Cruise control light come on but CC doesn’t work

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Shad Enroughty

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2012 2500 4wd 6.7L Laramie
Cruise control light will come on in dash from steering wheel switch but nothing else. It hasn’t worked since I’ve had the truck. Any ideas where to start?
 

crazykid1994

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How long have you had the truck? I would say it could be Either a bad switch assembly or possibly a faulty brake pedal sensor or even a faulty wheel speed sensor. Generally the wheel speed failing will throw up an abs warning light.
 

Dean2

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U have a lot bigger problems than your CC not working. Fix what is wrong with all of those systems. The lights are there for a reason. Jeeze Louise!
 

Jeepwalker

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Those issues and lights were all 'on' on my truck shortly after I bought it. It turned out to be the brake pedal switch. That might not be your issue, but it's pretty common. Like others have suggested, have the vehicle computer scanned at a part' store (for free) and read what the codes are. Often it's an intermittent (faulty) brake switch. Those brake switches are like $40 (amazon) and weight about 10 grams. They feel exceptionally 'cheap' -- no wonder they crap out all the time. Easy to replace yourself in about 10 min. If your truck has age and miles, probably wouldn't hurt to replace anyway it as a preventative measure. But it could also be a wheel speed sensor too, a faulty or corroded fuse in the fusebox ...maybe even a steering angle sensor issue, which a scan should help 'tease' out. But I would suspect the brake switch first. I would only buy a Mopar switch considering the degrading state of aftermarket products. Probably a Standard (brand) part *IS* a mopar swithc in another box, but who knows? Bear in mind, it only takes an intermittent issue of the switch to disable the systems. On my truck I watched with the scanner as I pressed the pedal. I wasn't seeing any issues watching the brake switch activate (real time readings) ...but then one time I DID see it not work properly. So, even if your taillights seem to be working fine, 1 out of 10 times the switch could operate intermittent and the computer will throw a light and possibly disable those systems you described. The same holds true for the other potential possibilities.

You should get those fixed rather than trying to further disable them. Just last night I had 3x deer trot across the highway RIGHT in front of me. I slammed on the brakes (not that I had much room to slow down) ...and had to make a violent L-R-L turn action into the other lane ...missed them by inches. A vehicle was coming the other way towards me ..but far enough away I knew I could get back on my side of the road (it was dark out). I'm pretty sure I could feel the traction control kick in during the violent lane-change maneuver. It seemed like the truck was a lot more composed than I believe it might have otherwise been. It happened so quick it was hard to tell. But Man, it woke me up ...ha ha.

The point I'm (and others) are making: Please get it fixed, for your own safety as one of the Ram brethern. Even if you have to take it to the dealer. Might save your life (or truck) ...you never know. Or looked at another way, the money it might cost to have a dealer repair it could be less than your insurance deductible if you were to get into an accident.

Good luck!
 
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Shad Enroughty

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Thanks for everyone’s help . I inherited the truck a few months ago and all the lights were on. It has over 250K miles so I’m sure a lot of sensors etc. need replacing.
Jeepwalker thanks for the detail & your deer experience.
 

MontanaHandyman

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Mine had the same issue. The dealer replaced the ECM and all is well since. Thankfully it was under warranty still.
 

Jeepwalker

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Yeah, unfortunately, these are just the kind of pesky electrical isses that happen a lot more on 'modern' vehicles where a guy almost NEEDS a good real-time scanner as part of his tool-kit anymore just to do basic troubleshooting. And it's only getting worse with driver 'aids' (lane keep/collision avoidance/LCD interfaces, etc. Fortunately you can usually get a good scan at a part's store but it's hard to do on-going troubleshooting when you're relying on someone else.

Man, some parts stores I've been to seem to do a steady-stream of customer vehicle scanning. I wonder how long they can keep it up before they start to charge a nominal fee.
 

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