- #1 of 45
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87 jeep cherokee limited cruise control problem.
by rambopants
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Dec 09, 2006 (2:29 pm)
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My cruise control started acting weird awhile back, it would cut off when ever it wanted too and wouldn't even come on at all sometimes now it dosnt
work. It says in the haynes manual that it is controlled by vaccum but dosnt really help much it terms of where to inspect. So does anyone know where i should start looking?
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- #2 of 45
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Re: 87 jeep cherokee limited cruise control problem. [rambopants]
by quadmeister
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Dec 27, 2006 (8:07 am)
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Replying to: rambopants (Dec 09, 2006 2:29 pm)
I had an 89 Cherokee that did that and the problem turned out to be a wire chaffed through to the point that it was parted, but made contact every now and then, so some times it worked, sometimes it didn't until eventually it stopped working all together. The wire runs from inside the turn signal lever down through the steering column. The break/chafe was where it meets the steering column and makes a bend to run down inside the column. (it goes through a hole in the column with a sharp edge) The wire was too tight against the steel column and every time you use the turn signal it chaffed or cut a little bit each time. I managed to take the turn signal lever / cruise switch apart without destroying it and replaced the wire. I'm pretty sure I had to solder the new wire in place at the cruise switch but I can't remember if I just spliced into the old wire under the dash or replaced the whole thing (probably spliced). Gluing the turn signal lever / cruise control switch back together, while maintaining fully functioning switch movements after drying was a bit of a challenge I remember too. Good luck with that. 
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- #3 of 45
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'94 Cherokee cruise problem
by rhysohio
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Jan 02, 2007 (6:52 pm)
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Cruise control worked intermittently, then stopped all together. Wires through steering column hole still look intact, and system still hold vacuum well. Cable to throttle assembly still moves freely. Any guesses from there? Control on turn signal assembly, vs. servo in engine bay? Anything else that it could be? Could it still be the wires into the steering column, even though the wire casing looks intact?
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- #4 of 45
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Re: '94 Cherokee cruise problem [rhysohio]
by gabbered
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Mar 12, 2007 (11:09 am)
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Replying to: rhysohio (Jan 02, 2007 6:52 pm)
I have a '98 Cherokee with the same kind of intermittent cruise control problem. Did you ever figure out what was causing it?
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- #5 of 45
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2002 Grand Cherokee-- cruise control intermittent
by bheiar
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Aug 12, 2007 (6:50 pm)
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Our 2002 Grand Cherokee cruise control just started cutting out. Switches are on the steering wheel. You can set the switch the first time when initially starting, but if you make any adjustments, it shuts off. Then it won't activate again when touching the on/off switch. Come to a complete stop and turning off the ignition, and then restarting the vehicle again, will then allow you to activate the cruise switch again. But then when you try to adjust the speed or hit the brake to temporarily inactivate the cruise, it then shuts off and you can't activate it again, until you shut the vehicle off again.
Any ideas, before I take it to a dealer for service?
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- #6 of 45
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Re: '94 Cherokee cruise problem [gabbered]
by rhysohio
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Aug 15, 2007 (10:14 am)
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Replying to: gabbered (Mar 12, 2007 11:09 am)
Sorry for the LATE reply.
Still haven't gotten this solved. System keeps a vacuum with no problem, throttle cable not binding, etc.
Next step is to try and replace the switch on the steering column. Haven't gotten there yet. Too many other things floating around.
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- #7 of 45
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Re: '94 Cherokee cruise problem [rhysohio]
by mizer
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Sep 04, 2007 (9:42 am)
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Replying to: rhysohio (Aug 15, 2007 10:14 am)
Hi guys. I too had this same problem on my 95 Cherokee Country a couple of times. The first time my Cruise control would work but didn’t quite keep up my speed I set it at. What I found was that the vacuum line that goes to the reservoir behind the front bumper had a small hole in it from chaffing right above the vacuum reservoir. I currently had a problem where it would work intermittently then soon after not at all. At the same time my Air Conditioning went out too. My AC would not work on any of the regular setting and the fan wouldn’t even blow but it would blow cold air through my Defroster with the lever in the Cold position. After double checking the vacuum line in the engine compartment I found no Vacuum leaks. The recirculation part under the dash below the glove box side was working correctly and I could here the vacuum pressure bleeding off when I would slide the temperature slider. To fix my problems this is what was changed. The AC it was the climate control module thing. The whole assembly. That fixed the AC. For the Cruise Control it turned out to be the Brake Switch. In all I spent $502.00 dollars for $131.00 in parts on a job I could have done myself if I would have known. So hopefully this will help someone else out. Good luck.
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- #8 of 45
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Re: '94 Cherokee cruise problem [mizer]
by goldstein_j
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Oct 01, 2007 (1:53 pm)
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Replying to: mizer (Sep 04, 2007 9:42 am)
When you say you had to change the Climate Control Module Thing, do you mean the actual unit that you turn the knobs on? Or some internal piece? Also with the brake switch, how did you change that? My 2004 Jeep Grand Cherokee is doing both the same things as you mentioned.
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- #9 of 45
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Re: '94 Cherokee cruise problem [goldstein_j]
by mizer
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Oct 01, 2007 (2:32 pm)
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Replying to: goldstein_j (Oct 01, 2007 1:53 pm)
Yes, the whole module. The part with the selector levers for heat and AC that slide horizontal and the air blower half knob or what ever you would call it. That fixed my AC system. I am not exactly sure where the Brake switch is located. I took my Jeep to the dealer so they changed out the Brake switch but I would be willing it is not hard to change out. I would have to look through my Jeep shop manual to be sure though. Have you checked the vacuum lines in your engine compartment from the vacuum reservoir? The very first time I was having a problem with my Cruise Control I found a small hole in my vacuum line right before the reservoir where the line was rubbing on the framework. When I checked my AC I pretty much new it was that control unit after checking the vacuum that I had going to it. It is not hard to replace it is just a little time consuming. If you would like more info. You can e-mail directly if you like. Click on my name on above this post and it will give you my e-mail address and I can go in to detail of what I did to troubleshoot my problems as well as pictures of what was done. Good luck.
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- #10 of 45
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2002 JEEP GRAND CHEROKEE -- CRUISE CONTROL INTERMITTEN (re my Aug 12 msg)
by bheiar
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Oct 01, 2007 (3:09 pm)
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Have had my 2002 Jeep Grand Cherokee in the shop 6-7 times in the past month and a half for cruise control problems($200 diagnostics charge) It would set a code in the computer, but as soon as you'd turn off the ignition the computer would reset with no code. When they finally did catch the code while the engine was still running, the code could not be identified (no one including tech support could trouble shoot the codes). The PCM was replaced(at no charge), but the cruise still cut out when test driven afterwards. FINALLY!!! Somebody started checking different switches and modules/relays that effect the cruise control. It was determined the the brake switch was not sending the correct signal to the PCM and/or cruise control assembly. I was told that the brake switch was replaced, and now everything seems to be working at this time. I have been driving the vehicle for about 6 days now(that's the longest I've had it out of the shop in the past month and a half. I'll keep my finger crossed.
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