Amp gauge not working now

What prompted this was I am using a PowerMaster 75 amp alternator. They told me to use a 8 gauge wire for the power supply. I looked at the MAD threads and made the parallel connection.
I am going to bypass the amp gauge, I do not want a fire or burnt wires. I looked at the wires now and they are good. It does not bother me that the gauge does not work, it was concerning that it did not move while running. I am going to remove the wire from the back of the gauge. it is a real pain in the engine compartment.