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03-07-2020, 04:09 PM
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#1
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Senior Member
Join Date: Nov 2017
Posts: 104
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Spare fuse?
I was looking over my 2018 Microlight 21DS, prepping for an upcoming trip. I took off the electrical panel cover to make sure all the connections were tight and everything looked good. However, when I removed the panel, there was a 15 amp blade fuse laying on the floor. I also noticed there is one empty fuse location at F11.
Is it a spare fuse or does it go in F11? Anyone know what F11 controls? I have a WFCO 8900 panel. The 21DS is still winterized and I didn't power it up to see what isn't working. I don't know how long the fuse was on the floor, but last year we didn't notice anything not working.
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2020 RAM 1500
2024 MiniLite 2515s
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03-07-2020, 04:13 PM
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#2
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Senior Member
Join Date: Jun 2012
Location: Southern NM
Posts: 9,563
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I have yet to see the same model of any RV wired exactly the same. I'd just wait and see if everything works. If not, then you know where it goes.
If you really want more info, take the panel out and see if there is anything attached to that fuse slot.
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Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD Duramax
Reese Fifth Airborne Sidewinder
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03-07-2020, 04:15 PM
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#3
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Site Team
Join Date: Jan 2007
Location: Goodyear, Arizona
Posts: 33,845
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What does the fuse panel door sticker say? Should have all the fuse locations labeled.
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Dan-Retired California Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.) 
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity
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03-07-2020, 04:17 PM
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#4
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Kanadian Kamper
Join Date: Sep 2010
Location: Southern Ontario
Posts: 8,185
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It takes a lot of time.....but on a crummy day, I pulled fuses to see what’s wired to what, and made my own legend to label things.
Several homes we bought apparently suffered the same problem of no one ever marking things down on the panel.
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Ken and Terry
2018 Sunseeker 2430S-CD, nicely modified and carried by a 2017 Ford E450 Sport
Former Georgetown 330TS owner for 10 years with more mods than I can count, pushed by our 2017 GMC Terrain
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03-07-2020, 04:24 PM
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#5
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,359
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On a WFCO power center the bottom two, #10 and #11 fuse positions are for higher current accessories (30 amp). On mine the tank heater was connected to #10 and #11 was empty (no fuse).
Is there a red light that stays on next to this fuse position? If not there's probably nothing connected to the terminal next to it. To make sure you'll need to remove the cover (two screws inside the access panel near the top) and just look to see if there's anything connected.
It's not unusual for a fuse to be left inside the power center if it's previously owned as the other owner may have had some issues and wanted to have a ready spare.
The 15 amp fuse wouldn't be for the tank heaters as they're most likely fused with a 30 amp fuse.
On my WFCO panel there is no fuse position #9. Merely a gap between #8 and #10 and a note that #10 and #11 are reserved for the higher current fuses.
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"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change  )
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03-07-2020, 04:26 PM
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#6
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,359
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Quote:
Originally Posted by bikendan
What does the fuse panel door sticker say? Should have all the fuse locations identified.
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Assuming you can read the installer's shorthand  
__________________
"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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03-07-2020, 04:27 PM
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#7
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Senior Member
Join Date: Nov 2017
Posts: 104
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Quote:
Originally Posted by bikendan
What does the fuse panel door sticker say? Should have all the fuse locations identified.
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I checked the sticker but nothing is labeled. When I looked at the panel last Spring I don't remember seeing the fuse on the floor. All the other fuses are in tight. I'll have to power up the RV tomorrow and see if something's not working. Thanks everyone.
__________________
2020 RAM 1500
2024 MiniLite 2515s
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03-07-2020, 07:37 PM
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#8
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Senior Member
Join Date: Feb 2020
Location: Northern Foothils CA
Posts: 1,426
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Good idea to have a number of spare fuses. Harbor freight has them very reasonably priced. Good luck.
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03-07-2020, 07:58 PM
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#9
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Senior Member
Join Date: Jul 2017
Location: California
Posts: 7,616
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Take the complete cover off and see if there are any wires installed for that fuse slot.
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03-08-2020, 09:31 AM
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#10
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Senior Member
Join Date: Nov 2017
Posts: 104
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Quote:
Originally Posted by babock
Take the complete cover off and see if there are any wires installed for that fuse slot.
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Good idea. I'll do that today and see if anything is connected. Thanks
__________________
2020 RAM 1500
2024 MiniLite 2515s
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