TM-9-2320-279-20-1

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3

TM-9-2320-279-20-1 - Page 145 of 985

TM 9-2320-279-20-1

Troubleshooting Malfunctions (Cont)

Table 2-9. Troubleshooting (Cont)

M

alfunction

Test or Inspection

Corrective Action

Step 7.

Check ENGINE START switch for loose or damaged connections.

Tighten loose connections or repair damaged connections.

Step 8.

Check ENGINE START switch for 22-28 volts at BAT terminal with ENGINE switch OFF.

If no voltage, check circuit breaker No. 5 (step 10).

Step 9.

Check output side of circuit breaker No. 5 for 22-28 volts (fig. 2-2).

If voltage is 22-28 volts, harness is bad. Notify the supervisor.

Step 10.

Check input side of circuit breaker No. 5 for 22-28 volts (fig. 2-2).

If voltage is 22-28 volts, replace circuit breaker 5 (para 7-43).

Step 11.

Check ENGINE START switch for 22-28 volts at ST terminal with ENGINE START switch

to START.

If no voltage, replace ENGINE START switch (para 7-37).

Step 12.

Check neutral safety switch adjustment.

Replace neutral safety switch if not working or cannot be adjusted (para 8-4).

Change 3

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