At rear of HEATER ON/PURGE ON switch S4 (49) remove the five
HEATER ON/PURGE ON
machine screws (50) and washers (51 ) from terminal lugs. Disconnect
switch S4 (49)
wires identified as 3, 9, 10, 11, 12, 14 and 22.
Machine screws (50)
Washers (51)
TM 3-4230-209-20&P
2-145
