A/C Fan

The A/C fan in my wifes car is not coming on. There is power to it I used a test light to check the wires. Is there and easy way to test the fan to make sure it is not working before I replace it. Can I just run a jumper
wire to the positive side of the fan? Or do I need to run a power and a ground. Never done it so I figured I better ask before I screw somethin up. Easy to get the info 1st instead of regreting after!!
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Do you have 12 volts across the fan motor or are you just measuring from the fan wile to ground? If 12 volts across the fan the motor is bad If 0 volts across the fan and 12 volts to ground the ground circuit is open...

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mvarcola wrote:

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Provide +12 and negative to the fan (disconnect it from the Honda while testing). Don't worry about polarity, you only have to do it for a second to see if it works. I use a little 12 v. battery from a motorcycle or alarm system for such tests. Portable. 'Curly'
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I was having the same problem with the AC fan in my 1994 Accord. It would come on if I tapped on the shroud but would shut back off after a few seconds or would run weak. I knew then it was most likely the fan motor - probably the brushes are very worn. So, in an attemp to put off having to buy a new motor, I took it out and sprayed WD40 into a little hole in the side of the fan motor - not what I can recommend for everyone. Anyway I plugged the motor back in and it ran strong - no more off and on stuff. Put the whole assembly back together and it's been working fine ever since then.
James

a
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Thanks for all of your help. I just tapped on the fan motor and it kicked back on. But of course the a/c is still not blowing cold. So time to keep digging!!
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