fhorta

I've now discovered fuse blows when I put it in reverse too. I guess I wasn't leaving it in reverse long enough before, but today I left it in reverse for about 5 secs, put it in park, checked fuse and blown.

I have disconnected speedometer, odometer, ac relay, ac compressor, cooling fan, aux fan relay...all same result, still blowing. Last thing to check of functions on this fuse is the gear selector i think, other than the ignition switch. But what is it exactly the gear selector? Is there like a plug or sensor or something on gear selector, some kind of switch? The fuse # with issue as I believe i have gathered is number 11. When I first disconnected the speedometer and odometer, the fuse did last about half mile before blowing. I even stepped on gas on took it to about 2k rpms. Thought I found problem, but now back at square one. Ideas, suggestions,....where is this gear selector plug, sensor, or whatever it is that I'm looking for. Thanks

awg

if you state the relevant page numbers in the manual, I can look them up, and see the circuit diagram and fuse number etc

I think you did this before on one post,

fhorta

Hello ,thanks. I believe it's page number 1399 of the 93 cherokee manual. Mine is a 91 but it's closest I could find. Attached is an image and I think confirms 93 and 91 pretty much same. From 84 to 96 and this diagram og relays and fuses pretty much resembles mine. I also see that REVERSE LAMPS also part of this fuse. That's another one I haven't trouble shoot yet. I think now I'm going to connect items back and see if any change, like maybe it won't blow fuse in reverse or something. Just don't know what else to do.

Fuse #11
this not image of page 1399, but a separate image from YouTube channel.

fhorta

Another pg number is 1251 this one addresses transmission and gear selector switch reverse, drive, etc.. this one refers to fuse 6, 15A. So, maybe it's not #11, or maybe varies by if different years.

fhorta

Don't know if to be encouraged or just give up:
I connected all relays and plugs back.

I disconnected the neutral safety switch/transmission range switch plug. Now with brake applied, in reverse, drive, fuse is fine. Took for a drive regular speed, 35 to 40 mph for two miles and still fuse is fine.

And with all this, I had not realized reverse light, brake lights, park lights, turn signals are not working. Don't know if something related or separate. More to come..

fhorta

Ok, 25 miles after, including about 10 miles with ac on and fuse still fine. I want to say problem found, but not quite yet.

I am not 100% sure that the plug I disconnected is what I called it. See pics. Also, as I traced that wire, it splits right about where that white plug is. Both wires then proceed to go back towards the rear of tranny and get lost back there. Is there a sensor back there somewhere where these wires plug into? So, assuming this indeed is my problem, what is the solution? Replace whole wire from the plug going back, or is therr a sensor or something to replace?

They split into two; that white plug and the bottom black covered one. They head towards back of tranny. Next puc is probly better.

That black covered Wire coming down after traveling from pass side and over to drivers side. Right before that white plug, it splits into two. They both continue to the back of tranny

This the plug i disconnected. Bottom part of plug goes down and snakes up over the tranny from pass side to driver's side.

The two wires continue towards the rear of tranny. Can't quite see where they end. Do i have to remove some stuff there?

awg

You are on the home straight!

Using your manual, there will be a chapter called "plugs, grounds, splices etc)

This has pictures and locations of plugs and harnesses

Just a guess, but you may have a chafed wire in harness to the NSS (Nuetral Safety Switch)

I am confused though, as unplugging it should mean no start

Once you have positively identified the harness that is causing the issue, we can advise next step of action

The two plugs to the trans in the engine bay go to various things in the trans, one is the solenoids, one the NSS switch, I think there may also be a speed sensor

Once again, the manual will tell you all this. See if you can find an "Index" for your manual, I didnt notice it, but makes life so much easier

fhorta

Ok. Hold on everybody: reconnected mentioned plug and was expecting fuse to blow. One week later, ac on ,reverse, drive, all normal driving conditions and fuse still good.

UKXJ

Hmmmm!

awg

in theory, a crusty connection can cause a high resistance, which draws too much current, especially on high power stuff like A/C causing a fuse to blow ( I spray a little WD40)

On the other hand, maybe you twisted the chafed harness just enough

I am presently serving time on an odd fault repair before I declare "its fixed"

I like my XJ most when it behaves

fhorta

One theory I have is that it may be my reverse, park, brake lights, turn signals. I mentioned in earlier posts that at some point those lights stopped working and not exactly sure when, but before I started working on this problem those functions were working.
Now, something happened (i have not looked into it yet) that those lights stopped working. Coincidentally, i think, the fuse has not blown (?). Maybe the problem was with those lights/functions which caused the fuse to blow. Hence, if those functions were to be fixed, fuse may blow again. Maybe some kind of short with reverse, turn signal, brake light wiring. Just a theory for now.

UKXJ

So, are you saying you have no lights at all, at least at the back? Seems to me the problem's a lobg way from fixed.

awg

the wiring harness that supplies the rear, on one of my XJ, where it went around a corner at the back somewhere, all the wire insulation was split

fhorta

I'm saying, now, EVERYTHING now is working except; reverse lights. Ac, turn signals, brakes, speedometer, ...only thing now not working is reverse lights.

What I have done: tried removing fuse box..,wiggled, turned, pulled, etc. With intention to see if I could see some kind of loose wire, rust, something. But I didn't get that far. Was pretty hard to get that casing off, so I left it alone. ALL the while, everything is working now. Only thing is reverse light. Not working. And, it is the one light part of that 15A circuit that is not working. So, I think that if that reverse light were to get fixed, that fuse may blow again; pinpointing root of the problem. ...?

UKXJ

OK, thanks for clarifying that.

Not likely to be both bulbs but worth checking, but prime suspect is NSS - might just need adjusting. Last time mine failed I got under it just to check - & found the nut was only finger tight; nipped it up & reverse lights have been fine ever since.