EPDM Coatings
rvupgradestore.com Composet Products PO Box Zone
Over The Network Custom Yacht Interiors

Author Topic: Can we charge TC battery with 7-way?  (Read 12447 times)

OTRA

  • Posts: 4
Can we charge TC battery with 7-way?
« on: June 09, 2012, 08:57:12 AM »
We have a 2008 Travel Lite TC and an F 150 with heavy-duty suspension and it works great.  We have never connected the camper battery to the truck battery to charge while driving.  Is there a way to do that?  Can we use the 7-way? 

THANKS!

skyking1

  • ---
  • Posts: 833
Re: Can we charge TC battery with 7-way?
« Reply #1 on: June 09, 2012, 09:13:17 AM »
Yes, look up the standard for 7 way plugs and one lead is power from the TV.  Here is a link.
http://www.etrailer.com/faq-wiring.aspx
Your trailer is probably already wired right. Your truck is already probably wired right.
Check with a multimeter on the trailer plug. It should show 12 volts with the battery hooked up there.
Check with a multimeter on the truck jack. It should show 12 volts there with key on.
If the truck does not have power, check to see that lead is connected in the plug, and that it has a fuse or breaker, and it is not blown.

« Last Edit: June 09, 2012, 09:15:17 AM by skyking1 »
Kelly and Mary

1996 Dodge CTD 2500 "Woody"
1991 Avion 29.5 ST
Washington State

http://boondockerswelcome.com/users/skyking

OTRA

  • Posts: 4
Re: Can we charge TC battery with 7-way?
« Reply #2 on: June 09, 2012, 11:05:54 AM »
Thank you for your reply.  I don not understand how to hook the 7 pin to the camper battery...  The wiring diagram showed which blade I need to connect to.  Should I take the cover off the plug and hook a wire to the proper screw and then to the battery?

PancakeBill

  • ---
  • Posts: 5037
  • Bill & Jolene/USA 97 Southwind 35P
    • WorKamping in Yellowstone
Re: Can we charge TC battery with 7-way?
« Reply #3 on: June 09, 2012, 11:08:17 AM »
Near your battery storage there is likely a schematic and fuse pane,  there ought to be a clue there.

Bill & Jolene W & Koda

Old Faithful, Yellowstone Association Bookstore
1997 Southwind 35P
Toads: 1997 Honda Accord & 1986 Westfalia
FMCA F-401354
1995 OMI Dobro F-60
WA1RI

skyking1

  • ---
  • Posts: 833
Re: Can we charge TC battery with 7-way?
« Reply #4 on: June 09, 2012, 12:20:15 PM »
If the 7 pin plug was wired right, it is done. just check that pin for 12 volts now with your battery connected to the trailer normally.
If it was not wired right then you may have to open up the plug to fix that.
Then check the truck jack with key on.
Kelly and Mary

1996 Dodge CTD 2500 "Woody"
1991 Avion 29.5 ST
Washington State

http://boondockerswelcome.com/users/skyking

boatbuilder

  • ---
  • Posts: 1116
Re: Can we charge TC battery with 7-way?
« Reply #5 on: June 09, 2012, 12:37:00 PM »
I don't know if Ford's are the same but GM products have the wire hooked up at the 7 pin but the end at the fuse block under the hood is not hooked up.  You have to cut it loose and put the eye on a stud on the fuse block and install a fuse.  Hope this helps some.  There are also a couple good forums for Ford and GM pickups that show this stuff.
Charlie

OTRA

  • Posts: 4
Re: Can we charge TC battery with 7-way?
« Reply #6 on: June 09, 2012, 01:22:17 PM »
Thanks to all for the suggestions.

Rickincharlotte

  • Posts: 1
Re: Can we charge TC battery with 7-way?
« Reply #7 on: July 30, 2012, 12:55:47 PM »
I charge my battery while driving around sight seeing using a seven pin plug. I attached a hot wire and a ground
wire to the plug and secure the battery in the bed of the truck.
My question is about over charging using this method.
Will the truck alternator regulate the charge or will the charge on the battery slow down the charge as the battery reaches 80%?

Jammer

  • ---
  • Posts: 1491
  • Moar Aluminuminum!
Re: Can we charge TC battery with 7-way?
« Reply #8 on: July 30, 2012, 01:09:37 PM »
Rick

The truck alternator is regulated so overcharging isn't ordinarily a problem.  In practice because of the wire sizes and lengths the TC battery tends to charge somewhat more slowly than we might like.
2004 Suburban 2500 4wd 8.1 / 2010 Airstream Classic 30' /
1997 K2500 regular cab long bed pickup / 1971 Cayo C-11

elkhornsun

  • ---
  • Posts: 20
Re: Can we charge TC battery with 7-way?
« Reply #9 on: August 17, 2012, 12:30:49 AM »
For the charge line you will want to run 8ga wire to the battery and have a 40amp fuse and an isolator wired in line. The isolator keeps the camper from draining the battery of the truck when the engine is not running which is important.

Lou Schneider

  • Forum Staff
  • ---
  • *
  • Posts: 7312
Re: Can we charge TC battery with 7-way?
« Reply #10 on: September 28, 2012, 03:25:59 PM »
Or just unplug the camper from the truck when you stop for the night, then plug it back in when you leave in the morning.

lavarock1210

  • ---
  • Posts: 371
Re: Can we charge TC battery with 7-way?
« Reply #11 on: September 28, 2012, 06:28:25 PM »
An easy way to check if things are wired correct.  Unplug the 7 way.  Measure voltage at the trailer battery.  Now connect the 7 way and start the Truck/TV engine.  If the voltage increases then things are probably wired correct.  If the voltage does not increase then there is a wiring problem or a fuse missing. 

Jammer

  • ---
  • Posts: 1491
  • Moar Aluminuminum!
Re: Can we charge TC battery with 7-way?
« Reply #12 on: October 03, 2012, 04:45:38 PM »
We all have our methods.  I have two batteries in the truck, separated by an isolator relay.  One is connected to the 7-way.  It adds more battery capacity, and since I don't have room in my TC for another battery, that helps.
2004 Suburban 2500 4wd 8.1 / 2010 Airstream Classic 30' /
1997 K2500 regular cab long bed pickup / 1971 Cayo C-11

RickRv

  • ---
  • Posts: 11
Re: Can we charge TC battery with 7-way?
« Reply #13 on: October 04, 2012, 10:41:43 AM »
A week or so ago when I bought my new Northstar TC800, the guy at the RV center stated that Tundras and Fords (when using a dealer-installed 7-way Trailer connection) are wired so that all you have to do is plug in the 7-way coming from the TC (my Northstar already had a 7-way connector, but I don't know if this was dealer installed or came this way from the factory) and this would charge the RV battery whenever the truck was running.

I hope this helps.

RickRV

infinitefoamies

  • ---
  • Posts: 40
  • Self Certified Know it all
Re: Can we charge TC battery with 7-way?
« Reply #14 on: November 26, 2012, 11:15:41 PM »
I have two of these: http://www.etrailer.com/Wiring/Pollak/PK11851.html
Can handle a much higher amperage. It is probably better if both batteries are of the same capacity and MUST be of the same voltage. (seems obvious but you'd be surprised what I've seen)
89' winner escape "The Germinator"
89' F350 XLT 7.3l Diesel "?"
88' F350 XLT Lariat 7.3L turbo Diesel "Carlynda"
86' Sunline TC "?"
81' Tartan 3000 "Whimbrel"
75' Lugar kit "?"
73' MGB GT "Veronika"

lavarock1210

  • ---
  • Posts: 371
Re: Can we charge TC battery with 7-way?
« Reply #15 on: November 27, 2012, 10:10:36 AM »
Here is a simple way to see if your system is already connected.  With trailer connected and the truck engine off check the voltage at the trailer battery terminals.  It should read about 12.6 volts.  Now start the truck engine.  Wait a couple minutes then check the voltage at the same place that is the trailer battery terminals.  It should read higher than it did before (13.0 or greater) you started the engine.  If it does you are all connected correctly.  I have found due to the long wire distance this does not do very well in charging a discharged trailer battery.  But it will keep a charged battery at peak charge while towing.

bucks2

  • Guest
Re: Can we charge TC battery with 7-way?
« Reply #16 on: November 27, 2012, 11:27:05 AM »
Just a sidelight to the discussion, some MH's have power already routed to the 7 pin connector. (black wire, 1 o'clock position) This can be used for charging a toad etc. Sometimes, people fail to put a diode (one way electrical valve) in the circuit when they wire up to their toad battery. Without the diode, the 12 volt power from the toad battery can flow back into the MH and on certain makes/models it will allow the engine to keep running despite turning off the key! Monaco brand MH's specifically will do this, others may.

So, if you wire up your new toad and then can't turn off the engine of the MH, now you know why.

Ken

 

Hosted by Over The Network