DRIVER'S HEATER CONTROL BOX LIGHT DOES NOT OPERATE WHEN PRESS- TESTED

TM 9-2350-238-20-1

2-11. TROUBLESHOOTING INFORMATION (CONT).

Table 2-3. UNIT TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2.

Troubleshoot coolant heater control box light circuit. Refer to Electrical Circuit

Symptom Index, page 2-92.

Step 3.

Troubleshoot coolant heater circuit. Refer to Electrical Circuit Symptom Index,

102. DRIVER'S HEATER CONTROL BOX LIGHT DOES NOT OPERATE WHEN PRESS-

TESTED.

Troubleshoot driver's heater control box light circuit. Refer to Electrical Circuit Symptom

103. DRIVER'S HEATER FUEL PUMP DOES NOT OPERATE AND DRIVER'S HEATER

CONTROL BOX LIGHT IS ON.

Troubleshoot driver's heater fuel pump circuit. Refer to Electrical Circuit Symptom Index,

104. DRIVER'S HEATER DOES NOT OPERATE AND DRIVER'S HEATER CONTROL BOX

LIGHT IS ON.

Step 1.

Check driver's heater ground for bad connection.

Clean ground connections with crocus cloth (item 10, appx C). Tighten

ground connections.

Step 2.

Troubleshoot driver's heater circuit. Refer to Electrical Circuit Symptom Index,

105. PYROMETER INDICATES NO TEMPERATURE GAIN AND AIR BOX HEATER OPERATES

NORMALLY.

Troubleshoot pyrometer circuit. Refer to Electrical Circuit Symptom Index, page 2-92.

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