TM 5-2420-230-24-2
Air Intake Manifold Heater (010-072)
B3.9 and B5.9 Series Engines
Page 10-62
Section 10 - Air Intake System - Group 10
Turn the ignition switch to the OFF position.
Connect the thermistor wire harness.
Preheat Cycle - Check
Turn the ignition switch to the ON position.
Do not start the engine.
The solenoids should click on.
NOTE: If the engine has been running, the temperature is
probably above 15C [59F].
Digital Multimeter, Part No. 3822666
After the preheat period, the WAIT-TO-START light will go
off and not flash.
Set the multimeter scale to read DC voltage.
Connect the multimeter, Part No. 3822666, lead to the
intake manifold heater terminals. Check each terminal
individually.
L-1186