Kitchen slide will only go out 7 inches. it stops. it retracts ok but only goes out 7 inches and stops. are the cables suspose to be slack

possibly something obstructing slide travel has lodged on one edge. suggest open it again, and check that. lubricate the mechanism.

The question doesn't have a lot of detail -- model of RV, which slide out if more than one, what kind of cable?

Generally, if it is a power cable, disconnect from shore power and disconnect both the cabin battery(ies) and the engine battery(ies). Find the end of the cable (fuse panel, switch) and disconnect unless there is a junction or connector that is easier to access. Carefully unmount any cable ties or holds/clamps to free the cable. Reroute to your preferred location, clamp in place. Things to consider: is rerouting necessary? Will there be enough slack in the cable to operate when the slide out is extended, or doesn't k*1*n*k, pinch or droop below the chassis when slide out is retracted. Any sharp corners or wear points it will rub against? If replacing with a new cable, is the cable suitable for exterior environments if it is outside/underneath -- and if it is power, is it sufficient gauge for the power running through it?

You can probably see why it's hard to answer your question -- many variables and unknowns. Can't believe k*1*n*k is a naughty word on this forum.

Warranty? Call your dealer service dept - your salesman has already forgotten your name!

Contact your local retailer directly or online here: https://www.holidayrambler.com/contact

possibly gear arm is bent. slide outs are not made to be sat and lived in. you should be able manually slide it in. try to lift slide out by the arm with a hydraulic jack. place jack on ground use a 2x4 or 4x4 between jack and gear arm and lift gently. the teeth on arm could be stripped also. just ease into it..

check for correct wiring for the leveling system as it appears that some one has wired the system wrong

are you saying it clicks the whole time while it is retracting?

check that both sides are moving evenly
from your statement only one side is moving and twisting the slides causing it to jam
if the action are screw threads , then it is possible that one side is not driving ( limit switch problem, no power etc)
If it is hydraulic check the ram operation on that side
(pin fallen out at end of ram)

I had this problem several years ago.
Problem can occur at least three ways:
1. Most likely, something is in the way. A displaced trim molding, the rubber seal has moved, or ? With the slide only slightly extended, using a flashlight and mirror, examine every part of the seal/body junction inside and out that you can. A straightened coathanger can help remove a foreign object.
2. The slide might be binding. The motor would hang, draw excessive current, and shut down. Testing this would involve manual slide extension. Not familiar with Keystone, but typically, you run it out with a crank. The crank location is a round opening under slide. Depending on length of slide, there may be two. If two, they must be actuated together, or each one alternately, a little at a time. On some brands, the gear train between actuator motor and slide MUST be disengaged to allow manual extension/retraction, it depends on how the manual extension works. Hopefully you have a manual that can explain the procedure. The crank(s) to extend/retract are usually stored in the bay(s).
3. The motor has weakened. This is unlikely, if the problem is just the last inch or so.

Good luck!

Is this the system with the cables on the side? If so, they should, via a system of pulleys, be routed to the top of the slide on the inside of the coach. There you will see a few adjustment points. Before you do that, have you lubed the slide seals? If not, use 100% silicone spray and lube the seals good. The seals can get tacky and grab the slide making it jump when in motion. You will also want to mark the adjustment bolt before making any adjustments just incase you need to go back to the original setting.