on the sensor, black and black are the heater power and ground
i would think they would go to the black w/ red stripe and red w/ black stripe on the car loom.
you can check cos one of them should be ground, and one should be +12V with power to IGN.
i think black on loom is for the sensor signal, and brown is ground.
i can7t find the excellent table with all different colours atm but i have linked it before.
here is vague bosch table.
http://www.boschautoparts.com/NR/rdo...sorInstall.pdf
which car?
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