Question about 1999 Pontiac Montana

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Cruise control not working when it was it seammed to make the motor run very ruff when i disengaged it by using brake pedal

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  • Pontiac Master
  • 6,826 Answers

If the cruise control makes the engine seem to run very rough until disengaging it, there could be a problem with the engine itself. As, most cruise control systems just pull on the throttle cable to maintain speed on the highway based on setting the speed with the button.

So, I would look into the engine maybe having an issue with spark plugs, or wires, or another tuneup or mechanical issue.


Cruise Control Cable Removal & Installation To Remove:
cruise control not working when it was it seammed - chev_vent_cruise-cont-cabl-at-tb.gif

  1. Before servicing the vehicle refer to the precautions at the beginning of this section.
  2. Remove or disconnect the following:
    • The cable from the throttle lever and the accelerator control cable bracket gm_mv_ven_cruisecable.gif

    • The cable from the module by rotating the cable counter clockwise at the module
    • The cable from the module band
To Install:
NOTE: Ensure that the module strap is not twisted during cable installation
  1. Install or connect the following:
    • The cable to the module band
    • The cable to the module
    • The cable to the throttle lever and the accelerator control cable bracket
  2. Adjust the cruise control cable.
prev.gifcruise control not working when it was it seammed - next.gif="http://arrc.epnet.com/autoapp/CHEVY_VENT_97-05_D4/CHEVY_VENT_97-05_Ch6_Adjustment.htm">next.gif Cruise Control Module Removal & Installation To Remove:
  1. Before servicing the vehicle refer to the precautions at the beginning of this section.
  2. Remove or disconcruise control not working when it was it seammed - gm_mv_ven_cruisecable.gif gm_mv_ven_cruisecable.gif

    The cruise control cable from the module

  3. The electrical connector gm_mv_ven_cruisebolt.gif

  4. The mounting bracket bolt from the cruise control module
  5. The cruise control module from the mounting bracket
To Install:
  1. Install or connect the following:
    • The cruise control module to the mounting bracket
    • The mounting bracket bolt to the cruise control module
      1. Torque to 53 inch lbs.(6 Nm)
    • The electrical connector to the module
    • The cruise control cable to the module

Posted on Oct 11, 2010

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Check the wire connector that plugs into the cruise control under the hood. Sounds like a loose connection. Remove the and reinsert the wire connector several times to make a better connection. Stepping on the brake pedal disengages the cruise control by a switch on the brake pedal, not the computer.

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Cruise control notworking on a 2002 F150


cruise controls are controlled by the following switches and sensors
1 the switch itself
2-- the clutch pedal sensor or the VSS in the auto transmission
3 the brake sensor ---4-- the gear change switch or selector
5-- the engine speed sensor ( tacho)
6-- the road speed (VSS )
if 1 or a combination is not working or is outside parameters , the cruise control will not switch on
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changing gears in a manual will disengage CC
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Why do brake lights stay on while diving and cruise control doesn't work?


If the brake light switch connected to the brake pedal has failed, the brake lights are stuck on which fools the cruise control into disengaging.

Sep 16, 2015 | Cars & Trucks

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Cruise control not working


several places to start looking check connections at cruise module under hood check vac connections make sure your brake light switch is functioning properly use a test light to check for a signal at the brake lite switch by engaging and disengaging the brake pedal check connections by the multi function switch block on the rt side of the steering column check for a signal be again engaging and disengaging the cruise control control switch or if you have access to a tech2 these test can be made thru it check all fuses related to system

Sep 04, 2012 | 1993 Chevrolet Suburban

1 Answer

Cruise control not engaging


Hi there,

As you have not stated the Model of Chev, nor the Year of Manufacture, I will give you some general possibilities:

* Blown fuse
* Short or open in Cruise Control circuit
* Faulty brake switch
* Leaking vaccuum circuit
* Faulty cruise control switch
* Faulty stepper motor
* Faulty transducer
* Faulty speed sensor
* Faulty cruise control module

As with all electrical circuits, you should first check the FUSE.

However, from experience, the most common cause of inoperative Cruise control are:

Brake pedal switch: check that tail lights illuminate when depressing the brake pedal. If not, then replace the brake pedal switch (located up on the brake pedal assembly).

Brake pressure switch: depending on which model Chev you have, there is an electrical switch (look for wires) screwed into the brake cylinder (attached to the brake booster). This switch is a cruise system backup from the pedal switch and measures brake fluid pressure, to disengage the cruise control. When this switch fails, the Cruise Control will not engage. If you have a multimetre, you can test the resistance on the switch terminals (ask Chev for the correct resistance spec) - if not to specification, then replace the switch.

Cruise control release valve: this is the alternative to the brake pressure switch and is also mounted on the brake pedal, above the brake switch. This switch is designed to disengage the cruise control, just like the pressure switch. If you have a multimetre, you can test the spec of this switch (ask Chev for the correct test procedure & specs) - if not to specification, then replace the switch.


NOTE: depending on the year of your vehicle, your local Chev Dealership will be able extract the Cruise Control fault codes, stored in the Cruise Control Computer. This is always the fastest (and cheapest) way to identify the suspected component and will eliminate unnecessary "trial and error" labor costs. This test cannot be done by your typical garage and must be entrusted to your Chev approved service agent only, who will have the correct Scan Tool.





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Jul 31, 2011 | Chevrolet Chevy Cars & Trucks

2 Answers

I own a 2005 GMC Canyon Five CYL and the cruise control stopped working last niight. You push the button and no cruise. I checked the fuse and it is ok I exchanged with another 10AMP and no change still...


Start with the simple and check the fuses and the Stop lamp switch. Check your brake lights, if they're not working, the cruise won't work either. If they're not working, check the fuse for them, if the fuse is fine, then take it into the dealer, there's been a recall issued on the brake switch, so it should get fixed for free.
Cruise Control Disengaged
The powertrain control module (PCM) disengages the cruise control operation based on the signals from the following switches:

* The stop lamp switch
* The TCC brake/cruise release switch
* The clutch release switch, if equipped
* The cruise control On/Off switch

The TCC brake/cruise release switch and the stop lamp switch are mounted on the brake pedal bracket. When the brake pedal is applied, the normally closed TCC brake/cruise release switch opens and the normally open stop lamp switch closes. The PCM detects a low signal voltage on the TCC brake/cruise release switch signal circuit and a high signal voltage on the stop lamp switch signal circuit. When the clutch pedal is applied, the normally closed clutch release switch opens and the PCM detects zero voltage on the CCP switch signal circuit. The vehicle speed stored in the memory of the PCM will be erased when the cruise control On/Off button is turned OFF, or the ignition switch is turned OFF.

The Cruise Control System will disengage when the PCM detects that a driver override function has been active for approximately 60 seconds .

When the Cruise Control System is disengaged, the PCM sends a class 2 message to the instrument panel cluster (IPC) in order to deactivate the cruise control indicator.

Cruise Control Inhibited
The powertrain control module (PCM) inhibits the cruise control operation when any of the following conditions exist:

* A cruise control related DTC has been set.
* The vehicle speed is less than 40.2 km/h (25 mph) .
* The vehicle is in PARK, REVERSE, NEUTRAL, or 1st gear.
* The engine RPM is too low.
* The engine RPM is too high, with fuel cut off.
* The vehicle speed is too high, with fuel cut off.
* The system voltage is not between 9 volts and 16 volts .
* The Traction Control System (TCS) is active for more than 2 seconds .

Thank you for using Fixya and start with replacing the stop lamp switch. Even though the brake light work, it;s been known for that switch to cause your issue. that's way there was a recall for it.

Apr 01, 2010 | 2005 GMC Canyon

1 Answer

Speedo cruise on the audi 100 does not work


The cable was probably not reattached to the throttle body, or the wiring for the cruise module was not plugged back in. The VW/Audi cruise control system does not use engine vacuum, it uses it's own vacuum pump. Vacuum runs from the pump/control module to the vacuum reservoir that pulls on the throttle cable. The is also another vacuum line that runs to the brake pedal, which is a safety feature (press the brake pedal and the vacuum to the vacuum reservoir is instantly cut, releasing the throttle and disengaging the cruise control.)

Jul 15, 2009 | 1993 Audi 100

1 Answer

Cruise control how to use


Most cruise controls are designed to disengage when you press the brake pedal. I always mention this first because people tend to try to press the clutch pedal while the cruise control is engaged and this startles them when the engine revs up all the way...

Anyway, to use your cruise control:

1) Press the Cruise control button to on.
2) Drive up to the speed you need to go.
3) Press the "Set/Coast" button.
4) let go of the accelerator pedal

If the cruise control system is operating correctly, your vehicle will continue to travel at the same speed until you either press the brake pedal or you cancel the cruise setting with the cancel button of the cruise control.

Remember: Your civic is not equiped with a radar system for your cruise control, so if you are aproaching an intersection or traffic in front of you, do not expect the car to know it needs to stop. Also, cruise control only operates the accelerator pedal i your car, it is not autopilot, so it will not steer your car for you.

(you think it sounds silly that I am writing this? You should see my friend's car... He thought Cruise control was like autopilot, so he smashed his brand new civic into a tree...)

Happy Motoring!

May 21, 2009 | 2002 Honda Civic

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