This is a brief video showing a basic controller and wiring needed to operate and test run a PWM or other PWM device. Final install will be controlled by a Holley Terminator X, but this $10 PWM Generator is a great test bench to determine the operating parameters of the device you intend to control. The truck featured is a 1978 Chevrolet K20, with a 2003 5.3L engine, original SM465 transmission, and original NP205 transfer case. The fan is sourced from a 2010-2012 Ford Fusion.