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Old 03-29-2016, 12:33 PM
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How a PWM signal work.

Not a BMW, but it shows how other manufacturer like Chrysler uses a PWM signal to control their radiator fan. I wonder if you could use that Chrysler relay with a Spal fan so you don't have to buy the over priced radiator fan.

https://www.youtube.com/watch?v=winfXPvjtgQ
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Old 03-29-2016, 04:08 PM
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He says that the Chrysler uses a PWM ground signal where the BMW uses a positive PWM. Would need to find out what the base frequency for the PWM is also, they'd have to match.
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Old 03-29-2016, 04:24 PM
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Quote:
Originally Posted by jcp240z View Post
He says that the Chrysler uses a PWM ground signal where the BMW uses a positive PWM. Would need to find out what the base frequency for the PWM is also, they'd have to match.
I believe the pwm signal used by BMW is also a negative signal.
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2006 Infiniti G35
2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD
Lotus Europa 1970 Destroyed by fire
Lotus Europa 1970 S2 Renault Powered
Lotus Type 52 1970 Twincam Webers Powered
PORSCHE 911 Targa 1982 The Garage Queen
Audi Avant donated to Kars for Kids
BMW 525IT Sold
Audi 4000CS Quattro Sold
Jensen Healey Lotus Powered Sold
Opel 1900 Sold
Triumph Spitfire 1971 Sold
Triumph Spitfire 1968 Sold
Plymouth "Cuda" 340 Six pack SOLD
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