Ford 2003 Mustang Workshop Manual page 3110

SECTION 412-00: Climate Control System - General Information
GENERAL PROCEDURES
Manifold Gauge Set Connection
Special Tool(s)
R-134a Manifold Gauge Set
176-R032A or equivalent
1. Turn both valves on the R-134a Manifold Gauge Set clockwise to close the low- and high-
pressure hoses to the center manifold and center hose.
2. Remove the A/C charging valve cap (19D702) from the low-pressure service gauge port valve.
3. Remove the A/C charging valve cap from the high-pressure service gauge port valve.
2003 Mustang Workshop Manual