TM 55-1730-229-12
AC 320A0-OMM-000
TO 35C2-3-473-1
TM 1730-12/1
Organizational Troubleshooting (continued)
Table 4-2.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
(continued)
71.
Step 7.
Set DC POWER and MASTER switch off, and disconnect battery. Test
diode TB3-CR4 (malfunction 82).
a. Replace diode if defective (paragraph 4-33.b).
b. If diode tests good, replace wire G26A20 between diode
(TB3-12 CATHODE) and K3-X2 (6, figure 4-18) (see FO-8).
c. Perform operational check.
DO NOT TOW INDICATOR DOES NOT LIGHT WHEN TOW BAR IS LOWERED AND CLUTCH LEVER IS
72.
ENGAGED. See TM 55-1730-229-34 (paragraph 10-6, step 7).
Press to test the tow bar indicator.
Step 1.
a. If indicator does not light, go to step 3.
b. If indicator lights, continue with step 2.
Disconnect battery. On speed/direction control assembly (5, figure
Step 2.
terminals 5 and 9 (see FO-8).
a. If no continuity, replace wire (G28A20 or G29A20), and
perform operational check.
b. If continuity checks good, mercury switch, or light switch
in speed/direction control assembly is defective. Notify
maintenance supervisor.
Check fuse F1 on lower electrical tray.
Step 3.
Disconnect battery.
a. Replace fuse if defective, and perform operational check.
b. If fuse is good, do step 4.
Step 4.
Check wiring between terminal 6 on speed/direction control assembly
(see FO-8) and shunt R3 (see FO-1).
a. Replace any defective wiring, and perform operational
check.
