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OK, your way off here. You don'ty have an amp reading at all. You can't rely on the dash gauge. You need a digital voltmeter and read accross the battery with the engine idling and no accessories on. You should have between 13.5 and 14.8 volts.
You also need to fully charge the battery before doing this test and the battery alone should have over 12.2 volts.
If you do all this and the reading is too low, then you likely have a bad ECM (engine control module). That's where the voltage regulator is.
This is what I already told you.
The engine control module is the computer.
Volts and Amps are 2 different measurements of electricity. They are measuring different things.