PWM testing Mercedes-Benz 2001 c320 radiator fan

This Temic fan works with a 10-16hz square-wave 12v PWM signal on the blue/green wire, outside of that frequency it runs full speed. The black/white & red get connected to 12v, brown to ground. No relay required, just a large fuse (60A+). Fan will run full speed if it loses the blue/green signal, but will NOT run if the black/white wire gets disconnected.

Off = 6-10%
Low = 16%
High = 90-99%
Failsafe = 0-5% or grounded

17x25.5" = Inner shroud dimensions
19.75x27x3.5" = With the upper bulge, not inc. tabs

Notes: This motor uses 4 power wires. BMW also uses Temic fan controllers, so they might have similar PWM parameters.

Видео PWM testing Mercedes-Benz 2001 c320 radiator fan канала Hydrocarbon82