Zenobian_84 Posted April 22, 2014 Share Posted April 22, 2014 Had a bit of a rough time this past weekend. Old wiring nearly caught the truck on fire, but that's another story for another time. While replacing said old wiring, I noticed the engine harness pigtail for the O2 sensor started to smoke, and sure enough, the lead power wire going into it sizzled against some intake ports, so I made a jumper connection to make it work. Can I snag a connector out of the junkyard for a 4.0 and wire it into the 2.5 O2 sensor, or are they completely different styles? Don't dabble too much with the 4.0 stuff, but I might start having too since 2.5's are virtually non-existant down here in FL. Link to comment Share on other sites More sharing options...
cruiser54 Posted April 23, 2014 Share Posted April 23, 2014 They appear to use the same connector in the wiring diagram. Link to comment Share on other sites More sharing options...
Guest Posted April 23, 2014 Share Posted April 23, 2014 Much appreciated, Cruiser. :cheers: Link to comment Share on other sites More sharing options...
Guest Posted April 26, 2014 Share Posted April 26, 2014 Just as an FYI in case anyone else runs into this problem: Only a 4.0 RENIX pigtail will be plug and play on a 2.5 equipped RENIX (?) MJ, as the HO variant is a 4 wire connector, as is the exhaust O2 sensor pigtail. This remains unconfirmed on the MPFI 2.5 models Gotta look out for other 2.5 guys out there. Of course, I'm sure one could make the HO plug work, but I didn't bother grabbing any to test which wire goes to what, etc. Link to comment Share on other sites More sharing options...
benjy_26 Posted April 26, 2014 Share Posted April 26, 2014 I can look at my 94 ZJ later this weekend and suss out the O2 wiring, if you still need to know. Link to comment Share on other sites More sharing options...
cruiser54 Posted April 26, 2014 Share Posted April 26, 2014 I can look at my 94 ZJ later this weekend and suss out the O2 wiring, if you still need to know. Has 4 pin square connector.......Different animal. Link to comment Share on other sites More sharing options...
Rockfrog Posted April 26, 2014 Share Posted April 26, 2014 FYI ... the 3 pin renix connector is just a 3 pin GM weather pack connector ... parts to repair, replace/rewire the connector are available just about everywhere. Link to comment Share on other sites More sharing options...
benjy_26 Posted April 27, 2014 Share Posted April 27, 2014 I can look at my 94 ZJ later this weekend and suss out the O2 wiring, if you still need to know. Has 4 pin square connector.......Different animal. Indeed, but if one can figure out said 4 wires and their functions, some creative wiring may get the connector to work, which would be cool for us 2.5 guys, because, well, finding 2.5 Renix stuff is a PITA! Link to comment Share on other sites More sharing options...
cruiser54 Posted April 27, 2014 Share Posted April 27, 2014 I can look at my 94 ZJ later this weekend and suss out the O2 wiring, if you still need to know.Has 4 pin square connector.......Different animal. Indeed, but if one can figure out said 4 wires and their functions, some creative wiring may get the connector to work, which would be cool for us 2.5 guys, because, well, finding 2.5 Renix stuff is a PITA! See post 7. That connector is as common as belly buttons. Link to comment Share on other sites More sharing options...
Rockfrog Posted April 28, 2014 Share Posted April 28, 2014 And the 3 wire and 4 wire sensors work slightly different. Any 3 wire O2 sensor will have the same plug ... it's common enough, not renix specific. The 4 wire just adds a pre heater circuit ... Link to comment Share on other sites More sharing options...
cruiser54 Posted April 28, 2014 Share Posted April 28, 2014 Renix is very different and has a heater already. Kind of an odd duck. Link to comment Share on other sites More sharing options...
Rockfrog Posted April 29, 2014 Share Posted April 29, 2014 Learn something new every day ... although I had no issues finding one up here for my 88. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now