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Power Relay Test

Use this chart to identify the type of relay, then do the test listed for it.
Relay
Test
A/C compressor clutch relay
Normally-open type
A/C condenser fan relay
A/F sensor relay
Blower motor relay
ETCS control relay
Horn relay
Ignition coil relay
Lighting relay 1
Lighting relay 2
PGM-FI main relay 1 (FI MAIN)
PGM-FI main relay 2 (FUEL PUMP)
Power window relay (P/W)
Radiator fan relay
Rear window defogger relay
Starter cut relay (Starter relay 1)
Starter cut relay (Starter relay 2)
Front fog light relay
Rear fog light relay
Driver's seat heater relay (high)
Front passenger's seat heater relay (high)
Driver's seat heater relay (low)
Five-terminal type
Front passenger's seat heater relay (low)
Front super locking relay
Rear super locking relay
Daytime running lights relay
Driver's door unlock relay

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

Five-terminal type
Check for continuity between the terminals:
  • There should be continuity between the No. 1 and No. 2 terminals when battery positive terminal is connected to the No. 5 terminal, and battery negative terminal is connected to the No. 3 terminal.
  • There should be continuity between the No. 1 and No. 4 terminals when power is disconnected.