Overboost Protection Switch
- With air pressure regulator still connected to "Y" connector, move ohmmeter leads to electrical connector terminals 1 and 2. Ohmmeter should give an infinity reading. See Fig 1.
- Slowly apply air pressure to regulator and check that switch makes an audible click at about 9 psi (.63 kg/cm2 ) and ohmmeter reads 0 ohms. If not, replace overboost protection switch (color coded Black).