My cruise control will not engage, and it the vehicle had this issue when purchased. The cruise light will turn on and stay on, but it will never engage. I would appreciate any suggestions.

 

check the connections leading into the cruise servo, i dont have a service manual for your truck so im not sure where it is, im not sure if there is a vacum line on the cruise system for these trucks or not, but check for cracked or open vacum lines too


btw, i hope you did not buy the truck new

 

+1 Sharps!

 

Is the cruise servo the same as the speed servo? If so I checked the vacuum from the engine to the speed servo and it was fine. I then removed the cowl plenum to check the vacuum reservoir and one way check valve. Both items check fine. Did I just narrow it down to something in the brakes?

 

it COULD be a bad break light switch, causing the cruise to kick off immediately, but i would expect you to have brake lights on all the time if that were the case

 

I would replace the $10 dollar brake switch.

 

Thanks for the help guys, the $16 brake switch from NAPA did the job.

 

Thanks for the update!