Question about 2005 Jeep Grand Cherokee

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Cruise control Turns off intermittantly

I bought this jeep yesterday. The cruise control turns off when I try to set the speed. It then will not come back on unless I turn off the Jeep and start it back up. It worked for a day and then just started doing this.. I don't believe it is vacuum related, I think it is Cruise switch related.. But I wanted to throw it out there and see what you guys thought. I have a 2005 Jeep Grand Cherokee Laredo with approx:47,000 miles. Just yesterday my cruise control stopped working. When I turn the ignition key off, let it sit for a while, and then turn it back on, the cruise will work momentarily before it fails again. If I let the car sit overnight, my cruise will work for a while before it shuts off. It seems that after the car gets warmed up the cruise on/off switch becomes unresponsive, the indicator light on the dash does not come on, and I am left with no cruise option. I'm not familiure how the cruise control system works, whethere there is some sort of vaccum issue, or electronic issue. I can't imagine that it is an electronic failure, because them my cruise wouldn't work at all. There has to be some connection with why the cruise works when I first start the Jeep, and then after it runs for a while, the cruise indicator light turns off, and the switch becomes un-responsive. Any clues?? I'm hoping this isn't an expesive fix...

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  • HGalle19 Feb 10, 2009

    I have the same problem. I also have a 2005 Grand Cherokee. It just started to do this a couple days ago. It's all the exact same as to your problem. What did you end up doing with it?

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You're probably not gonna like this answer, but hwen it comes to electrical problems, you really do need to take it to a garage/mechainc that you trust.

I know I couldn't talk you through what you need to do to fix it, especailly with the Jeep not right in front of me.

If you bought the Jeep from a dealer, take it back there right now, and tell them the cruise troubles you're having...most dealers will fix the problem even on aused car because they want the good news to travel that they took care of you.......they don't want anyone walking around with bad things to say about them.

Good Luck, let us know what ahppens, okay?

Posted on Jan 08, 2009

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Posted on Jan 02, 2017

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1 Answer

Where is the fuse for cruise control on a 2003 envoy


It is HVAC 1fuse #39 in the rear fuse block ,this powers the on/off switch for cruise control ! Fuse Block - Rear Beneath the left rear seat. What engine does it have ? 4.2 L or 5.3 l There is no vacuum involved in the operation of the cruise control ! Your vehicle has electronic throttle control .
Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions at vehicle speeds above 40 km/h (25 mph). Steep grades may cause variations in the selected vehicle speeds.
The following are the main components of the Cruise Control System:
?€¢
The powertrain control module (PCM)


?€¢
The On/Off switch


?€¢
The Resume/Accel switch


?€¢
The Set/Coast switch


?€¢
The TCC brake switch


?€¢
The stop lamp switch


?€¢
The throttle actuator control (TAC) motor


?€¢
The vehicle speed sensor


Cruise Control Engaged
The cruise control system will engage and adjust the vehicle speed based on the activation of the following cruise control switches:
?€¢
On/Off


?€¢
Resume/Accel.


?€¢
Set/Coast

The cruise control switches are located on the multifunction/turn signal lever.
The powertrain control module (PCM) monitors the signal circuits of the cruise control switches in order to determine when to capture and maintain the selected vehicle speed. The PCM uses the throttle actuator control (TAC) module motor in order to control the vehicle speed. For further information on the TAC System, refer to Throttle Actuator Control (TAC) System Description in Engine Controls - 4.2 L.
Ignition positive voltage is supplied from the 10 ampere HVAC 1 fuse to the cruise control switch via the ignition 3 voltage circuit. When the normally open cruise control On/Off switch is turned On, the switch closes and the PCM detects a high signal voltage on the cruise control on switch signal circuit. When the normally open Set/Coast switch is pressed, the switch closes and the PCM detects a high signal voltage on the cruise control set/coast switch signal circuit. To engage the cruise control system, turn the On/Off switch On and momentarily press the Set/Coast switch. The PCM will confirm that the cruise control enable criteria has been achieved. The PCM will engage the cruise control system and record the selected vehicle speed. The PCM sends a class 2 message to the instrument panel cluster in order to illuminate the cruise control indicator. Pressing the accelerator pedal, while the cruise control system is engaged, will allow the driver to override the cruise control system in order to accelerate the vehicle beyond the current set vehicle speed. When the accelerator pedal is released, the vehicle will decelerate and resume the current set vehicle speed. The driver can also override the current set vehicle speed via the Set/Coast switch and the Resume/Accel switch. When the cruise control system is engaged, pressing and holding the Set/Coast switch will allow the vehicle to decelerate from the current set vehicle speed without deactivating the cruise control system. When the Set/Coast switch is released, the PCM will record the vehicle speed and maintain the vehicle speed as the new set vehicle speed. When the cruise control system is engaged, momentarily pressing the Set/Coast switch will allow the vehicle to decelerate at 1.6 km/h (1 mph) increments for each time that the Set/Coast is momentarily pressed, with a minimum vehicle speed of 37 km/h (23 mph). When the normally open Resume/Accel switch is activated, the switch closes and the PCM detects a high signal voltage on the cruise control resume/accel switch signal circuit. Activating and holding the Resume/Accel switch, when the cruise control system is engaged, will allow the vehicle to accelerate to a greater vehicle speed than the current set vehicle speed. When the Resume/Accel switch is released, the PCM will record the vehicle speed and maintain the vehicle speed as the new set vehicle speed. When the cruise control system is engaged, momentarily activating the Resume/Accel switch will allow the vehicle to accelerate at 1.6 km/h (1 mph) increments for each time that the Resume/Accel switch is momentarily activated, with the maximum acceleration total of 16 km/h (10 mph) over the current set vehicle speed . Momentarily activating the Resume/Accel switch, after the cruise control system has been disengaged by pressing the brake pedal, will recall the previous set vehicle speed that is recorded in the PCM.

Sep 11, 2015 | Cars & Trucks

2 Answers

How do I set cruise control on 2001 buick lesabre limited. just bought car have no manual. cant get it to set.


If you push on and set and nothing happens, the system may not be working properly.
You can get an owners manual on Ebay.

Mar 22, 2015 | 2001 Buick LeSabre Limited

1 Answer

How do you activate the cruise control on a Mercedes ML 270 cdi.


If you know how to set your speed limiter. To set your cruise control, press the stalk in (to the right). The orange light on your dash should go out and you're ready to set your cruise control. You can start the cruise control by either moving the cruise control stalk up or down. Once you start the cruise control you can move the stalk up or down to increase or decrease your cruise speed. You can move it toward you to shut off the cruise control. You can press it in again to go back to the speed limiter. I hope this helps.

Oct 20, 2014 | Cars & Trucks

1 Answer

How can i activate my cruise control in my 2004 grand cherokee


The cruise control switches are located on the steering wheel. When the cruise control is turned on there will be a green light luminated on the dash that says "cruise". When at the desired speed press "set" to set the cruise control at that speed.

Oct 09, 2010 | Jeep Cherokee Cars & Trucks

2 Answers

Location of the cruise control fuse in a 1995 jeep cherokee


Check this out also...the schematic is too small to see which fuse it is in the engine compartment Power Distribution Center (the fuse box). Is your cruise control not working?

Cruise Control The Cruise Command system is electrically actuated and vacuum operated. The turn signal lever on the steering column incorporates a slide switch which has three positions OFF, ON or RESUME. A SET button is located in the end of the lever. This device is designed to operate at speeds above approximately 35 mph (56 km/h).
The speed control module automatically controls throttle position to maintain a speed set by the operator. The vehicle will keep the set speed unless the driver presses the brake, clutch or accelerator pedal.

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Exploded view of the cruise control switch and related components


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vehicle speed sensor location

Oct 18, 2009 | 1995 Jeep Cherokee

1 Answer

I have a 2008 Honda CRV and for the life of me I cannot engage the Cruise control- I press the Cruise Button on the right of the steer wheel and nothing happens - nothing Help anyone ? Tks Nancy


The cruise-controls have 2-buttons that must be activated before it gets the car going when you remove your foot off the gas-pedal.
The cruise button is essentailly a switch that turns 'on' the cruise servo-motor that tells the sytems that you wants to use it, so it gets ready.
There are other three switches on the right-side of the steering wheel namely: resume accel; cancel; set decel.
To get your car to cruise: you must steady your speed and foot on the gas-pedal. You cannot just press the switches and expect the car to cruise. It takes about two-to-three seconds for the system to respond to a set cruising speed.
How to do it: accelerate to a speed of about 30-mph. Press the 'cruise' button on the dash first. Next you press 'set decel' button. This will turn 'on' the cruise control light on the instrument panel. Then wait a second or three and you would feel the cruise engagement. Any touch on the brake pedal will slow down the car and turns the cruise off. The 'cancel' button turns off the cruise light on the instrument panel.
If you hit the brake-pedal at any time for any reason, and you would like to continue cruising again, simply press the 'resume accel' button.
The cruise system works in conjunction with the braking system of the car. So all major parts of the braking system must be in good condition, otherwise the cruise system could shut off itself.





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2 Answers

My brother just bought a 2004 Lincoln Town Car Signature.....I helped him find this car and he now tells me that the cruise control does not work.....My guess is that he is trying to set the speed and not...


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1 Answer

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Hope this helps. I will address overdrive in another post. Thanks, TaterTodd

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