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02-26-2017, 08:23 AM
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#1
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Junior Member
Join Date: Jun 2016
Location: Melbourne, fl
Posts: 15
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Charging Dinghy Battery from 7-pin RV Connector
Is the 7-pin connector on the back of my 2007 Fleetwood Bounder wired and fused to be to connected to a battery charger that is located under the hood of the towed car? The charger is rated to put out 15 amps charging current if the weak car battery demands it.
If so, what pin on the 7-pin RV connector is freed up to do this when connected to the towed vehicle tail lights? What fuse is on this line?
If not, does anyone have a better idea for keeping the towed vehicle battery charged since the Jeep Cherokee steering control will be on and drawing current from the car battery while towing?
Thanks for any help provided.
Paul
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02-26-2017, 09:19 AM
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#2
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Senior Member
Join Date: May 2013
Location: Ontario, California
Posts: 2,429
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If you look inside the female trailer plug connector attached to the rear of your coach, the pin that's at the 1:00 o'clock position should have a constant 12 volt DC supply from your batteries. If you put a charger inside your car, it will probably be 120 volts AC and won't work.
The easiest way is to convert from a 4 pin connector on your car to a 5 pin connector. After all the lights have been hooked up to that connector, you'll have an extra pin. Attach a 10 gauge wire to that pin and to the Positive + side of your car's battery. Everytime you plug in, it will be getting voltage from the coach thus, keeping the cars battery charged.
__________________
[SIGPIC][/SIGPIC]2016 Newmar Dutch Star 4369
Newmar Owners Club
USAF 1966-1969,- Law Enforcement 1969 - 2003, Retired since March 2003
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02-26-2017, 09:20 AM
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#3
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Senior Member
Alpine Owners Club
Join Date: Jun 2007
Location: Lake Wales, FL
Posts: 3,113
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Charging Dinghy Battery from 7-pin RV Connector
I installed this system http://rvpowersupply.com/toadcharge.htm using the 12 volt pin on the 7 pin connector instead of a separate cable, see this diagram for wiring of ANY connector https://www.etrailer.com/faq-wiring.aspx what I liked is the circuit breakers at both ends, protects against any issues.
Dave
__________________
Dave, Bobbi and Fenway
2005 38' FDTS Alpine Limited, 2016 Jeep Grand Cherokee Limited
Lake Wales, FL
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02-26-2017, 09:45 AM
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#4
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Junior Member
Join Date: Jun 2016
Location: Melbourne, fl
Posts: 15
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Thanks for the great information. The charger I found is actually a D.C.-D.C. Charger but prevents overcharging. Follow up question please: if I use the 5-pin on the car side with the fifth pin to the battery, will the standard 7 pin to 5 pin cable use that same pin for the constant 12v? Also, how much current will the constant 12v handle?
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02-26-2017, 09:56 AM
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#5
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Senior Member
Join Date: May 2013
Location: Ontario, California
Posts: 2,429
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I'm not sure where you're going however here are 2 links to trailer plug wiring.
On the 5 pin, use the "electric brakes" as your battery charging circuit.
I'd forego the use of the 12 volt charger and just run the wire as I described in my previous post.
The battery in your car will stay charged via the alternator/batteries in your coach and will not over charge.
By the way, this isn't a "first" It's done all the time and is well proven.
http://www.hopkinstowingsolutions.co...ring-codes.pdf
https://en.wikipedia.org/wiki/Traile..._North_America
__________________
[SIGPIC][/SIGPIC]2016 Newmar Dutch Star 4369
Newmar Owners Club
USAF 1966-1969,- Law Enforcement 1969 - 2003, Retired since March 2003
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02-26-2017, 01:37 PM
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#6
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Senior Member
Join Date: Aug 2015
Posts: 6,909
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Paul-
Is your Bounder built on a Ford or Workhorse chassis?
If a Workhorse, I can't help you.
If a Ford, I'll tell you that Ford does not provide a charging circuit on their F-53 chassis. They leave that up to the "coach builder" (in your case, Fleetwood) to provide. Perhaps they did, or perhaps they didn't, because your coach is old enough that Fleetwood may not have chosen to install a charge line. If you call Fleetwood, you may get an answer on this.
Our coach's owner's manual lists a charge line fuse in the Monaco-supplied main fuse/relay box. I haven't found many gasser manuals from our era that are detailed like that, enough to know for sure one way or the other.
Test your 7-pin connector first to see if 12V shows on the correct pin with the coach engine running. If not, you may be looking at running your own charge line. It's not difficult to do. Many iRV2 threads have discussed the parts needed.
A charge line pin is included only with 6- and 7-pin connectors. If your toad's connector has fewer than 6 pins, I' recommend changing the connector out for one with six or seven pins. That way, everything is standard.
__________________
Mark
2008 Holiday Rambler Admiral 30PDD (Ford F-53 chassis)
2009 Honda Fit Sport
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