squonk 46,322 #1 Posted 2 hours ago Restoring a tractor? Painting an engine? Watch this video on why you need to have clean metal (no paint) for your grounds and how it effects engine cranking, 3 1 Share this post Link to post Share on other sites
ri702bill 12,005 #2 Posted 1 hour ago The electric engine fan on our old 1989 Old Cutlass Ciera stopped working. It would always come on when the AC was switched on, but no more. Jump the connector & it works fine.... There was a long threaded stud on the lower front of the engine with about 4 stacked ground wires, a washer & nut. Ahha - it was a fuzzy white color, not shiny metal. disassembled the stack, cleaned both sides of all the lugs & mount, and reassembled. A good smear of dielectric grease over them, ploblem solved... Looks like it was a poor choice in the ground location, open to road splash. 2 Share this post Link to post Share on other sites
953 nut 65,680 #3 Posted 31 minutes ago (edited) Unfortunately many people do not understand that an electrical circuit needs a return path to work. Electrons can't just flow out (potential energy) and do work, they need to go through the device (light, motor, etc.) and back to the battery to do work. Edited 29 minutes ago by 953 nut 1 Share this post Link to post Share on other sites
