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Old 09-25-2018, 03:12 AM   #9
flybouy
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Join Date: Oct 2011
Location: Joppa, MD
Posts: 11,752
If the fan is 12vdc it should not run unless the unit is providing 12vdc and sufficient heat builds up to trigger the thermistor or whatever device is used to activate the fan.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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