Im sorry if this has been asked before but I haven't found anything on this question. I am electrically challenged so wiring is done by the monkey see monkey do method at my house.I have a stock 57 3100 with a 235 (newly rebuilt). My factory temp gauge is dead so I decided that I would install a new under dash gauge so I could actually see what the engine temp is. I understand where the sender wire goes-to the new sender. The ground to a screw under the dash. Where should I wire the positive? Is there a fuse box on this truck? Should I wire it to the ignition switch? I haven't even looked at the light hook up on this yet.I really want to see what my engine temp is. I haven't hooked one of these up in 30 years!! :confused: