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Compressor Lock Sensor

NOTE: Lock sensor may also be referred to as a RPM sensor.

Unplug lock sensor connector, located at A/C compressor. Measure resistance between lock sensor terminals No. 1 and 2. See Fig 1. Resistance should be 165-205 ohms at 68°F (20°C). If resistance is not within specification, replace lock sensor.

Fig 1: Identifying Lock Sensor Terminals
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