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I have a 70 Elky with air. My fan works fine when I select the # 1, 2, or 4 position. When I select the third position, the fan stops entirely. I just replaced the switch with a new one yesterday. Is there another relay that may be defective?

Any Ideas?.

Mike
 

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Out under the hood, over on the pass side, where the evaporator box is located, there are some connectors going to that box. One of these is a board with a bank of resistors inside the box. Unplug the wire harness, remove the part and check to see if one of the resistors is burned apart. This is where I would start looking. Power from your switch goes to these resistors, and then just one large orange wire goes to the blower motor itself.

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Tom Parsons
 
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