3.
There should be no continuity between the No.1 and No.4 terminals when power is disconnected.
Remove the rear window defogger relay(A) from the passenger compartment junction block(B).
There should be continuity between the No.1 and No.4 terminals when power and ground are connected to the No.3 and No.2 terminals.
There should be no continuity between the No.1 and No.4 terminals when power is disconnected.
