Black is universally ground. The grey is prolly your 12 volts for the heater and the whites are prolly sensory. A haynes or a chiltons would tell you... always a good idea to have one around... Mines out in my car otherwise I'd look it up for you...
Black is universally ground. The grey is prolly your 12 volts for the heater and the whites are prolly sensory. A haynes or a chiltons would tell you... always a good idea to have one around... Mines out in my car otherwise I'd look it up for you...
I have a simple diagram here. I don't know what colors are which, but when you disconnect the connector, put the locking tab pointing to the left. With this orientation, the top left wire is the ground for the ignition wire (heater), the bottom left is the ignition source for the heater (+12V), the top right is the signal that the O2 sensor is sending to the ccrm, and the bottom right is the signal return or the ground for the signal.
With a multimeter, you should be able to figure which is which.
Scott