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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.
 
 
  
Rear window defogger relay 
  
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Blower motor relay
 type 1: 
  
type 2: 
  
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