alia176 Posted April 30, 2004 Share Posted April 30, 2004 Hey guys, Sorry if this topic has been beaten to death but I wasn't able to find any specific info on wire color codes. I bought a universal Bosch O2 sensor from Autozone and it came with two white and one black wire. My oem O2 sensor has the same exact wires. Ok, that's a no brainer you say. Unfortunately, I'm unsure as to how to splice in the white wires from my new unit to the white wires of the old unit. I am assuming that +signal and +heater wires are interchangeable? I am also assuming that the black wire from my new unit goes to the black wire (ground) of the oem sensor? BTW, the wire color change on the engine side of the O2 sensor connector plug. The instruction that came with the Bosch left me a little confused. In order to use the table they provide, you need to know whether your oem unit is a Bosche, A, B, or C type sensor. What are types A, B, C type O2 sensor and how the heck would I know that? Anyway, any insight into this matter would be very helpful. thanks. Ali '95 Wagon Quote Link to comment Share on other sites More sharing options...
99obw Posted April 30, 2004 Share Posted April 30, 2004 Don't swap the heater and signal wires!!! The two white wires should be the heater wires. Hook those up to the heater wires on your connector, I don't think the polarity matters. Hook the black signal wire on the new sensor to the black signal wire on the connector. I like to solder them together using the little splice connectors that are provided and then slide the shrink tubing down and heat it carefully with a lighter. Be sure to tin the wires, let them cool, then slide the shrink tubing over the wires before you assemble it. Quote Link to comment Share on other sites More sharing options...
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