COOLANT HEATER CONTROL BOX LIGHT CIRCUIT. (Cont)

TM 9-2350-238-20-1

2-12. ELECTRICAL CIRCUIT TROUBLESHOOTING (CONT).

Make sure MASTER switch is OFF before repairing

electrical circuits. Failure to observe his warning

could result in injury to personnel.

Step 5.

Disconnect lead 400 from coolant heater control box. Place red probe in

lead 400. Ground black probe. If multimeter indicates about 24 volts,

replace coolant heater control box. Refer to page 2-1056. If multimeter

indicates no voltage, repair lead 400 between wiring harness disconnect

and coolant heater control box. Refer to page 2-371. Connect lead.

2-328