Oxygen Sensor & Cold Running Relays
Oxygen sensor relay is No. 2 relay on top of relay board. Cold running relay is No. 1 relay on top of relay board. See Fig 1 . Check circuit between terminals 85 and 86 with ohmmeter for continuity. Ohmmeter should read 0 ohms for good circuit.
Check for voltage at terminal 30 with voltmeter. If terminal 30 has voltage, terminal 87 should have equal voltage with ignition ON. When ignition is turned OFF, terminal 87 should have no voltage reading.