Notices
All Things Towing Conventional, 5th Wheel, Toy Hauler, Flatbed, Gooseneck, Electrical/Brakes/etc.

blowing fuses

Thread Tools
 
Search this Thread
 
Old Jun 21, 2011 | 04:52 PM
  #1  
tonym1069's Avatar
tonym1069
Thread Starter
|
New User
Joined: Apr 2011
Posts: 4
Likes: 0
blowing fuses

Hello all,

In my fifth wheel on the main fuses panel, I have two 30 amp fuses. Both continue to blow. I see vag refernces to the rectifier, but have not been able to find any shorts or grounds. I do not have a lot of knowledge on trailers, or there wiring. I but this trailer as a salvaged unit. So not much info came with it. Would like all the help I can get. If anyone knows any links to other sites or any good books to get, please tell me.
 
Reply
Old Jun 21, 2011 | 07:19 PM
  #2  
RV_Tech's Avatar
RV_Tech
Hotshot
Joined: Jan 2010
Posts: 10,060
Likes: 491
From: Bristol, TN.
Originally Posted by tonym1069
Hello all,

In my fifth wheel on the main fuses panel, I have two 30 amp fuses. Both continue to blow. I see vag refernces to the rectifier, but have not been able to find any shorts or grounds. I do not have a lot of knowledge on trailers, or there wiring. I but this trailer as a salvaged unit. So not much info came with it. Would like all the help I can get. If anyone knows any links to other sites or any good books to get, please tell me.
Okay, so to be sure I am on the same page, you are talking about the fuses in your converter panel and you are referencing the two fuses that are for polarity protection i.e. in the event the battery terminals are hooked up incorrectly the board in the converter won't turn to smoke. What converter do you have i.e. make and model number please.

Steve
 
Reply
Old Jun 22, 2011 | 07:19 AM
  #3  
senix's Avatar
senix
Super Moderator
15 Year Member
Liked
Loved
Top Answer: 1
Joined: Aug 2008
Posts: 37,384
Likes: 1,868
From: Frederick, MD
Club FTE Gold Member
subscribing!

Steve, maybe the battery terminals/wiring are reversed?
 
Reply
Old Jun 22, 2011 | 04:48 PM
  #4  
RV_Tech's Avatar
RV_Tech
Hotshot
Joined: Jan 2010
Posts: 10,060
Likes: 491
From: Bristol, TN.
Originally Posted by senix
subscribing!

Steve, maybe the battery terminals/wiring are reversed?
Possibly. I always start there as the most common route to blown polarity fuses is from the battery side.

The points of consideration are any place the power to the converter on the dc end might be reversed and then the board.

For older model and smaller converter the fuses will be 30 amp, but most of the newer converters now use two 40 amp fuses. The polarity protection fuses are the ones in the converter that do not have visible leads to the them like the appliance fuses do. Really old converters do not have this protection.

Steve
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Culvert
6.0L Power Stroke Diesel
17
Nov 10, 2016 09:31 AM
misterbill11
Excursion - King of SUVs
7
Oct 16, 2014 03:47 PM
rb8484
Excursion - King of SUVs
7
Aug 18, 2011 11:01 PM
72soa
2007 - 2014 Expedition & Navigator
2
Oct 23, 2007 04:23 PM
Skottt
Electrical Systems/Wiring
4
Dec 28, 2001 11:22 AM




All times are GMT -5. The time now is 12:22 PM.

story-0
10 Ways Ford is LOSING to the Competition

Slideshow: 10 ways Ford is losing to the competition

By Joe Kucinski | 2026-06-15 09:52:01


VIEW MORE
story-1
Top 6 Best Deals Available on New Fords & Lincolns Right Now

Some great targets in today's expensive world.

By Brett Foote | 2026-06-15 09:35:19


VIEW MORE
story-2
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-3
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-4
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-5
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-6
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-7
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-8
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-9
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE