Using Tracer Dye

SPECIAL TOOLS

NOTE:
^ Ford Motor Company now produces vehicles with R-134a Leak Tracer Dye incorporated into the A/C system. The exact location of leaks can be pinpointed by the bright yellow-green glow of the the tracer dye. Since more than one leak may exist, always inspect each component. If it is necessary to add dye, use Dye Injector. A/C systems require 7.39 ml (0.25 oz) of Fluoro-Light/P Fluorescent Tracer Dye 164-R3712.
^ Some vehicles may have signs of refrigerant oil at the spring lock couplers. This may be caused from the assembly process which applies to the fittings before installation to aid in assembly. When a spring lock coupler is suspected of leaking, always wipe the fitting clean and verify the leak with R-134a Automatic Calibration Halogen Leak Detector.

1. Check for leaks using 120 Watt UV Spot Lamp.
2. Scan all components, fittings and lines of the A/C system.
3. After the leak is repaired, remove any traces of leak dye with a general purpose oil solvent.
4. Verify the repair by operating the system for a short time and inspecting with the UV lamp.