Cooling fan relay
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Senior Member
Joined: Jul 2011
Posts: 386
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Cl65 AMG
Cooling fan relay
This looks like the cooling fan relay/controller is that correct ? I was thinking some of ya might grab control of the fan differently than the factory does. I don't mean powered up all the time but maybe link an external controller along with leaving the factory still contacted in case of the add-on failure. I haven't tried anything yet, Computer controlled car sometimes get angry when you tie something in on top of the factory system/wiring. I have systems push codes and warnings out when doing this. I've seen the thermostat up grade and don't understand how it works. or why it could be so costly / ? 
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Joined: Jan 2004
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From: Del Mar, CA
2003 CL600 2005 745Li
Thread Starter
Senior Member
Joined: Jul 2011
Posts: 386
Likes: 12
Cl65 AMG
Hey,
I've seen this thermostat "thing". A thing because its a mystery to me how its designed and how its so special. Yes it lowers the opening temp but since I haven't seen inside the unit in my own car maybe I need to do that first. I'm a builder not a buyer at the core so thats the reason I'm so interested.
Now back to my original question the fan relay/controller ?
I've seen this thermostat "thing". A thing because its a mystery to me how its designed and how its so special. Yes it lowers the opening temp but since I haven't seen inside the unit in my own car maybe I need to do that first. I'm a builder not a buyer at the core so thats the reason I'm so interested.
Now back to my original question the fan relay/controller ?
