need help on o2 wire colors
need help on o2 wire colors i cut my 02 wires to extend them for my LT's. Theres a black, gray and 2 whites. Are the 2 white wires specific ones or just neutral grounds? I marked what one was what but then stripeed off the mark 
Its a obd1 car with 4 wires in a row. Black, gray, white, white.
Its a obd1 car with 4 wires in a row. Black, gray, white, white. 
Staging Lane
Joined: Jan 2004
Posts: 84
Likes: 0
From: Calgary, Alberta, Canada
Notes from fitting a 4-wire to a one wire pre-OBD2 project:
The black wire (oxygen sensor signal lead) is spliced into the input to the PCM
The grey wire (oxygen sensor signal ground) is connected to ground
One white wire (either one) is the heater +12 volts lead
The other white wire is the heater ground lead
HTH
The black wire (oxygen sensor signal lead) is spliced into the input to the PCM
The grey wire (oxygen sensor signal ground) is connected to ground
One white wire (either one) is the heater +12 volts lead
The other white wire is the heater ground lead
HTH
