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

RV battery charge "feed"

Thread Tools
 
Search this Thread
 
Old May 30, 2007 | 01:40 AM
  #1  
coplin's Avatar
coplin
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 342
Likes: 0
From: British Columbia
RV battery charge "feed"

The feed on the 7pin RV plug-vehicle side. IS this feed from ur truck supposed to be 12volt always hot or 12volt switched.? and why? Thanks in advance
 
Reply
Old May 30, 2007 | 01:53 AM
  #2  
coplin's Avatar
coplin
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 342
Likes: 0
From: British Columbia
I just read the quote below from somewhere. I dont think i'll hook that charge wire up afterall.




I would not put a battery on you camper wiring pin or "between" your vehicle and camper for 2 reasons. 1. If the camper battery is severly discharged and you run your truck for a short time afterwards, the discharged battery can pull down your main battery more than the alternator can restore it until many miles are driven. Also, not good to have 2 batteries of different charge state on the same alternator at the same time. 2. There could be a very large current in excess of the vehicle harness capacity present if you drain the camper battery and then turn on the ignition to "mate up" the drained battery to a fully charged vehicle battery.

Best to just install a separate deep cycle in the camper and use a proper 120volt charger to maintain it at the campground.

If you are never on 120 at a camp ground and must use the vehicle to recharge it then you should use some sort of limiting device to avoid large current transfers between the vehicle and camper.
 
Reply
Old May 30, 2007 | 02:19 AM
  #3  
blackhat620's Avatar
blackhat620
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 11
From: Arizona
Originally Posted by coplin
The feed on the 7pin RV plug-vehicle side. IS this feed from ur truck supposed to be 12volt always hot or 12volt switched.? and why? Thanks in advance
This feed is "switched" so that you do not run the batteries down when the engine is off. It will run lights in the trailer and can slowly charge the trailer batteries, its main charging fuction is for the break-away brake battery. So hook it up to keep this battery fully charged. You can put a switch in the trailer if you don't want it to power anything else.

Hope this helps
 
Reply
Old May 31, 2007 | 12:11 AM
  #4  
coplin's Avatar
coplin
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 342
Likes: 0
From: British Columbia
Originally Posted by blackhat620
This feed is "switched" so that you do not run the batteries down when the engine is off. It will run lights in the trailer and can slowly charge the trailer batteries, its main charging fuction is for the break-away brake battery. So hook it up to keep this battery fully charged. You can put a switch in the trailer if you don't want it to power anything else.

Hope this helps
Helps a bit. But I've heard just run a 8-10 gauge wire form batt pos post with a automatic reset circuit breaker 20-30 amps. Thats fine but how do make this circuit switched, so that it only feeds when the key is in run position?
 
Reply
Old May 31, 2007 | 01:53 AM
  #5  
blackhat620's Avatar
blackhat620
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 11
From: Arizona
Originally Posted by coplin
Helps a bit. But I've heard just run a 8-10 gauge wire form batt pos post with a automatic reset circuit breaker 20-30 amps. Thats fine but how do make this circuit switched, so that it only feeds when the key is in run position?
Run your wire from the battery thru the circuit breaker then to a relay, out of the realy to the rear of the truck. Hook the coil part of the relay to any 12+ wire that is only hot with the key in the run position and use that to trigger the relay.
 
Reply
Old May 31, 2007 | 08:32 PM
  #6  
coplin's Avatar
coplin
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 342
Likes: 0
From: British Columbia
perfect thanks 620!
been a while since i've done auto wiring but its coming back to me now thanks to you.
 
Reply
Old May 31, 2007 | 11:59 PM
  #7  
blackhat620's Avatar
blackhat620
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 11
From: Arizona
Originally Posted by coplin
perfect thanks 620!
been a while since i've done auto wiring but its coming back to me now thanks to you.
Don't forget about the specific "Electrical" section of the forum down below. Franklin and the guys that hang out in there know there wire stuff and have some good diagrams
 
Reply
Old Jun 5, 2007 | 04:45 PM
  #8  
wick246's Avatar
wick246
Posting Guru
Joined: Feb 2002
Posts: 1,003
Likes: 0
I have a similar situation. My '79 F-250 was wired with an older brake controller and round 6 pin plug. I am replacing the controller with a new Prodigy and going to a 7 pin plug for my new travel trailer. If I install one 20 amp self re-setting breaker for the brake controller power, and another 20 amp breaker for the trailer charging circuit (will be relay switched), will these breakers be big enough to handle the likely load? I don't really have a concept of how many amps trailer brakes and battery draw. Thanks...
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

10 Ways Ford is LOSING to the Competition

 Joe Kucinski
story-1

Top 6 Best Deals Available on New Fords & Lincolns Right Now

 Brett Foote
story-2

This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

 Verdad Gallardo
story-3

Top 10 Fords at 2026 Carlisle Ford Nationals

 Joe Kucinski
story-4

3 Best / 3 Worst Parts of Modern Ford Ownership

 Brett Foote
story-5

10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

 Pouria Savadkouei
story-6

Every 2026 Ford Engine Explained

 Brett Foote
story-7

10 Ugly Ford Trucks That We Still Kinda Love

 Joe Kucinski
story-8

10 Things Every Truck Owner NEEDS (2026 Edition)

 Michael S. Palmer
story-9

Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

 Verdad Gallardo
Old Jun 5, 2007 | 06:04 PM
  #9  
blackhat620's Avatar
blackhat620
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 11
From: Arizona
Originally Posted by wick246
I have a similar situation. My '79 F-250 was wired with an older brake controller and round 6 pin plug. I am replacing the controller with a new Prodigy and going to a 7 pin plug for my new travel trailer. If I install one 20 amp self re-setting breaker for the brake controller power, and another 20 amp breaker for the trailer charging circuit (will be relay switched), will these breakers be big enough to handle the likely load? I don't really have a concept of how many amps trailer brakes and battery draw. Thanks...
A 20A breaker is good for up to 2-Axles with electric brakes.
A 30A breaker is good for up tp 4-Axles with electric brakes.

The 20A on trailer charging should be plenty as you are really only supposed to be charging the breakaway battery.

Hope this helps
 
Reply
Old Jun 5, 2007 | 08:16 PM
  #10  
wick246's Avatar
wick246
Posting Guru
Joined: Feb 2002
Posts: 1,003
Likes: 0
Originally Posted by blackhat620
A 20A breaker is good for up to 2-Axles with electric brakes.
A 30A breaker is good for up tp 4-Axles with electric brakes.

The 20A on trailer charging should be plenty as you are really only supposed to be charging the breakaway battery.

Hope this helps
Thanks blackhat.

If you wire it so that the truck doesn't charge the trailer batteries then what does??? No current bushes where I go.
 
Reply
Old Jun 5, 2007 | 10:34 PM
  #11  
blackhat620's Avatar
blackhat620
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 11
From: Arizona
Originally Posted by wick246
Thanks blackhat.

If you wire it so that the truck doesn't charge the trailer batteries then what does??? No current bushes where I go.
The 12V constant hot is mainly to keep the electric brake breakaway battery charged. It can also be use to turn on a light in the trailer for short periods of time and minimal charging of the trailer batteries. Problem with relying on the truck alternator to charge the Deep Cycle batteries in the trailer is that it was not designed for these heavy demands. You best bet to charge your Deep cycle batteries in the back country is to use a solar panel charger or a small generator like the Honda EU 1000i or 2000i.
www.hondapowerequipment.com/gensup.asp

Your trucks alternator will thank you.

See this recent thread on the subject.
http://www.ford-trucks.com/forums/61...altenator.html

Hope this helps
 
Reply
Old Jun 5, 2007 | 10:40 PM
  #12  
wick246's Avatar
wick246
Posting Guru
Joined: Feb 2002
Posts: 1,003
Likes: 0
That does help blackhat! I had found that thread and was just coming back to edit my post. I worked two Honda EU2000i's into my financing so I will have some options up in the hills. I don't remember if my Dutchmen has one battery or two, I pick up the trailer on Thursday. Still lots to learn...


Originally Posted by blackhat620
The 12V constant hot is mainly to keep the electric brake breakaway battery charged. It can also be use to turn on a light in the trailer for short periods of time and minimal charging of the trailer batteries. Problem with relying on the truck alternator to charge the Deep Cycle batteries in the trailer is that it was not designed for these heavy demands. You best bet to charge your Deep cycle batteries in the back country is to use a solar panel charger or a small generator like the Honda EU 1000i or 2000i.
www.hondapowerequipment.com/gensup.asp

Your trucks alternator will thank you.

See this recent thread on the subject.
http://www.ford-trucks.com/forums/61...altenator.html

Hope this helps
 
Reply
Old Jun 5, 2007 | 10:44 PM
  #13  
blackhat620's Avatar
blackhat620
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 11
From: Arizona
Originally Posted by wick246
That does help blackhat! I had found that thread and was just coming back to edit my post. I worked two Honda EU2000i's into my financing so I will have some options up in the hills. I don't remember if my Dutchmen has one battery or two, I pick up the trailer on Thursday. Still lots to learn...
Heck with two Honda EU2000i's and the kit to tie them together you will be able to run half the trailer park

If your trailer only has one battery think about adding a second Deep cycle battery to extend the time between recharges, then you won't have to run the generators as much.

Good luck and have fun.
 
Reply
Old Jun 6, 2007 | 12:28 AM
  #14  
coplin's Avatar
coplin
Thread Starter
|
Senior User
Joined: Jan 2004
Posts: 342
Likes: 0
From: British Columbia
While were on this topic:

Whats the difference between a generator/invertor and just a plain generator? I see these little hondas and other brands come in both flavours. More importantly which is best for an RV battery?
 
Reply
Old Jun 6, 2007 | 12:59 AM
  #15  
blackhat620's Avatar
blackhat620
Postmaster
Joined: Dec 2003
Posts: 4,196
Likes: 11
From: Arizona
Originally Posted by coplin
While were on this topic:

Whats the difference between a generator/invertor and just a plain generator? I see these little hondas and other brands come in both flavours. More importantly which is best for an RV battery?
Inverters in there strict form convert 12V DC to 120V AC to power lap tops, drills, etc.
//www.donrowe.com/inverters/inverter_faq.html

A generator/inverter such as on the Honda EU1000i/2000i series takes the power that is generated and cleans it up so that you have perfect sine wave AC power. Sine wave power is important for sensitive electronic equipment like computers etc. The Honda EU1000i/2000i generators also output 12V DC to charge batteries etc.
www.hondapowerequipment.com/inv.htm

Hope this helps
 
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
excavator
1994.5 - 1997 7.3L Power Stroke Diesel
4
Nov 8, 2014 06:11 AM
load hog
1987 - 1996 F150 & Larger F-Series Trucks
2
Apr 3, 2014 09:10 AM
pjhjah
1948 - 1956 F1, F100 & Larger F-Series Trucks
7
Oct 27, 2009 01:31 AM
sschroeder
Electrical Systems/Wiring
9
Sep 24, 2009 11:45 AM
jimexpedition99
1997 - 2006 Expedition & Navigator
1
Jun 12, 2006 07:01 PM




All times are GMT -5. The time now is 01:38 AM.

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