We have a 2001 presidential 5th wheel it is hooked up and plugged and everything works but the lights. Is there a separate switch to turn these on?

Question edited for clarity.
Question moved from Cars and Trucks.

Various information here, but there are seldom manuals for 5th wheel trailers. The last link has specs and plan. You might try the forums.

https://www.google.com/search?q=2001+Komfort+5th+wheel+RV+manual

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Question edited to add maker name.
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Upping the cable by 20 amps is not the way to fix a power drain. Probably damage to the inverter unit

Wiring diagrams in the link. If you click on the All tab in the Google link, there is a video on how RV electrics work.

https://www.irv2.com/forums/f50/1982-holiday-rambler-presidential-32-wiring-schematic-492921.html


https://www.google.com/search?q=2005+presidential+5th+wheel+electrical+wiring+diagram&rlz=1C1QJDB_enCA643CA644&sxsrf=APq-WBuJcD4ICEbjyXL-VsAJBjy7zFb8Hg:1648605300744&tbm=isch&source=iu&ictx=1&vet=1&fir=KrKNJ6HiydzOqM%252Ca040EHa8677DXM%252C_%253BPKxF3hbLq-nFUM%252CPclodYzkeRuhQM%252C_%253B22DuNBhvFLw4hM%252CVjlk_so_xvU_DM%252C_%253BI8x4cqxHW7WtTM%252CTeTnAjxF6YF-IM%252C_%253Bu9-IU_9gaGeliM%252C8VmY7GTToPGslM%252C_%253BvfeA6ssBY0mUVM%252C7VB6oI2t8KHr_M%252C_%253BnIJVnekL5kPHVM%252C61T3T4fM8g9o2M%252C_%253B1tKtFF2B4V7GGM%252Ch_n7r6s8msFMqM%252C_%253BsXRI5gQpNYfJPM%252CnKk3NKLOOPwwrM%252C_%253BEwNSF8coq8os9M%252CWytUIwpciEyMGM%252C_&usg=AI4_-kQe_WLL2J8bkmQgOSMo-Lu-y4qYZg&sa=X&ved=2ahUKEwii78yq3ez2AhXDVc0KHSK1Cg4Q9QF6BAgCEAE#imgrc=PKxF3hbLq-nFUM

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If you have a 7-pin tow plug the brakes are activated with the blue wire,see diagram. If you have a brake controller

You’ll have to remove the coreplas protective barrier from the underside.

pipes to the water tank or cracked or rub holes in the tank from the straps

You need to get to the motor and see if there is power going to it in both directions. Does it sound like the motor is running but nothing moving?

All water flow is pushed by the water pump unless you are connected to a hydrant with a drinking water safe hose. Make sure all valves are set for water flow from the proper source. The water pump has a switch or two in the RV, usually near sinks or toilet. If the switch is on and no pump sound, check the fuse at the house 12v fuse panel (interior lights, furnace, refrigerator, etc.) If the fuse is O.K., it's either the pump or the pump controller. Amazon com Intellitec 00 00145 100 WATER PUMP CONTROLLER 10A Automotive

Test the pump by hooking it directly to 12v supply or use a test light to see if power is available at pump wires.

The light switch for the LED's on the front is under the 5th wheel area on the left / drivers side. The light switch for the LED strip on the lower r/h side is in the storage area right side and is a little black knob where the TV connection is.

Get on the computer and start your search engine or just open your home page on internet explorer. Type 2001 Montana 5th wheel owners manual, then press enter on your keyboard.....wah lah. Check the listed web sites for your manual. When found...attempt to download it or save the page on your computer.

Pull switch out and remove both wires from switch terminals. If light goes out, replace switch.