My cruise control will not engage. It was fine and then it just would not engage anymore. The light comes on but when I releave the gas pedal it just wont hold it. Is there a fuse or something for this.
The most common solution is to replace the brake light switch . The switch has 3 sets of contacts one set is for the cruise control. If the cruise control part is at fault the cruise control will not engage. The switch typically costs from 10 to 15 dollars.
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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.
It can be faulty
cruise control switch. If the switch is replaced, then it can be wiring issue
or faulty cruise control board. But as the switch is replaced, get the voltage
at the switch tested to confirm the switch is actually receiving voltage. If no
voltage received at switch power supply wire then, apply external 12
volt power to the cruise control switch wire and then see if cruise control
comes ON. If yes, then you know wiring is issue.
On this case, to
troubleshoot this problem, there are solved help links. Click the link directly
and refer the details to solve this problem yourself, with help of diagrams:
Cruise controls can cease to engage if the clutch or brake light cruise switch are out of adjustment. If this happens, try placing you foot under the clutch pedal (if equipped) and lift up on it (toward you) and hold it while engaging the cruise. If it now works, it will likely cut out when you remove your foot from under the pedal. Check the brake pedal in an identical fashion. Adjusting the switch at the pedals can often solve he problem. Some vehicles (Honda, Acura, Ford, to name a few) have a plastic insert that mounts in the pedal arm which presses against the switch. These can become brittle and fracture into pieces. My Acura has little pieces of blue plastic on the floorboard around the brake pedal one afternoon and I noticed the cruise didn't work. It was the pieces of the insert that had come to pieces preventing the cruise from coming on. I replaced the insert and no more problem with the cruise.
You're not gonna believe this but if the center brake light is out on a 2000 ML320 the cruise control will not work. I went over the owners manual with a fine tooth comb and not once did it mention the center brake light in conjuction with a malfunctioning cruise control. The book did state however to bring the car into an authorized Mercedes Benz dealer.
Faulty product. I install cruise control for 6 years. One of the cables are hooked into the throttle and the other in the vaccuum actuator, since it is electronically controlled actuator, the object itself might be losing it's contents or frankly worded, is taking a nose dive. works much like a brake booster does.
Is it a PID system? (Proportional integral derivative system)
or is it just standard proportional?
That will play a factor.
If you just have one of those cheesy controls (cruise controls), than replace it, obviously it wouldnt of cost much. if it is not, check the actuator and replace it! Replace the Fuse, brush it with wire brush, clean up all connections.
You should be ready to roll!