Normally open type (except PGM-FI relay 1, ignition coil relay, additional PGM-FI relay, ETCS relay, rear window defroster relay, air conditioner blower relay and electric motor relay)
Check the connection between the terminals.
There should be a connection between terminals #1 and #2 if power and ground are connected to terminals #3 and #4, respectively.
There should be no connection between terminals #1 and #2 if the power is disconnected.
1. Disconnect the D (20P) connector from the relay/fuse box located in the engine compartment.
2. From the engine compartment fuse/relay box side, perform the following check.
Main Relay 1 PGM-FI
Connect terminal #16 to the body ground. There should be voltage between terminal #5 and the body ground.
Disconnect terminal #16 from the body ground. There should be no voltage between terminal #5 and the body ground.
Ignition Coil Relay:
Connect terminal #16 to the body ground. There should be voltage between terminal #18 and the body ground.
Disconnect terminal #16 from the body ground. There should be no voltage between terminal #18 and the body ground.
Additional PGM-FI relay:
Connect terminal #20 to the body ground. There should be voltage between terminal #9 and the body ground.
Disconnect terminal #20 from the body ground. There should be no voltage between terminal #9 and the body ground.
ETCS relay:
Connect voltage and ground between terminals #15 and #17. There should be voltage between terminal #6 and the body ground.
Disconnect the voltage and ground between terminals #15 and #17. There should be no voltage between terminal #6 and the body ground.
Rear Window Defogger Relay:
Connect voltage and ground between terminals #4 and #14. There should be voltage between terminal #3 and the body ground.
Disconnect voltage and ground between terminals #4 and #14. There should be no voltage between terminal #3 and body ground.
Radiator Fan Relay, Condenser Fan Relay, Heater Motor Relay
1. Disconnect connector E (20P) from the relay and fuse box located in the engine compartment.
2. From the engine compartment fuse/relay box side, perform the following check.
Radiator Fan Relay
Connect voltage and ground between terminals #5 and #8. There should be voltage between terminal #13 and the body ground.
Disconnect voltage and ground between terminals #5 and #8. There should be no voltage between terminal #13 and body ground.
Condenser Fan Relay:
Connect voltage and ground between terminals #4 and #16. There should be voltage between terminal #12 and body ground.
Disconnect voltage and ground between terminals #4 and #16. There should be no voltage between terminal #12 and body ground.
Heater Motor Relay:
Connect voltage and ground between terminals #1 and #8. There should be voltage between terminal #3 and the body ground.
Disconnect voltage and ground between terminals #1 and #8. There should be no voltage between terminal #3 and body ground.
5-terminal type
Check the connection between the terminals.
There should be a connection between terminals #1 and #2 if power and ground are connected to terminals #3 and #5, respectively.
The connection should be between terminals #1 and #4 when the power is disconnected.
(The text was taken from the website: HondaBook)