TM 9-2320-363-20-1
Table 3-1. Troubleshooting (Cont)
Malfunction
Test or inspection
Corrective action
POWER TAKE-OFF (PTO) CIRCUITS (ALL EXCEPT M915A2) (CONT)
Step 3.
Disconnect power take-off neutral lockout relay from connector. Check for
continuity between connector 86 and ground.
If continuity is indicated, go to step 4. If no continuity is
indicated, repair ground lead (page 3-2).
Step 4.
Disconnect power take-off neutral lockout relay from connector. Install jumper
leads between connectors 30, 85, and 86 to their respective connections at
power take-off lockout relay. Check for +12 VDC at connection 87 on power
take-off lockout relay.
If +12 VDC is present, go to step 5. If no voltage is present,
replace power take-off lockout relay (pages 4-197, 4-198).
Step 5.
Disconnect lead D510C from winch speed control switch on winch. Check for
+12 VDC at lead D510C.
If +12 VDC is present, go to step 6. If no voltage is present,
repair lead D510C (page 3-2).
Step 6.
Disconnect lead D510C and lead D510D from winch speed control switch on
winch. Check for continuity between contacts of power take-off rpm switch
with switch closed.
If continuity Is indicated, go to step 7. If no continuity is
indicated, replace winch speed control switch on winch
(page 4-276).
Step 7.
Disconnect lead D510D from rpm control module potentiometer located just
above vehicular fuse/relay panel. Check for +12 VDC at lead D501D.
If +12 VDC is present, go to step 8. If no voltage is present,
repair lead D510D (page 3-2).
Step 8.
Disconnect power take-off relay rpm control module potentiometer from
connector. Check for 9 to 11 kohms between yellow and black wire.
If 9 to 11 kohms is not present, replace potentiometer.
TRANSFER CASE (ALL EXCEPT M915A2)
1. TRANSFER CASE DOES NOT ENGAGE.
Step 1.
Check transfer case shift control, shift control cable, and shift control linkage
for damage, looseness, and proper adjustment.
Replace any damaged transfer case shift control, shift control
cable, or shift control linkage (page 4-376). Adjust shift control
cable (page 4-342).
Change 3 3-83
