 Dodge pickups.....and even then it's as much fault of the gauge as it is the plastic instrument cluster housing. Now you get into aftermarket add-ons and high powered alternators, and you're talking a whole different problem.