Cruise Control Not Engaging

[rrb6699]

I'm not sure if it's the button controls or connections, etc.
when I turn it on I get the green light on the button on the steering wheel but nothing else happens when I try to engage it.
I've never debugged one of these.

not that it should matter but, its a 1996 dodge ram 1500 5.2l.

rr

 

[SYKRAMMAN]

Probably the servo under battery tray. Or wheel speed sensor.

 

[rrb6699]

ф
ahh which wheel?
never knew about under batt tray. iIthere a way to test it?

if it's the right wheel well, we'll, that's the fender that was all smashed up when iI Ibought the truck. what does the speed sensor look like?

rr

 

[dapepper9]

I would start with vacuum leaks. The servo runs off vacuum and ive only ever seen 1 fail

 

[rrb6699]

I'll follow it back from under the battery i guess.

what about the speed sensor? same one used for speedometer? speedometer seems to be working OK.