Cruise control engages sometimes

Most cruise controls are vacuum actuated. check for vacuum leaks. This also occurs at the brake petal where cruise is disengaged, check for proper adjustment on the cruise switch.

have you got a bad antilock brake sender maybe a code scan at autozone then google what codes you find include our car in search term and code

Try checking the small switch at the top of the brake pedal. There may be two one for brake lights and one for the cruise control. To ascertain what is what, pull one wire off and see if brake lights work. If not, then the other switch controls the cruise control disconnect and engage..I you have a DC test light check to see if power is on on both side of the switch with brake pedal up. If so, depress pedal and check power on the other side there should be none, if there is the switch is defective.

Hi, This needs a new cruise control switch fitting not a job for the faint hearted there are a lot of wires that need to be connected properly, recommend any good vehicle electrics company or cruise control specialist is best. Please give feedback at [email protected] Thanks, Malcolm Campbell.

I press the control switch on my 1999 Jeep cherokee. the cruise light doesn't come on and the cruise does not engage. Please offer a solution.

you might have a vacum leak at the unit under the hood or the actuator

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.

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!

Check the cruise control module connector, see if it looks good and there is power to the module over one of the white wires in the 10 pin connector.
There are two white wires going to the module which is located at pins "G" and "J". There should be no voltage at pin "G" until the brake switch is applied. This switch is also used to operate the brake lights. The two wire colors on this switch are white and orange. At pin "J", this signal goes to the PCM to tell it that the cruise control module is engaged. Here is the info on the cruise control connector:

Pin A: gray - cruise control on switch signal: 12VDC with cruise switch on
Pin B: dark blue - cruise control set/coast switch signal: 12VDC with switch pressed
Pin C: gray/black - cruise control resume/accel switch signal: 12VDC with switch pressed
Pin D: brown - cruise control release signal: 12VDC with brake pedal not pressed: 0V when pressed
Pin E: black/white - ground
Pin F: brown - ignition 3 voltage: 12VDC with ignition on
Pin G: white - stop lamp switch signal: 0V with brake pedal not pressed: 12VDC when pressed
Pin H: dark green - cruise control inhibit signal: 0V if PCM detects an inhibit condition
Pin J: white - cruise control engaged signal: voltage (unsure of value, either 12VDC or 5VDC) when signal engaged
Pin K: dark green - vehicle speed signal: 1 to 5 volts depending on speed

This view of connector is facing it after it is separated.

Trying to post the connector view, the lines may not quite line up, but at least it should show you the pin positions.

| F  G H J K |

| E D C B A |