A/C Hoses, Low Pressure Switch, Check & Replace

A/C refrigerant hoses, checking

On vehicles up to VIN 44F 000 000,

- inspect A/C refrigerant lines for wear spots and leaks
- replace A/C refrigerant lines if necessary

CAUTION

When replacing A/C refrigerant hoses, use hoses manufactured after the 20th calendar week of 1984. The date of manufacture 20/84 is stamped on the hoses.

A/C refrigerant low pressure switch

If A/C compressor clutch cycles on and off more than 2 or 3 times per minute when outside temperature is approximately 68~F (20~C)

- check A/C refrigerant low pressure switch as follows:

- remove electrical connector from A/C refrigerant low pressure switch and bridge terminals
- check cooling vent temperature and refrigerant pressure

If temperature and pressure are within tolerance, - replace A/C refrigerant low pressure switch

REFRIGERANT LOW PRESSURE SWITCH:

Note

Low pressure switch can be removed without discharging A/C refrigerant system

- remove wire connectors for low pressure refrigerant switch
- remove refrigerant low pressure switch

- lightly oil new "O" ring with refrigerant oil and install in groove (arrow)
- install new refrigerant low pressure switch, Part No. 443 959 483C

- check center vent outlet temperature If temperature at center vent is too high and refrigerant pressure too low, - re-charge A/C refrigerant system
- repeat measurements

If measurements are not obtained
- Check Repair Manual, Group 87 for additional troubleshooting hints
5. Improved terminal connectors, install

On vehicles from March 1985 production up to VIN 44F 100 624

- check fresh air fan connectors and terminal ends for tightness

- remove middle console
- locate yellow 4 point connector for fresh air fan
- pull connector apart

- locate BK/BL wires in each connector half
- remove BK/BL wires from connector halves
- cut terminals from BK/BL wires
- crimp new terminals to wires (Part Nos. N 902 644.02 and N 17 462.3)
- install BK/BL wires into new connectors (Part Nos. 443 971 959 and 443 971 958)

Note

Yellow 4 point connector will now have 3 pairs of wires. BK/BL wires from yellow 4 point connector will now have separate connector.