Heater help... (1 Viewer)

Ming89FJ62

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Did the measured voltage change when you switched speeds at the switch? You should see three different voltage values depending on the switch setting. I would check voltage on both sides of the resistor with the switch set to the highest setting which has no resistance. Voltage should be the same. When you measured 10.47V was the truck running? That could explain the value.
 

Ming89FJ62

Pig farmer extraordinaire
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The AC amplifier let’s you adjust the engagement of the AC based on RPM. It has nothing to do with the fan speeds
 
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Truck was not running at the time. I’ll try to measure values Wednesday when I get back out there.
 

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