TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Air Intake Manifold Heater (010-072)
Section 10 - Air Intake System - Group 10
Page 10-61
Maintenance Check (010-072-008)
Check the battery voltage.
Minimum: 6.5 VDC
Check the thermistor.
Disconnect the thermistor.
Turn the ignition switch to the ON position.
NOTE: The WAIT-TO-START light should come on.
The solenoids should click on.
Wait 20 seconds.
The solenoids should click off.
The WAIT-TO-START light should begin flashing.
NOTE: The WAIT-TO-START light will flash, indicating an
open circuit in the thermistor wiring. Disconnecting the
thermistor simulates this condition.
L-1185