https://www.cherokeeforum.com/f2/199...223114/index2/

this might help

 

Well, from the looks of those pictures, he has the same blue wire in the same position as mine. I know i’m 96 they changed the cruise buttons to resistance based, not switch based. I need to find out if the wires that plug into the cruise switch are the same in 95 when it was switched based, or changed in 96 when they switched to resistance based.

 

I just need to find out what these wires go to




Ive looked at every wiring diagram I can find and I can’t find any that describes the actual connector at the switch.

 

 

I couldn’t read the words until I actually responded to this, but all it says is the color of the wires, no description of what they do.

 

Okay, lets rewind. Have you tested that you're getting the proper signals at the PC? Specifically, referring to the diagram I posted earlier:

0 or 12 volts on pin 49, changing with the on/off switch.
12 volts on pin 48 when you press coast/set
12 volts on pin 50 when you press resume.

If not, you either have the wiring wrong, or the wrong switch. The fact that holding the set/coast button makes it work also suggest this because holding the set button should make it coast, not hold speed.

 

From the FSM and the circuit diagram I posted earlier, just search section 8W for the connector name (C225) and you'll find the pinout.


Based on your picture, you appear to be trying to install a 1996 clockspring and/or cruise switch which is not going to work with the 1995 PCM.

 

That connector, C225, is the one that plugs into the back of the clockspring, which isn’t any help. The FSM never shows the actual connector at the switch panel, which is frustrating as hell.

But I do have the wrong clockspring. I have one for a 1996, and i’m trying to find a 1995 one and put it in and see if it fixes anything.

But on another note, the guys at the other shop had a Snap-On scantool that hooked up to my PCM, and I found this:




The PCM I have is from 2007, which means it’s been replaced.

The PCM is programmed for a 1994, no A/C. But I do have A/C and it works. So somethings not adding up here.

My build date is 03/1995, so it shouldn’t be a 1994 technically.

Anyway, I’m going to search for the right clockspring.

 

Yeah, I see the FSM shows C225 being down under the column. The switch diagnostic table in 8H makes no sense compared to the wiring schematic either. The switch schematic in the 1995 FSM is identical to the 94 FSM which also says it's on the turn signal stalk.

 

Yikes.

Well, I do know that the blue wire, pin number 2, is the power wire. But what confuses me is that in another manual that someone sent to me, it says that pin number 2 is the blue wire on ZJ’s, and that pin number 4 on XJ’s is the blue wire.

But I do know I have the incorrect clock-spring, so it’s safe to assume that’s an issue. They did change the buttons in 1996, and maybe the wiring was different since it’s a different part number.

The only lead I have on that 1995 clock-spring is a junkyard in Iowa, and it is a 1995 XJ but it’s unknown if it’s cruise control. They said they’ll call me back on Tuesday and tell me if it has cruise control, then i’ll have them pull it and verify the part number.

The only doubt I have is that I can’t find any wiring diagrams anywhere that detail what the actual connector at the switch is. Not Alldata, Identifix, not the FSM or any other manual that has wiring diagrams for my Jeep.

Another thing that confuses me is that even though I have the wrong clock-spring, after I tested everything going to the PCM, is that all the pins tested as they should. I even looked at what it was doing with that scantool I was talking about, and it switches between set, resume, on, and stop. So I don’t know why the clockspring would matter if it’s all going to the right pins. But who knows. If I can find one, i’ll put it in. I’m bound to at least figure out something.

 

Could it be that since my PCM is saying it’s a 1994 PCM, where the cruise control was on the turn signal stalk, that having the buttons on the bottom of the steering wheel is confusing it?

I did some digging and it looks like in 1994 the cruise control was on the turn signal stalk, then in 1995 it was on the bottom of the steering wheel with a toggle switch for the “on/off”, and then in 1996 they changed the layout to all momentary switches, then in mid 1996-1997 they changed to the horn buttons.

So in theory, if I can find the 1995 clockspring and it still doesn’t work, I can find a 1995 PCM and everything should work, right?

 

Sorry but I'm not following here. Are you saying the PCM was replaced in 2007 with one from an '94?

 

Im saying that yes it was replaced in 2007, but someone got a PCM in 2007 that was programmed for a 94

 

So looking at both a 1994 FSM and a 1995 FSM, the inputs are the same for each year. Each input is exactly the same, so having a 1994 PCM in my 1995 isn’t going to make any difference.

I’m still looking for a 1995 clock spring with cruise control, and I’ll put that in and see if there is any change. There should be, because why would the clock springs be different part numbers when each switch set is different?

 

I'm going to assume the 96 clockspring has one less wire, since the feedback is resistance based instead of individual line for each button?

You've already messed with adding an external switch. Why go one step further and jumper the pins at the connector at the base of the column to enable speed control and add a button to simulate hitting set? If you directly control what the ECM sees, then you can prove or disprove that as the problem.