First was this a 6 volt or 12 volt system? Is the gage a 6 volt gauge? If it is you need a resistor in line on the gauge if you have 6 volt gauge on a 12 volt system. If you connected the hot to the wrong side of the gauge you most likely will need a new sending unit. Just some thoughts. Keep us posted.
Last edited by 41Chevy; 12/24/2014 9:54 PM.