how to try the alternator

The other day when we walked with the car (Ford Escort 94) we stopped due to lack of battery we measured it with a voltimeter and marked less than 13V. Accelerating it marked 12.5 V then we disarmed it, we took the alternator but it cost us a day of laburo and there was a de -dried cable but now how did we try that?

You have two oppositions the easiest is to put it in the car and make it walk to see how much load it throws, it must be within 13.5 to 14.5, the other is to put the alternator in a bank feed it with 12 volts current where it corresponds to the alternator and turn it with a drill and measure the load is much easier to ride it in the vheiculo.