TM 55-2210-224-12
Table 4-2. Unit Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE (cont)
13. HEADLAMPS DO NOT OPERATE WITH HEADLIGHT SWITCH IN THE ON POSITION. (cont)
Step 3.
Use a multimeter and check for a defective switch.
Replace defective switch (para 4-29).
14. CAB, COWLING, ELECTRICAL EQUIPMENT CABINET, AND STEP LIGHTS DO NOT OPERATE WITH
SWITCHES IN THE ON POSITION.
Step 1.
Check each light for a defective lamp.
Replace defective lamp (para 4-33).
Step 2.
Check each light for a loose connection or a broken wire.
Tighten loose connection or repair broken wire.
Step 3.
Use a multimeter and check each light for a defective switch.
Replace defective switch (para 4-29).
Section V. UNIT MAINTENANCE PROCEDURES
4-9 UNIT MAINTENANCE INSTRUCTIONS.
a. General. This section provides instructions for inspection, service, replacement, or repair of assemblies and
subassemblies of the locomotive. Each maintenance procedure contains step-by-step instructions for the task to be
performed. Where necessary, a final test will be performed on the serviced or repaired item to be sure of minimum
performance. Personnel required are listed only if the task requires more than one.
b. Painting. Painting on the locomotive shall be done in accordance with TM 43-0139, Painting Instructions for
Field Use.
c. Welding. Welding on the locomotive shall be done in accordance with TM 9-237, Welding Theory and
Application.
4-20
