Contour Fan Setup using a PMW fan controller HD

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/ref=cm_sw_r_cp_api_glt_fabc_YX3D9VYB0SPR12GKDJZP?_encoding=UTF8&psc=1