help with wiring heated o2 sensor
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
The two white are the heater, one goes to ground, the other can go to say your fuel pump lead....gets hot when engine running and at no other time....
the black has usually been the output to the computer from the sensor itself....
that gray I"m not first hand familiar with, but I hear they running separate sense wire ground ref into the computers these days....so that's about what it has to be....
the black has usually been the output to the computer from the sensor itself....
that gray I"m not first hand familiar with, but I hear they running separate sense wire ground ref into the computers these days....so that's about what it has to be....
Thread Starter
Intermediate
Joined: Jun 2005
Posts: 45
Likes: 0
From: Phoenix AZ
thanks for the help Mr vette
So
-white wires, one to ground and one to fuel pump lead or similar
-gray is a ground (as per instructions)
and the black wire connects to one of the two wires from the original O2 harness......which one?
Thanks again, almost there
So
-white wires, one to ground and one to fuel pump lead or similar
-gray is a ground (as per instructions)
and the black wire connects to one of the two wires from the original O2 harness......which one?
Thanks again, almost there
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
never seen just a TWO wire O2 harness....run the engine and see if one of them has 12 volts on it....if so, their O2 sensor had the heater element grounded at the sensor, but that is bad practice.....it could lead to a false signal from the sensor to the computer, IF the ground from the sensor into the pipe got some corrosion on it....hard to imagine the pipes developing a bad connection to the engine what with 8 bolts...
Thread Starter
Intermediate
Joined: Jun 2005
Posts: 45
Likes: 0
From: Phoenix AZ
I am posting a photo of my O2 harness. The left side (two red wires are from the main harness. The right side (black and white) are coming from the old sensor.
My new O2 sensor is a Bosch heated 4 wire. It has a black (signal wire), 2 white wires (heater wires) and 1 gray wire (ground).
I have
-one of the white wires and the gray wire grounded to the engine block
-the second white wire I assume has to go to a switch power source to power the heater when car is on
-the black signal wire i am guessing connects to one of the original wires, which one? and what happens to the second?
Thanks for the help.......I hate wiring!!!
My new O2 sensor is a Bosch heated 4 wire. It has a black (signal wire), 2 white wires (heater wires) and 1 gray wire (ground).
I have
-one of the white wires and the gray wire grounded to the engine block
-the second white wire I assume has to go to a switch power source to power the heater when car is on
-the black signal wire i am guessing connects to one of the original wires, which one? and what happens to the second?
Thanks for the help.......I hate wiring!!!
