I just purchased a 95 Wrangler with the 2.5L 4 Cyl. engine. I get a code
21, which is related to the 02 sensor. The guy I got the jeep from just
replaced the 02 sensor. The connector was bad, so he cut it out and
spliced the wires together and got mixed up. He said ever since then the
light comes on. The engine runs fine, but does not idle well when it heats
up, I am hoping this is related to the sensor, but it may not be. I just
want to get the light out.

Can anyone tell me how to wire this thing? There are the following wires
coming from the wiring harness:

Black
Black with Blue Stripe
Black with Green Stripe
Green with Orange Stripe

and coming from the sensor:
White
White
Black
Gray

This is how it is currently (runs this way):
Black - White
Black/Blue - White
Blk/Green - Gray
Green/Orange - Blk

I've played with as many combinations that I can and either the engine will
not crank, or I get the same check engine light code. I can go purchase
another o2 sensor in case this one is fried, but wanted to try to get it
wired right first.

Any help would be greatly appreciated!!

Jay

 

JMH did pass the time by typing:

> I've played with as many combinations that I can and either the engine will
> not crank, or I get the same check engine light code. I can go purchase
> another o2 sensor in case this one is fried, but wanted to try to get it
> wired right first.

It's too late for this advice. Hopefully you haven't destroyed the ECU, but wiring the O2 sensor the wrong way can damage it and
the ECU. When it comes to wiring, don't guess.

Unless someone here posts the pinout, your going to have to contact the dealership and get a copy of the wiring diagram. My 93
service books don't have those colors.

My suggestion is buy the service book. It will pay for itself in the first couple of repairs.

--
DougW

 

JMH did pass the time by typing:

> I've played with as many combinations that I can and either the engine will
> not crank, or I get the same check engine light code. I can go purchase
> another o2 sensor in case this one is fried, but wanted to try to get it
> wired right first.

It's too late for this advice. Hopefully you haven't destroyed the ECU, but wiring the O2 sensor the wrong way can damage it and
the ECU. When it comes to wiring, don't guess.

Unless someone here posts the pinout, your going to have to contact the dealership and get a copy of the wiring diagram. My 93
service books don't have those colors.

My suggestion is buy the service book. It will pay for itself in the first couple of repairs.

--
DougW

 

JMH did pass the time by typing:

> I've played with as many combinations that I can and either the engine will
> not crank, or I get the same check engine light code. I can go purchase
> another o2 sensor in case this one is fried, but wanted to try to get it
> wired right first.

It's too late for this advice. Hopefully you haven't destroyed the ECU, but wiring the O2 sensor the wrong way can damage it and
the ECU. When it comes to wiring, don't guess.

Unless someone here posts the pinout, your going to have to contact the dealership and get a copy of the wiring diagram. My 93
service books don't have those colors.

My suggestion is buy the service book. It will pay for itself in the first couple of repairs.

--
DougW

 

"DougW" <post.replies@invalid.address> wrote in
news:x5NUd.14234$Ps.8938@okepread06:

I figured it would do no harm at this point since the guy I got it from had
already tried all combinations :-). I'll probably purchase another one as
soon as I am sure the wiring is right. I'll look into a service book too.

Thanks!
Jay


> JMH did pass the time by typing:
>
>> I've played with as many combinations that I can and either the
>> engine will not crank, or I get the same check engine light code. I
>> can go purchase another o2 sensor in case this one is fried, but
>> wanted to try to get it wired right first.
>
> It's too late for this advice. Hopefully you haven't destroyed the
> ECU, but wiring the O2 sensor the wrong way can damage it and the ECU.
> When it comes to wiring, don't guess.
>
> Unless someone here posts the pinout, your going to have to contact
> the dealership and get a copy of the wiring diagram. My 93 service
> books don't have those colors.
>
> My suggestion is buy the service book. It will pay for itself in the
> first couple of repairs.
>

 

"DougW" <post.replies@invalid.address> wrote in
news:x5NUd.14234$Ps.8938@okepread06:

I figured it would do no harm at this point since the guy I got it from had
already tried all combinations :-). I'll probably purchase another one as
soon as I am sure the wiring is right. I'll look into a service book too.

Thanks!
Jay


> JMH did pass the time by typing:
>
>> I've played with as many combinations that I can and either the
>> engine will not crank, or I get the same check engine light code. I
>> can go purchase another o2 sensor in case this one is fried, but
>> wanted to try to get it wired right first.
>
> It's too late for this advice. Hopefully you haven't destroyed the
> ECU, but wiring the O2 sensor the wrong way can damage it and the ECU.
> When it comes to wiring, don't guess.
>
> Unless someone here posts the pinout, your going to have to contact
> the dealership and get a copy of the wiring diagram. My 93 service
> books don't have those colors.
>
> My suggestion is buy the service book. It will pay for itself in the
> first couple of repairs.
>

 

"DougW" <post.replies@invalid.address> wrote in
news:x5NUd.14234$Ps.8938@okepread06:

I figured it would do no harm at this point since the guy I got it from had
already tried all combinations :-). I'll probably purchase another one as
soon as I am sure the wiring is right. I'll look into a service book too.

Thanks!
Jay


> JMH did pass the time by typing:
>
>> I've played with as many combinations that I can and either the
>> engine will not crank, or I get the same check engine light code. I
>> can go purchase another o2 sensor in case this one is fried, but
>> wanted to try to get it wired right first.
>
> It's too late for this advice. Hopefully you haven't destroyed the
> ECU, but wiring the O2 sensor the wrong way can damage it and the ECU.
> When it comes to wiring, don't guess.
>
> Unless someone here posts the pinout, your going to have to contact
> the dealership and get a copy of the wiring diagram. My 93 service
> books don't have those colors.
>
> My suggestion is buy the service book. It will pay for itself in the
> first couple of repairs.
>

 

Too bad the person tried to put the wrong one in. Anyone with even half
a clue should know better. If the plug doesn't fit, it's the wrong
thing.

You problem now is the wrong O2 colors won't ever be matched in any book
so unless you know how to read the thing and have the right tools to do
so, you are out of luck.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

JMH wrote:
>
> "DougW" <post.replies@invalid.address> wrote in
> news:x5NUd.14234$Ps.8938@okepread06:
>
> I figured it would do no harm at this point since the guy I got it from had
> already tried all combinations :-). I'll probably purchase another one as
> soon as I am sure the wiring is right. I'll look into a service book too.
>
> Thanks!
> Jay
>
> > JMH did pass the time by typing:
> >
> >> I've played with as many combinations that I can and either the
> >> engine will not crank, or I get the same check engine light code. I
> >> can go purchase another o2 sensor in case this one is fried, but
> >> wanted to try to get it wired right first.
> >
> > It's too late for this advice. Hopefully you haven't destroyed the
> > ECU, but wiring the O2 sensor the wrong way can damage it and the ECU.
> > When it comes to wiring, don't guess.
> >
> > Unless someone here posts the pinout, your going to have to contact
> > the dealership and get a copy of the wiring diagram. My 93 service
> > books don't have those colors.
> >
> > My suggestion is buy the service book. It will pay for itself in the
> > first couple of repairs.
> >

 

Too bad the person tried to put the wrong one in. Anyone with even half
a clue should know better. If the plug doesn't fit, it's the wrong
thing.

You problem now is the wrong O2 colors won't ever be matched in any book
so unless you know how to read the thing and have the right tools to do
so, you are out of luck.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

JMH wrote:
>
> "DougW" <post.replies@invalid.address> wrote in
> news:x5NUd.14234$Ps.8938@okepread06:
>
> I figured it would do no harm at this point since the guy I got it from had
> already tried all combinations :-). I'll probably purchase another one as
> soon as I am sure the wiring is right. I'll look into a service book too.
>
> Thanks!
> Jay
>
> > JMH did pass the time by typing:
> >
> >> I've played with as many combinations that I can and either the
> >> engine will not crank, or I get the same check engine light code. I
> >> can go purchase another o2 sensor in case this one is fried, but
> >> wanted to try to get it wired right first.
> >
> > It's too late for this advice. Hopefully you haven't destroyed the
> > ECU, but wiring the O2 sensor the wrong way can damage it and the ECU.
> > When it comes to wiring, don't guess.
> >
> > Unless someone here posts the pinout, your going to have to contact
> > the dealership and get a copy of the wiring diagram. My 93 service
> > books don't have those colors.
> >
> > My suggestion is buy the service book. It will pay for itself in the
> > first couple of repairs.
> >

 

Too bad the person tried to put the wrong one in. Anyone with even half
a clue should know better. If the plug doesn't fit, it's the wrong
thing.

You problem now is the wrong O2 colors won't ever be matched in any book
so unless you know how to read the thing and have the right tools to do
so, you are out of luck.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

JMH wrote:
>
> "DougW" <post.replies@invalid.address> wrote in
> news:x5NUd.14234$Ps.8938@okepread06:
>
> I figured it would do no harm at this point since the guy I got it from had
> already tried all combinations :-). I'll probably purchase another one as
> soon as I am sure the wiring is right. I'll look into a service book too.
>
> Thanks!
> Jay
>
> > JMH did pass the time by typing:
> >
> >> I've played with as many combinations that I can and either the
> >> engine will not crank, or I get the same check engine light code. I
> >> can go purchase another o2 sensor in case this one is fried, but
> >> wanted to try to get it wired right first.
> >
> > It's too late for this advice. Hopefully you haven't destroyed the
> > ECU, but wiring the O2 sensor the wrong way can damage it and the ECU.
> > When it comes to wiring, don't guess.
> >
> > Unless someone here posts the pinout, your going to have to contact
> > the dealership and get a copy of the wiring diagram. My 93 service
> > books don't have those colors.
> >
> > My suggestion is buy the service book. It will pay for itself in the
> > first couple of repairs.
> >