| Resistors
Try it with one pack of 2 10 ohm ceramic resistors. One in series for a medium speed and two in series for a slower speed.
You will find that they don't get very hot. Ten ohms with the fan motor in series is going to drop less than a watt. A 10 ohm, 2 watt resistor would do just fine. I used the 10 watt because it was available and barely gets warm.
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John W. Irwin
2005 Classic 28 "Sabre-Dog III"
2007 Silverado 2500HD Duramax/Allison LTZ
WBCCI Region 9 Webmaster, #9632
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