How do I make a fan switch to mount on the dash? The mechanics at the lot I bought it from rigged a wire from the fan and one from the battery and they would alligator clip it to the ebrake pedal. The day i bought it it nearly caught fire. The temperature Guage is inaccurate so I would like the switch to control it myself. What do I need to fix the temp guage? I plan to make this a problem solving day, if the rain holds off.