1988 jeep cherokee

being a 95 locate cruise control unit under hood & check for broking vacume hose
and replace make sure fuse is active

there aretwo fuse panels in this model car, One is under the hood on the right side ( passanger side) And the other is under the dash on the drivers side.

Check the vacuum hoses it is easy to notice if one is missing or not. If that doesn't work, I'd try the cruise control switch. Hope this helps

try the brake switch located behind the brake pedal....had similar problem and this fixed it

You are looking more so for relays, not fuses, check the hand book again under relays.

Check this out also...the schematic is too small to see which fuse it is in the engine compartment Power Distribution Center (the fuse box). Is your cruise control not working?

Cruise Control The Cruise Command system is electrically actuated and vacuum operated. The turn signal lever on the steering column incorporates a slide switch which has three positions OFF, ON or RESUME. A SET button is located in the end of the lever. This device is designed to operate at speeds above approximately 35 mph (56 km/h).
The speed control module automatically controls throttle position to maintain a speed set by the operator. The vehicle will keep the set speed unless the driver presses the brake, clutch or accelerator pedal.


Exploded view of the cruise control switch and related components



vehicle speed sensor location

According to my wiring diagram there is no dedicated fuse for cruise.The cruis is tied into the powertrain control module.

Review this information about Jeep-WJ-Cherokee-Service-Manual-PDF-08W-Diagrama-de-Cableado (Wiring Diagrams / Section 8W Page 181 (8W 33-1)

Is in spanish, but the graphics can help you.

Good luck!!!

check your vacuum hoses to the servo