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meter and resister connected? what resistor? So I have to unplug it from the motor?
The 50k resistor mentioned in the instructions for testing the cap. Yes, disconnect all leads from the cap. Unless your meter has capacitor testing capability, you have to place the resistor in series with the cap. So, one meter lead to one cap terminal. One lead from the resistor connected to the other cap terminal, and second meter lead connected to other resistor lead.
 

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The cap is almost certainly dead, and caps are cheap. Test the compressor windings. With all leads disco'ed, use ohmmeter to check from C to S, and then from C to R. If you have continuity (it will basically be sero ohms), then check from C to the shell of the compressor. That should be open (infinite resistance). If both these are true, your compressor is probably OK. Could be bad mechanically, but that's less common than a burnout. Hope that's the case!
 

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As I said before, you MUST place a resistor in series to test it with an ohmmeter.

Forget the cap, test the compressor windings. If the compressor is good, you need a new capacitor, new wire leads (with correct ampacity and insulation rating for the load), possibly a new contactor (contacts can be burned or welded). You should also check the power supply wiring to the unit, as undersized wire could have contributed to the problem.
 
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