Wiring a 4 wire o2 sensor.

[GoBucs]

Just put some headers on my truck and decided to run a 4 wire o2 i had laying around. How do i go about wiring this thing? All the info i've seen is for 3 wires.

Thanks,
Nick

 

[Joe383]

Fuel injected or for a gage?

 

[bucket]

Depends on the sensor brand. The signal wire is normally blue or purple it seems, and that would go to your original wire. The sensor then has a dedicated ground wire (color also varies). The pair of same-colored wires are for the heater, 1 will go to power and one will go to ground.