Cruise control problems -
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post #1 of 23 Old 02-15-2010, 11:20 AM Thread Starter
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Cruise control problems

Hey guys, I've been having some problems with my cruise control on my 05 hemi. I'll hit the button on the steering wheel and it often won't turn on, the light on the dashboard doesn't show up...nothing. Other times I'll be able to get the cruise light to turn on for a second and for the cruise to engage, only for it to shut off a few seconds later... was wondering if anybody had any insight on this, as to what it could be?

appreciate the help
thanks guys

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2005 Jeep Grand Cherokee Limited Hemi

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post #2 of 23 Old 02-27-2010, 05:37 PM
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almost same issue but mine will not turn on at all. its probally something really dumb like a broken wire but thats jeep electronics!
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post #3 of 23 Old 02-27-2010, 11:47 PM
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This will sound incredibly stupid... very incredibly stupid, but check your brake fluid level.

I had my Cruise Control take a dump half way through a 4,100 mile trip a couple of months ago and I went through everything I thought it could be... rebooted the computer, checked the fuses, etc... and found my brake fluid extremely low. I didn't think anything of it, and topped it off just to do it before taking off again and the Cruise Control started working again. I haven't had a problem with it since.

Like I said, I seriously doubt this was the cause of my problem and I'm embarrassed to offer it as a possible solution, but it can't hurt to check. I can't possibly imagine how the two systems are related... at all.

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post #4 of 23 Old 02-28-2010, 11:51 AM
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ok so did some investigating last night. mine will turn on when the vehicle is not running, but if i start the engine and go to drive the cruise light turns off and will not turn back on. really puzzled as to what the dealio is. will check brake fluid level, maybe thats the mystery fixer.....?
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post #5 of 23 Old 08-06-2011, 11:59 AM
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Did you ever find out what the issue was? My 06 is doing the exact same thing. The cruise control light turns on and the cruise will set. After a random amount of time (sometimes almost instantly, sometimes after quite a few miles) the cruise control light turns off and will not turn back on. Restarting the vehicle will get it to turn on, but then it just turns off again. I tried disconnecting the battery for a while... still the same issue with the cruise control. I've been searching forums, but can't find out what the issue is.
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post #6 of 23 Old 08-06-2011, 12:40 PM
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After checking for codes by turning my ignition off and on 3 times I found these three codes: p0592, p0591, p0585. I did a quick google search and found this info from

P0592 - Speed Control Switch 2 Circuit Low
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- Engine Light ON (or Service Engine Soon Warning Light)
Possible causes
- Short to ground speed control switch circuit
- Faulty Clockspring assembly
- Faulty speed control switch
When is the code detected?
The ECM has detected that the speed control switch 2 is below minimum voltage range
P0592 Information for specific makes

P0591 CHRYSLER - Speed Control Multiplexed Switch Performance
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- Engine Light ON (or Service Engine Soon Warning Light)
Possible causes
- Open or short speed control switch circuit condition
- Poor speed control switch electrical connection
- Faulty speed control switch
- Failed SCCM
When is the code detected?
The Steering Column Control Module (SCCM) has detected that the Speed Control Switch 2 is not operating correctly

P0585 JEEP - Speed Control Switch Correlation Error
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- Engine Light ON (or Service Engine Soon Warning Light)
- Cruise control system inoperative
Possible causes
- Clock spring circuit is open or short
- Clock spring poor electrical connection
- Faulty clock spring
Tech notes
This code can be set if two different control buttons in the cruise control system are press at the same time for more than 450 milliseconds. Since it is a logical problem and not a mechanical problem, try resetting the light first before replacing any parts.
When is the code detected?
The ECM compares the cruise control switch 1 to switch 2- A signal error was recognized
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post #7 of 23 Old 08-17-2012, 07:25 PM
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The Dentist, did you ever find a fix?

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post #8 of 23 Old 08-20-2012, 07:19 AM
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My 06 WK Limited has a problem with the cruise as well, just quit working last week, switch appears to be shot, pushing the button does nothing.

Previously owned jeeps:
'06 Grand Cherokee Limited w/4.7L V8 & QD2
'98 Grand Cherokee Limited w/5.2L V8 & Quadra Trac - sold at 230k miles
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post #9 of 23 Old 06-20-2013, 07:58 AM
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Resurrecting this old thread. I bought an 05 hemi last fall. Everything about the vehicle is perfect, but the cruise has never worked. The seller told me the Hemi has a feature where it kicks down to 4 cylinders while on cruise control on the highway, and I imagine that would save me quite a bit on fuel when I take the Jeep on long trips. Definitely want to get to the bottom of this. Anyone ever solve it?

Edit: Did some tooling around this morning on this one. If you google for solutions, you'll find a lot of folks talking about issues with vacuum hoses. I think it's safe to ignore those, as you'll notice all of those complaints are for the preceding design of the Jeep GC. Ours appears to be a unique animal.


Last edited by faja2008; 06-20-2013 at 10:17 AM.
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post #10 of 23 Old 07-05-2013, 10:59 PM
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There is a vacuum tube that runs along the top of the firewall to somewhere around the throttle body, I never followed it all the way out but if this vacuum tube is screwed up and leaking your cruise control will not work. Voice of experience on my 99.

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post #11 of 23 Old 07-31-2013, 04:35 PM
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Ok so I've read every thread on this fourm and talked to 2 jeep dealer service dept. I just bought the wife an 06 wk and the cruise doesn't work or even display also I've tried pulling codes by turning ign from off to on 3x and no codes all vacuum is good I found somewhere that fixed it by changing the break light switch. I talk to guy at the dealer ship he told me that the cruise and break light are not on the same circuit and that would have no effect and it must be a fault in one of the components I'm all out of ideas I even topped off the break fluid so please HELP ME !!thnks
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post #12 of 23 Old 06-02-2014, 10:29 AM
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Any fixes for this yet guys? My cruise light will come on, but will not set the speed. I've already replaced the brake light switch and adjusted it, but I'm still cruise-less. Am I correct in thinking that this is all electronic? No vac lines controlling cruise control anymore?
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post #13 of 23 Old 06-07-2014, 02:37 PM
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The only time I've encountered this issue was when my ABS sensor was acting up. This would also deactivate the ESP. Once I replaced the sensor in the wheel bearing, everything was fine.

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post #14 of 23 Old 11-07-2014, 09:02 PM
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Cruise Control Problem and ESP

I have a 2008 v6 jeep Grand Cherokee an the cruise control wont turn on, wont even turn on the dash board nothing happen when press cruise control and ESP button not working.
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post #15 of 23 Old 12-14-2014, 10:00 PM
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My wife's cruise control went out last week, The vehicle died and then the engine light came on and stayed on for about 3 days and then went off. But the cruise is still not working.
2006 Grand Cherokee Laredo
4.7 V8 2 WD
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