I am wondering if I need to run a heavier gauge wire to my fuel pump. I am currently running 14 gauge wire all the way to the back of my truck where the pump is located. So I am running the fuel pump power from the firewall down to the frame all the way back to the rear tires or so. Should I rewire with 10 gauge? I recently picked up some 10 gauge for nothing so I have the wire. You can hear my fuel pumps output increase and decrease with the output of my alternator. When the motor is running more RPM and the alt is pumping more amps the fuel pump runs stronger, when the alt speed drops the fuel pump does too. Thanks Harley P.S. the alt is reading fine on the volt gauge. 14 volts or so of output.