Can you be a little more specific? What exactly is the problem? Is the fan not coming on when the air conditioner hits its pressure limits? I assume the fan is working fine if it turns when you apply voltage to it.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record