A/C - No High Pressure Service Port
88buick09 Bulletin 88-1-13Date June, '88
Ref.No. 88-166-1
Corp. Ref. No. 871203R
SUBJECT: SKYHAWKS WITH NO AIR CONDITIONER HIGH PRESSURE SERVICE PORT
MODELS AFFECTED: 1988 SKYHAWKS WITH LL8 2.OL L-4 ENGINES (VIN CODE 1) AND C60 AIR CONDITIONING
If a high side pressure reading is required for diagnostics, remove the high side-high pressure control switch from the compressor/condenser hose assembly. The wiring harness MUST REMAIN CONNECTED to the switch. The switch port may then be used for high side gage fitting for diagnostics.
Do not use the port on the liquid line, as this is now a low side port with the expansion tube located in the condenser.
Carefully reinstall the hi-side pressure cut-out switch to avoid any refrigerant leak. If a leak occurs, the technician should check to assure that the switch O-Ring is present and then use a tire valve tool to tighten down the valve. If the leak persists, evacuate the system, reinstall the switch, and recharge the system through the low side port, per published procedures.