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SERIES 638 STARTING CIRCUIT CONNECTIONS LOOSE OR CORRODED

To determine if the starting circuit connections are loose or corroded and causing the engine to crank slowly or not crank, perform the following steps: ‪

  1. Visually check the circuit connections to ensure that they are clean and secure.
    1. If the circuit connections are neither clean nor secure, repair as necessary. Refer to section .
    2. If the circuit connections are clean and secure, check for proper starter operation. Refer to section .

Repair of Starting Circuit Connections

Repair the starting circuit connections as follows: ‪

  1. Clean the connections as necessary.
  2. Tighten all loose connections.
  3. Verify repairs.
Test of Engine with Repaired Starting Circuit Connections

Perform the following to determine if the repaired starting circuit connections resolved the fault: ‪

  1. Attempt to start and run the engine.
    1. If the engine failed to start and run, check for proper starter operation. Refer to section .
    2. If the engine started and ran, no further troubleshooting is required.