TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
7.
HOURMETER DOES NOT OPERATE (MODEL A ONLY) (continued).
ACCESS
COVER
VOLTAGE TEST
(1) Remove four screws and
lockwashers and access cover
from heater compartment.
(2) Remove cab control box
connector (P2) from cab control
box.
CAB
(3) Turn engine start switch to ON
CONTROL
position.
BOX
(4) Set multimeter to voltage
position.
(5) Place positive (+) probe of
multimeter on position D of cab
control box connector (J2).
CAB CONTROL BOX
(6) Place negative (-) probe of
CONNECTOR (J2)
multimeter on known good
ground, and check multimeter
for voltage reading.
(7) Turn engine start switch to OFF
position.
CAB CONTROL BOX
CONNECTOR (P2)
4-125
Change 1
