Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. Symptoms of a Bad or Failing Cruise Control Vacuum Bleed Switch

Symptoms of a Bad or Failing Cruise Control Vacuum Bleed Switch

vacuum bleed switch

The cruise control feature is an optional feature found on many road going vehicles. When activated, it will automatically maintain the set vehicle speed and acceleration without the need for the driver to step on the accelerator pedal. This increases fuel efficiency as well as reduces driver fatigue. The cruise control system is wired with several redundant switches that will deactivate the system when they are tripped, to stop the vehicle from accelerating so that the driver can safely apply the brakes and shift gears.

One of these redundant switches is the cruise control vacuum bleed switch. Some cruise control systems use a vacuum operated servo to hold the vehicle at a steady speed. The switch is mounted on the brake pedal and tripped when the pedal is depressed. When the switch is tripped the vacuum is released from this servo, releasing the throttle so that the vehicle can safely decelerate. As the vacuum bleed switch is the one controlled by the brake pedal, one of the most important pedals in operating a vehicle, it is an important switch to the proper functionality of the cruise control system and any issues with it should be serviced.

1. Cruise control does not disengage when pedal is pressed

The most common symptom of a problem with the cruise control vacuum bleed switch is a cruise control system that does not disengage when the brake pedal is depressed. The switch is mounted at the base of the pedal and deactivates the cruise control system when the brake pedal is depressed so that the driver does not have to brake against an accelerating engine. If stepping on the pedal does not switch off the cruise control system, then that may be a sign that the switch has failed.

2. Cruise control disengages on its own intermittently

Another symptom of a potential problem with the cruise control vacuum bleed switch is a cruise control system that disengages intermittently without the brake pedal being depressed. If the cruise control system is intermittently self-disengaging, then this may be a sign that the switch may be having an internal or wiring issue that may be tripping the switch even when the pedal is not depressed.

3. Hissing noise coming from under the dash

Another symptom of a possible problem with the cruise control vacuum bleed switch is a hissing noise coming from underneath the dash. For some vehicles, the vacuum is routed directly to the switch on the pedal underneath the dash. If the switch or any of the hoses break, it may cause a vacuum leak which will negatively affect the operation of the cruise control system.

For vehicles equipped with them, the cruise control vacuum bleed switch is an important component of the cruise control system. It allows the driver to have an instantaneous way of deactivating the cruise control system just as they are about to slow down, and is very important to the ease of use and operation of the cruise control system. For this reason, if you suspect that your cruise control system may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic. They will be able to determine if your vehicle needs a cruise control vacuum bleed switch replacement.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Still not sure about your car's issue?
Diagnose your car
What kind of issue are you experiencing?
Brakes are squeaking
Car is not starting
Car is overheating
Car is shaking (vibrating)
Fluids are leaking
Heating and A/C
Smoke or steam is coming out of the car
Warning light is on
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How to Find the Keyless Code on a Ford Explorer or Mercury Mountaineer
Many Ford Explorers and Mercury Mountaineers were manufactured with an option known as the Ford keyless entry keypad. Some models refer to it as SecuriCode as well. It...
P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...

Related questions

Q: on/off humming buzzing noise on highway

Hey there, it looks like there was a problem with the link you added. However, from what you described, it sounds like the noise may be the cooling fan coming on and off as you are driving. Check the cooling...

Q: ESP Light and column electrical failures after a sharp turn.

That must have been one hard turn! The ESP light is for the Electronic Stability Program: a system built into your braking system to help prevent the car from going out of control in a sharp turn. You could have...

Q: How do I use the driver power window controls?

The driver’s door has switches to control all four of the windows. These switches are set up to correspond with the windows they control (for example, the front left switch controls the driver’s window, while the back right switch controls...