I have a 94 del sol vtec. There are four wires coming off the o2 sensors. 2 black 1 white and 1 light green. My question is which one is the heater power, heater ground, sensor ground and sensor element? The wire i'm most interested is the sensor element wire, which actually sends a voltage to the ECU. thanks

 

2 blk - heater (one to ECU(A6), other to ignition)
wht - O2 signal to ECU (D14)
Grn - O2 ground to ECU(D22)

 

thanks for your help!