Troubleshooting Blown Fuses in your RV.
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- Опубликовано: 4 фев 2021
- In this video, we will use our RV's built in DC distribution system to troubleshoot blown fuses. We will also show how to differentiate a blown fuse and a bona-fide short by using a few simple devices.
Project/Review Webpage:
www.rv-project.com/repairs/fus...
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Great video!! I once owned an RV coach that would periodically blow the water heater 12vdc fuse. Then, for long periods, the replacement fuse would work just fine. Then just as suddenly the fuse would blow and trying to replace it, it was obvious there was a dead short on the 12vdc water heater circuit.
Anyway, it drove me crazy and I finally threw in the towel and took it to our repair guy and based on his years of experience he found the problem. The +12vdc wire was periodically coming into contact with a metal strut buried behind a wall and of course the fuse blew immediately, as it should. Many of these RV's are not made well, IMO.
You repair guys earn your keep!!
In my view, the state of today's RV industry is much worse than the low quality of the automotive industry in the mid-1970s.
All it is going to take is one player to provide a well-built RV, and the rest will be out of business overnight.
When doing our initial walk thru and PDI it became very apparent that the dealer's tech had no concept of how this panel actually worked. The electrical 12vdc and 120vac marriage that runs these rvs is not something most of us have had prior experience with and can be confusing in the beginning. Even your simple diagram of the battery/charger/distribution board is most helpful. Please continue!
it doesn't help how they are manufacturered two of the same RVs can actually we wired differently depending on the "electrician" on that day. I converted my 30 amp RV to a 50 amp system and I needed to pause and figure out several times to figure out what the heck the manufacturer did especially on the DC side.
Thank you for your support of the channel.
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This was awesome! The manipulatives (instructional tools) were good for demonstrating scenarios of shorts, but I did find it hard to follow with the wiring that was used to simulate the shorts instead of the actual hardware. Nonetheless, excellent visuals, particularly the diagrams that were actionable!! Thank you
Since the wiring varies in each RV, it's hard to come up with something that will apply in each situation. since the fuse board came out of a RV and is fairly common, I decided to use that as the focus point.
Really helpful. Thanks. I have a 12 volt lighting circuit combined withy USB ports (apparently, as neither works) that has failed. Going to use my new knowledge to troubleshoot the fuse board. If that fails, I will take it back to the repair shop that fixed the ceiling A/C ducts over the past winter. Duct damage due to critters (mice). It is possible they also damaged the wiring, or that something happened during the repair. Great video, especially combined with the ATM/ATC/ATO video. Thirty minute crash course in 12 volt RV systems. Nice.
Thanks for watching. Be sure to check out my other RV technology series videos.
this is great video explaining the short and blown fuse. do you make those testers? I would definitely buy them if you do.
Let me know
Thanks, this helps in my troubleshooting. I have my furnace/water heater circuit that is blowing fuses and I can't figure out why.
Glad it helped
Hi,
I have a small travel trailer with a WFCO 8735. After a days towing, the same fuse #5; 15 amps is always blown. Once I replace the fuse and hookup to shore power, the fuse will not blow again (til towed).
The red led light on the WFCO is on. The circuits on this is a control panel (with rocker swtiches for lights, fan, toilet pump, and CO monitor. Everything on this circuit is off when towing
.
Can you give some suggestions of where to look for the short
Thank you
👍🏻
Thanks for the explanations on the fuses. I have a WFCO 8955 in my Outback and I was having troubles with it charging the batteries when plugged into my generator. I found that one of the 40A fuses was blown, so I'm hoping this was the cause. Do you know why there are two 40A fuses, they both seem to be hooked up to the same items?
My test WFCO panel is the same. The only reason I can think of is that the maximum fuse size for an ATC/ATO fuse is 40A and they needed more. However, it seems to me that using two fuses would not be as reliable as using an 80A Maxi fuse.
@@RVProject I was also thinking that it may have been for a backup in case one fuse blew, there would be another to keep you going. I also found that the female socket that second fuse plug into wasn't tight, so it would cut in and out when charging the battery causing it to take a lot longer than it should have to charge. Electricity is such a finicky thing.
The two 40 amp fuses provide reverse connection protection to the converter should the battery be connected backwards. These are DC fuses and would be on the DC side of the converter. If 1 or both 40 amp fuses are blowing with the battery correctly connected, that could be indicative of a possible converter issue.
Why would the levelers and slide out be wired directly to the battery? I noticed that when my built in battery on off switch is in the off position that the levelers still have power.
This is typical. Levelers and slides take a lot of amperage, so they often wire directly to the battery to prevent voltage drop issues.
Look at this could help us our rev is stuck in park by an blown fuse
Hopefully it helps.
Why dose my water pump fuse keep blowing
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