TROUBLESHOOTING THE HMMWV - OD1616 - LESSON 1/TASK 2
Step 2.
With the rotary switch in the START position, check for
battery voltage on lead 74A at the starter.
If battery voltage is
present, replace the starter, following the procedures in paragraph
4-8 of the TM.
WARNING
The negative battery cable must be disconnected
before
disconnecting
any
harness
from
the
protective control box, or injury to personnel
and/or damage to equipment may result.
Step 3. Disconnect lead 14B from the neutral start switch and check
for battery voltage at the neutral start switch lead 14 with the
rotary switch in the START position. If battery voltage is present,
disconnect the negative battery cable from the battery, both cannon
plugs from the protective control box, and lead 74A from the starter.
Ground lead 74A and check pin I on the engine wiring harness cannon
plug for the control box. If continuity is present, check lead 14B
on the neutral start switch to pin A on the body wiring harness
cannon plug for the control box.
If continuity is present, replace
the protective control box following the procedures in paragraph 4-5
of the TM. If continuity is not present, repair the wiring harness
following the procedures in paragraph 4-62 of the TM. If the wiring
harness is beyond repair, notify IDS/IGS maintenance. Reconnect the
protective control box cannon plugs, neutral start switch lead 14B,
starter lead 74A to the starter, and the negative battery cable to
the battery.
Step 4. Disconnect lead 14A from the neutral start switch, and with
the rotary switch in the START position, check for battery voltage at
lead 14A. If voltage is present, check the neutral start switch for
continuity.
Ensure that the neutral start switch is activated
mechanically.
If continuity is not present, replace the neutral
start switch following the procedures in paragraph 5-5 of the TM.
Next, reconnect the neutral start switch leads 14A and 14B.
Step 5. Disconnect the rotary switch lead 14A and, with the rotary
switch in the START position, check for battery voltage at terminal
S. If voltage is
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