Operation CHARM: Car repair manuals for everyone.

Power Relay Test




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

NOTE: See Turn Signal/Hazard Relay input test.




Type 1:




Type 2:




Normally-open type A:
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.4 terminals.
- There should be no continuity between the No.1 and No.2 terminals when power is disconnected.




Rear Window Defogger Relay:




ABS Pump Motor Relay:




Blower Motor Relay, Type 1:




Blower Motor Relay, Type 2:




Normally-open type B:
Check for continuity between the terminals.
- There should be continuity between the No.1 and No.3 terminals when power and ground are connected to the No.2 and No.4 terminals.
- There should be no continuity between the No.1 and No.3 terminals when power is disconnected.




Windshield Wiper Intermittent Relay:




Five-terminal type A:
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.2 and No.4 terminals when power is disconnected.




Moonroof Open And Close Relays:




Five-terminal type B:
Check for continuity between the terminals.
- There should be continuity between the No.1 and No.2 terminals when power and ground are connected t9 the No.3 and No.5 terminals.
- There should be continuity between the No.1 and No.4 terminals when power is disconnected.