Compressor
The low pressure switch is probably the problem.... the safest way is to start injecting freon into the system, the a/c compressor is going to switch on and off frequently but it will eventually come around, and work properly.
The other way is to install a jumper wire across the lower pressure switch and it will activate the compressor.
The other way is to install a jumper wire across the lower pressure switch and it will activate the compressor.
Are you sure the a/c compressor clutch is good? Unplug the low pressure switch and take a single wire and go from one of the pins to the low pressure switch to the other. Making a complete circuit between the two pins.
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There is a clearance specification for the clutch. Also if the compressor clutch connector is 2 pin.. then it probably needs ground at the other pin to activate. If its a single pin connector. Make sure your grounded to the motor properly... ie... a painted a/c compressor may not ground properly.
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