Red91XJ

1991 XJ, automatic, supposedly w/cruise control...completely inop...

My XJ has no indicator light on the dash/instrument cluster.

I've checked fuses, tested relays, the connection to the solenoid; throttle linkage seems fine, brake light switch is fine, vacuum lines are fine...how do I go about testing the other components of the cruise control system (module, wheel and vehicle speed sensors, etc)
If you figured it out, I would love to know what you did in your case ...please

90xj,99xj,92mj

dude i posted a thread for my jeep, still cant figure it out! hey there is two switches on the brake pedal, a black one with 4 wires comin out of it and a whit one with 2 wires and a vacuum line. what are these?

Red91XJ

I read your post about your cruise...I have one switch on my brake pedal; the black one, which is the brake light switch. The cruise control module needs to see that this switch is functioning in order to allow the cruise to engage, since stepping on the brake pedal disengages it. If you have brake lights, this switch is fine. Can you post a picture so I can see the other white switch and vac line you were talking about? The only part of the brake system I know of that is involved w/the cruise control system is the brake light switch.

90xj,99xj,92mj

i dont have a pic right now but i'll try and ****** one tomorrow before work, its about3 or 4 in higher up the brake pedal its white and it has a little piston that comes out of it, also is it normal that i can take my xj out of park without touching the brake pedal. i theought there was some kind of safety thing to where you had to be pushin on the brake pedal to take it out of park

Red91XJ

In 1996 a recall was issued to install a brake pedal interlock that requires the driver to depress the brake pedal in order to shift out of park...you can go to jeep.com and search for open recalls by VIN...I bet your Jeep never got the interlock. I say this because one of the first things I did after buying my oldie was to look for open recalls, and the brake shift interlock was one of them. So, yes, normal for your model year, but there is a FREE fix.

90xj,99xj,92mj

ha awesome i just didnt know if maybe that had something to do with the cruise. i think im gonna overhaul my entire system before i get the dumb thing to work. the only thin i have not replaced is the actual motor which worked on the test drive! i dunno ha its a jeep thing

Red91XJ

I don't think the shift interlock has anything to do w the cruise...my cruise didn't work before I had the interlock put on, and still doesn't work after.

90xj,99xj,92mj

alright, i'll try and get a pic of that switch for you tomorrow if i have time

Red91XJ

mucho appreciado

90xj,99xj,92mj

this is the best pic i can get. its got the plug on the side with 2 wires and the vacuum line on the back

90xj,99xj,92mj

maybe someone else can tell is what this switch does? im stumped

Inflames

Bad clock spring? Thats whats wrong with mine.

90xj,99xj,92mj

ya thats in the 97 and newer i believe, i had to replace that in my 99

Gryphon439

Check the wire coming out of your turn-signal/cruise control switch. Mine hadd chaffed on the plastic housing and severed a wire where is goes into the steering column. Hope this helps.