TM 9-2320-386-10 3-17 MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Table 3-1. Troubleshooting (Contd). 37. WINDSHIELD DEFROSTERS NOT OPERATING Step 1. Check adjustment of defroster control handle. Adjust defroster control handle. Step 2. Check for restrictions in defroster deflectors. Clear restriction. 38. ENGINE OIL PAN SHROUD NOT RECEIVING HEAT (POWER PLANT HEATER ONLY) Step 1. Check to see if power plant heater is operating (para. 2-28). Start heater. If inoperative, notify unit maintenance. Step 2. Check to see if power plant heater exhaust tube is disconnected from oil pan shroud. Connect heater exhaust tube. 39. ENGINE COOLANT SYSTEM NOT RECEIVING HEAT (POWER PLANT HEATER ONLY) Step 1. Check to see if power plant heater is operating (para. 2-28). If inoperative, notify unit maintenance. Step 2. Check to see if one or more coolant shutoff cocks are closed at engine. Open coolant shutoff cock(s). DEEPWATER FORDING KIT 40. FORDING CONTROL HANDLE INOPERATIVE Check to see if wire is attached to fording control valve. If not attached, notify unit maintenance.