Operation CHARM: Car repair manuals for everyone.
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Ignition Relay: Testing and Inspection

Power Relay Test




Use this chart to identify the type of relay, then do the test listed for it.

Normally-open type




Check for continuity between the terminals.

- There should be continuity between the No. 1 and No. 2 terminals when battery positive terminal is connected to the No. 4 terminal, and battery negative terminal is connected to the No. 3 terminal.
- There should be no continuity between the No. 1 and No. 2 terminals when power is disconnected.