I have a 2005 ram 1500 4x4 and my cruise stops workinf at 65 mph, but it works fine below 65. Any suggestions?

 

Stay below 65? hahah sorry I couldn't help it. I have no real solution.

 

My cruise control doesn't even turn on. I used it once then it never worked again. If anyone knows what fuse it is can you please tell me. The fuse box doesn't have a cruise control fuse on it.

 

Look underneath the battery for a loose, deteriorated, or leaking vacuum supply hose at the speed control servo. Battery acid drips on this hose and destroys it.

The Cruise Control uses a Vacuum Reservoir so if the hose is gone, or damaged the system will fail. The reservoir contains a one-way check valve to trap engine vacuum in the reservoir.
When engine vacuum drops, as in climbing a grade while driving, the reservoir supplies the vacuum needed to maintain proper speed contro. The vacuum reservoir cannot be repaired and must be replaced if faulty.
There was a TSB out on this, for 2nd gen Rams, but knowing Chrysler's rep for not solving problems over years and generations (can you say "C-Clip", "Transmission", "Crancked Dash"?) it's a good bet that could be your cruise control problems...

 

I looked for the speed control servo and could not find it. Do you have a picture of it or anything to help me out. Thanks

 

Have you got b***er tires and or wheels than came stock on your truck?

 

The reason I ask that is when I put my 33x12.50's x17's on my truck I went to the dealer and had them reset my speedo. They said they didn't have that exact size in there programmer but their "guy" suggested they reset it as a 20" wheel. I forget the exact tire size. When they did that my cruize would cut off at 65. I went back and had them to reset the tire size to the b***est 17 they had in the programmer and now it works fine. My speedo if only off 1mph now.

 

I have 325/60r18 with a 3" lift. How much did the dealer charge you? 20's is what came on it. Also my speedo reads 5 mile faster than what i am really going. ( if it reads 45 im really going 40 ) Thanks

 

The first time only fourty bucks. When I went back for him to redo it he did it for free.

 

who ever set the speedo to the rim size is the b***est dumbass. If you have a 2" wheel on a 40" tire your speedo would be off like crazy. Set it to what ever the tire diameter is. Go somewhere else is they can't figure out how big a tire is.