General overview of installing a PWM type controller on a contour dual fan unit on my 1988 Mustang LX. This would be used with an arduino-type controller or with an aftermarket EFI setup utilizing PWM control of a fan

I tested this particular controller from 500Hz down to 128 hz and it still functioned. Would not respond at all under 128hz.

This module is PWM+. If you wish to run PWM- you’ll need to invert the duty cycle where 100% is off.

Latest Infiniti fan controller: 21493-B210B

Latest Mazda controller : 21493-C370B


PWM generator for testing purposes: Frequency Generator, DROK DC 3.3V-30V 5-30mA 1Hz-150kHz Adjustable Output PWM Pulse Duty Cycle Square Wave Function Signal Generator Module https://www.amazon.com/dp/B07P848DYQ/...


Demonstration Megasquirt hookup

   • Megasquirt controlling INFINITI PWM f...