Circuit Diagnosis - Cranking Circuit

Check the fuse in the underhood fuse-relay center. Inspect the circuit for opens, loose terminals inside connectors, corrosion, and damage. Verify that no wires are pierced by screws and no harnesses are missing insulation and rubbing on components. Inspect all connections to the starter motor, solenoid, ignition switch, and battery, including all ground connections. Clean and tighten all connections as required.