Fluorescent Dye Injection - Using a Dye Injector Loop Kit

WARNING: This page is about a different car, the 2003 Ford RV Cutaway, 2003 Ford Econoline, 2003 Ford E550 Super Duty, 2003 Ford E450 Super Duty, and 2003 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Before using the R-134a fluorescent dye injector for the first time, refer to the equipment manufacturers instructions on evacuation of non-condensable gasses from the hoses.

NOTE: Refrigerant system pressure should be between 413-551 kPa (60-80 psi) at 24°C.

Verify that the valves on the special tool are closed.

Fig 1: Verifying Valves On Special Tool
Courtesy of FORD MOTOR CO.
Fill the special tool reservoir with 7 ml (0.25 oz) of fluorescent dye.

Fig 2: Filling Special Tool Reservoir With Fluorescent Dye
Courtesy of FORD MOTOR CO.
Install the special tool between the high-pressure and low-pressure service gauge port valves.

CAUTION: Make sure all tools and hoses are clear of the engine cooling fan and drive belt before starting the engine.

Start the engine.
Open the high-pressure service valve.

Fig 3: Identifying Open High-Pressure Service Valve
Courtesy of FORD MOTOR CO.
Open the special tool valves and inject the fluorescent dye into the refrigerant system.

Fig 4: Locating Open Special Tool Valves
Courtesy of FORD MOTOR CO.
Close the high-pressure service valve to allow the pressure inside the special tool to equalize with the suction side of the refrigerant system.

Fig 5: Identifying Close high-pressure service valve
Courtesy of FORD MOTOR CO.

NOTE: Close the valves on the special tool while the A/C compressor is operating.

Fig 6: Identifying Close Valves On Special Tool

Courtesy of FORD MOTOR CO.

Close the valves on the special tool.

NOTE: Leave all valves on the special tool closed when not in use.

Disconnect the high-pressure and low-pressure service valves and remove the special tool from the vehicle.