Electric cooling fans have become a mainstay when it comes to keeping any type of project vehicle's engine cool. Painless Performance F5 electric fan controllers are state-of-the-art! They include an underhood rated solid-state pulse width modulation controller, a 3/8 in. NPT threaded temperature sensor, large gauge fan wires, a labeled vehicle integration wire harness, mounting hardware, and a fuse and connectors. They can control one large fan from 50 percent up to 100 percent, depending on your engine temperature. Painless F5 electric fan controllers include a 3-position toggle switch that gives you manual control of the cooling fans. Position one is 100 percent fan-on, position two is normal operation, and position three is 0 percent fan-on or fan-off.