1998 Lincoln Navigator

Depends on what kind of slide it is. A pic would be helpful

While researching your model, it looks like the panel you need to look for is down right of the bathroom sink. When you open it, keep in mind that the AC & DC circuits are in there. DC has fuse and AC has breakers. Hopefully they are labeled for you to make locating the ones you are looking for easier. Can you pull each fuse to check or is a multimeter to see if you have the 12-13.8VDC on each side of the fuse. Remember there voltage is hot even with shore power disconnected. To remove the voltage, you need to turn off (open) the Main Battery Disconnect. Typically, these are located in the storage compartment area or near the location of the batteries. Just look for a bit red switch or lever. If you find the fuse are good, check your battery voltages. Anything less than 11.8VDC could be your problem. If less, charge the batteries with a trickle charger or put into shore power.

Many of these are located under the OHC (over head cabinet) around the center of the area. I have seen where some are flush it sunken under, some are just on the surface itself. Generally, heaters will use the thermostat located in the main living area, dining room table or couch and it should be at should height or higher. Since heat rises, more ideal and energy conservative. Use a good flashlight, being specific for corners and tight spaces.
Most sub surface or flush sensors will be smaller but usually have a similar size sensor, around 8-10 mm or 3/8" so these are smaller than what I am showing you in the picture, in which the sensor is located in the middle of this type.

If you think you may have found it but not sure, a trick to try is using a hair dryer on the area while another person observers the thermostat to look for temperature changes. Easy to watch on digital, need to remove cover and observe the level or bar movement when heated.

For your unit having only the L/M/H switch, the sensor may be around the location of the switch or in close proximity to the heat output

Is it a P30 chassis with the auto park brake? If so, there would be what looks like a brake drum where the driveshaft goes into the transmission. That brake is always applied until the motor is running and then is hydraulically held in the release position. The mechanism is integral with the foot brake but even with the foot brake off it will stay engaged. Under the driver seat area underneath the coach is the mechanism. If this is the problem you need to figure out how to release that brake. If you can find a way to pull the cable against the spring tension and hold it there (clamp it somehow) it will free up the system. Of course if you already have the transmission disconnected from the motor then disregard all this and assume i misunderstood the problem.

Look at the replacement bulb. If it has prongs on the bottom without a socket around the prongs, it should just pull off. That motorhome has Lincoln LS headlights borrowed from Lincoln. From what it looks like on the replacement bulbs, they are a twistlock with a plastic groove around the outside of the housing. The trick is there is usually a retaining spring lever you have to push to release the rotation.

Your unit may have come with a video control center or distribution box for cable, antennae and TVs. This would be in the entertainment center area with the cables connected in the back. On the front, you will have several selector switches or buttons (newer style digital or or analog) for the outputs. If you disconnect the "Main In" cable and ohm it out to ground through the cable input connection, use the speaker option if available and listen for the tone. If you do not get any, rotate through all of the cables coming from the wall. If none are getting tone, it is quite possible that the cable was bent, pinch of severed to prevent the signal from coming in. This is a 2017 and should be covered under warranty so have the place you bought it fix the cable or install a new cable.

PDF]RBD Owners Manual (PDF) - Recreation by Design

www.recreationbydesign.us/downloads/RBD_owners_manual.pdf

Also, please review all component manufacturer's owners manuals ... Call our factory and obtain authorization for repairs BEFORE attempting the repair yourself ...... If thefifth wheel is hitched up with the front too high, too much weight will be.

Owner's Manual - Keystone RV

www.keystonerv.com/customer-service/owners-manual

Download the Keystone Owners Manual Revision 4/01/2015 · Download the KeystoneOwners Manual Revision 4/1/14 · Download the Keystone Owners ...

2009 luxury by design 5th wheel rv owners manual - Fixya

www.fixya.com/.../t26003542-2009_luxury_design_5th_wheel_rv_own...

5 hours ago - I have been told it is the circuit board. Can I replace this part myself. Thermostat is Duo-Therm by Domestic. In 1998 Aljo RV 5th wheel. Appears ...

Luxury By Design Travel Trailers - PPL Motor Homes

Look for a short plastic water line protruding under with a cap or tap on it. Should be roughly in line with Potable fill inlet. Get right under and look around frame area as well. Locate pump and look in that area as well.

The trailer A-Frame tongue is the first place to check. Look for a ID plate affixed to the frame near the coupler. If the ID plate isn't evident there, check the front storage compartment and look over any exposed frame members in that area. On some travel trailers, The ID plate is actually inside the trailer, inside a storage cabinet.

weak batteries can cause this; check or, replace them look for a long crank handle it should be in the front cargo hold the crank goes into the area just below where the slider ram is located then rotate the crank by hand to move the slider manually in or, out