Try to turn on all 12 volt lights, the fan should run pretty much full speed continuely, then turn about half off, should slow down, then turn all off, should quit or go very slow, depending on the temp around the converter. The fan has circuit has a rheostat to speed and slow the motor to keep the transformer cooled down to an certain temp..............Ron
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Ron
99 Freightliner FL70 Western Hauler CC 300 HP Cat/Chipped/ Allison Auto
12 Montana 3800RE/Level-Up Auto Leveling/Slide Toppers/MorRyde Hitch/VuQube 2000
01 F350 7.3 PSD Crew Cab DRW 4X4 6 Speed/Chipped
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