TRAILER ELECTRICAL SYSTEM DOES NOT WORK.

TM 9-2320-279-20-1

Troubleshooting Malfunctions (Cont)

Table 2-9.

Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

17. TRAILER ELECTRICAL SYSTEM DOES NOT WORK.

Step 1.

Check for damaged connector.

Replace damaged connector.

Step 2.

Disconnect batteries (para 7-91). Check chassis wiring harness for continuity. Refer to

FO-1, Electric Diagram.

Repair broken wires and connections.

If harness is defective, notify supervisor.

18. TURN SIGNALS DO NOT OPERATE.

NOTE

If composite lights on vehicle are LED type, perform step (1.1).

Step 1.

Check for burned out or damaged light bulbs.

Replace damaged or burned out light bulbs (para 7-60).

Step 1.1. Check for damaged or defective LED composite lights.

Replace LED composite lights (para 7-62).

Step 2.

Check turn signal wiring circuit for continuity. Refer to FO-1, Electric Diagram.

If continuity is not found in all wires, repair broken wires or connectors.

Step 3.

Remove heater compartment cover, check for continuity across circuit breaker No. 1

terminals.

If no continuity is found, replace circuit breaker No. 1 (para 7-43).

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