I'm trying to figure out which color wires go to the o2 sensors. I have a 95 b-body lt1. I was trying to figure out if I have OBDI or II. I cannot find the wires for the o2 sensors, I was hoping I could trace them from the computer and track them down. Do the O2 sensors from 95 have 3 wires? if so I may have found em.

I don't see the square connectors that the OBDII has for the sensors, so I'm thinking it's OBDI... I hope!


Also if it is OBDI, should I be able to wire it into the hardshell under the dash for the OBDI setup on my 91 RS , this way I'm hoping I can still pull codes if I need to!!

Thanks for any help!! Matt

 

if the hardshell is the same as the camaro then it is OBD1

 

Im not sure what you are asking, I got lost in the second sentence.
The wires for the O2:
Left side
On O2 sensor On computer
A Tan/Wht C19 Low signal
B PPL/Wht C20 High
C BLK Ground
D BRN POWER
Right Side
A Tan C7 Low
B PPL C8 High
C BLK Ground
D BRN POWER
The BLK and BRN are for the heating element. I know in the F-Cars after 93 they were all heated O2's. Im not sure about the other cars.

 

Thanks SWINGRRR:

That's exactly what I was looking for!!

Second of all, I didn't take the OBDI hardshell from the caprice (Donor car). If I wire this all in correctly to my 91 RS , should I be able to pull codes using the OBDI hardshell that's in my car (the 91)? My fear is if the engine light comes on and the car seems to run normal, I'll never be able to pull codes to see what's wrong with it.

thanks, Matt

 

You are gonna have to help me with "hardshell." I dont know what that is, and a search revealed nothing.

 

I mean the plastic thing that you would plug a scanner into to pull codes if necessary, if the check engine light were on. It's located under the dash. I would assume they use it when you dynotune your car, but I don't know for sure.

 

I would imagine, if you wired it correctly, it will still work. Might try a similar question in the 3rd gen section. Im not to savy on 3rd gens. I can give you any diagrams you need though. Well I say "any", mainly I have 93 stuff, and some 95.