(1) Disconnect pressure switch connector.
(2) Using jumperwire, attach harness end
of pressure switch wire to a known
(a) If LOW AIR light goes out, turn
OFF ENGINE switch and replace
pressure switch (Para 13-10).
(b) If LOW AIR light remains on,
pressure switch is OK.
(3) Turn OFF ENGINE switch
PRESSURE SWITCH TEST
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical
circuits, a direct short may result. Damage to equipment, injury or death to personnel may occur.