o2 sensor wiring (help with wiring up a universal one ?)

[offziide93]

Hey, i'm changing my o2 sensor and what i'm confused with is what wire is what on the standard o2 sensor. There are two black and two grey wires and the new one has one black, one grey and two whites. It is off a 4age 20v silvertop if it helps.

Pictures of standard:



Pictures of new one and wiring diagram of it:


Bosch universal lambda sensor column


Anyone know what i should wire to what ?

[PsyCo]

Can't see the 4th wire colour of your original sensor.
I'm guessing the 2 greys on the orginal are heater so should be connected to white on new sensor.
And as long as the 4th wire we can't see on your sensor isn't black, then the black one should be sensor + and go to black on the new sensor.

[offziide93]

yeah that's the confusing thing. There are two blacks and two greys on the original sensor.

[CrUZida]

Measure the resistance of the two blacks, and then the two greys.
Which ever is continuous with low ohms (5-20ohms) will be the heater.
One will be continuous to the body of the sensor, one will appear to do nothing.

[beerhead]

Black is the screened (has ground shielding) oxy sensor signal wire on the loom side, plug that to the Black wire on the sensor, the Grey wire on the sensor is connected to red/black on the loom side.

Plug the 2 heater wires in any polarity to the remaining 2 wires and you're done.