Auxiliary Water Pump 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 power and ground are connected to the No. 3 and No. 5 terminals.
- There should be continuity between the No. 1 and No. 4 terminals when power is disconnected.