Yes, it should be on the charge side when running. An easy way to verify if your charging system is working is to unhook the positive battery terminal while the car is running. If it stalls your charging system isn't working. Keep in mind that your amp gauge is an integral part in your charging system. Also, in an external regulator system, 9 times out of ten the problem is the voltage regulator. A lot of the time the problem is the connection to the regulator.
