It sounds like the AMP gauge is working then. Usually if you use the turn signals it should fluctuate. If you take the wires off one of the gauges and use a 9V battery and two leads it should move the needle. Have someone check the gauge while doing this and don't leave it on long or your risk burning the gauge out as they should use 5 volts but this is just to test. If the needle moves it's the IVR or a wiring issue and a multi meter would work.
