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the refrigerant system pressure exceeds 3100 - 3375 The fitting for the A/C high pressure switch on the A/C discharge line is equipped with an O-ring seal OPERATION The A/C high pressure switch is electrically con- nected in series with the A/C low pressure switch The A/C high pressure switch contacts open when the A/C discharge line pressure rises above 3100 to The A/C high pressure switch is factory-calibrated and cannot be adjusted or repaired and, if faulty or DIAGNOSIS AND TESTING A/C HIGH PRESSURE SWITCH Before performing diagnosis of the A/C high pres- sure switch, verify that the refrigerant system has For circuit descriptions and diagrams, refer to the appropriate wiring information. The wiring informa- (1) Disconnect and isolate the negative battery cable. (2) Disconnect the wire harness connector from the A/C high pressure switch. (3) Check for continuity between both terminals of the A/C high pressure switch. There should be conti- REMOVAL NOTE: It is not necessary to discharge the refriger- (1) Disconnect and isolate the negative battery cable. (2) Disconnect the wire harness connector from the A/C high pressure switch (Fig. 18). (3) Remove the A/C high pressure switch from the A/C discharge line and remove and discard the INSTALLATION NOTE: Use only the specified O-ring as it is made (1) Lubricate a new rubber O-ring seal with clean refrigerant oil and install it on the A/C high pressure (2) Install the A/C high pressure switch onto the A/C discharge line. Hand-tightened the switch securely. (3) Connect the wire harness connector to the A/C high pressure switch. (4) Reconnect the negative battery cable. Fig. 18 A/C High Pressure Switch - Typical 1 - A/C SUCTION LINE 24 - 22 CONTROLS TJ A/C HIGH PRESSURE SWITCH (Continued) |