During cranking, what should be checked for the starter circuit relay?

The starter circuit relay is a critical component that helps deliver current to the starter motor when starting an engine. When examining the starter circuit relay during cranking, checking for high resistance in the Power and Battery Supply (PBS) circuit is essential.

Resistance in this circuit can lead to inadequate voltage reaching the starter motor, which may prevent it from operating efficiently or starting the engine at all. High resistance can be caused by corroded connections, damaged wiring, or faulty components, which can impede the flow of electricity. By checking for high resistance, a technician can determine if there’s an issue that would affect the performance of the starter circuit relay, ensuring that sufficient power is available to crank the engine effectively. This diagnostic step is pivotal in troubleshooting starting issues in vehicles.