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Discussion Starter · #1 ·
Just found out you can turn on both radiator fans by turning on the windshield defroster. Even on low setting it will start both fans. I pull a small homemade teardrop trailer (under 400 lbs) (really ), and don't like the coolant temperature raising when I get near my camping spot, so I kick it on at the bottom of the hill. (I use a scanguage II for actual temp)...
 

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Discussion Starter · #3 ·
I just sent my ob2 scanguage in to have a software update and it won't be back till next week. I had the same drop as you (200+ to 175) by putting the car heater on full blast. I didn't know then that the defroster would also turn on both radiator fans too. Did not want to use the air conditioner on a hot day going up a hill just to turn the fans on. Just found out a couple days ago about the defroster. Plus you have the heater fan on, also pulling heat away from the engine...
I will experiment more next week when I get my scanguage back.
 
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