TM 10-3930-659-10 3-5.  TROUBLESHOOTING SYMPTOM INDEX (Con’t). Troubleshooting Procedure Page TRANSMISSION Oil Temperature High (Red Zone).......................................................................................................................... 3-7 Forklift Truck Will Not Move In Either Direction...................................................................................................... 3-7 Table 3-1.  Troubleshooting. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION ENGINE 1.  ENGINE WILL NOT TURN OVER WHEN IGNITION SWITCH IS TURNED TO "START" POSITION. Step 1.  Check position of direction selector lever. Shift direction selector lever to N (Neutral). CAUTION DO NOT attempt to slave start forklift truck with battery disconnect switch  In  ON  position.    Damage  to  vehicle  electrical  system  may result (see paragraph 2-27). NOTE Use  NATO  slave  cables  and  slave  receptacle  located  on  right  rear side of forklift truck to slave start forklift truck. Step  2.    Check  position  of  battery  disconnect  switch.  If  battery  disconnect  switch  Is  In  OFF  position,  turn  it  to  ON position. Step   3.      Check   for   loose   or   corroded   battery   terminals.   If   battery   terminals   are   loose   or   corroded,   notify   Unit Maintenance. 3-4