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Home >> Mazda >> 2007 >> B3000 Base, Automatic >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Troubleshooting (Power Systems) >> Pinpoint Test 3: DTC B1555 - Ignition Run Circuit Failure Or No Power In Run >> Pinpoint Test 4: No Power In Start >> Normal Operation
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Normal Operation

The ignition switch START circuit provides fused battery voltage along circuits (L/W) and (W/O) to the smart junction box (SJB) when the key is in the START position.