i have a 75 3/4 ton 4x4 it has a factory amp gauge and the wires for it are 16 gauge with a fuse link in both with 30amp fuses in them...i know wire and amp loads( i work with them everyday) and i can't understand how this could have ever worked without melting the wires in to!!!....i wired to the # 2 wire off the alt to power and it drains the bat down and i know what it dose that.....then i tryed running it though the main power feed to the fuse box and it won't let the truck start( wire to small)...so i'm at a loss on what to do next...anyone seen this before?