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01-07-2014, 08:51 PM
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#1
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Junior Member
Join Date: Aug 2013
Posts: 16
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Charging tow vehicle battery
I am towing our new 2013 ford explorer with my 2005 National Tropical and wonder what is the best way to keep the battery charged while towing.
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01-07-2014, 10:12 PM
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#2
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Senior Member
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,925
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I used the center pin in a 6 wire umbilical cord and ran a wire (heavy gauge) from battery (+) in RV through cord to battery in toad. Near each battery I installed a 20 amp auto resetting circuit breaker to protect from shorts or over powering the wires. Has worked great from coast to coast. Toad battery is maintained by alternator in RV just like adding a battery to the chassis battery system. No need for expensive Toad charger Toad-Charge Towed Vehicle Battery Charger & Maintainer Kit - RV Power Supply
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Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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01-07-2014, 10:30 PM
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#3
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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Seems logical that the center pin would be for charging but it isn't in a standard setup. The middle pin on a 7 pin is for your reverse lights or brakes.
On a 6 pin it is for battery power.
Here's a link to the wiring info: Trailer Wiring Diagrams | etrailer.com
That's what I like about "standards", there are so many of them!! Ran into it all the time as a transportation engineer before I retired from it. Then went to computers and ran into the same thing!!
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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01-08-2014, 08:57 AM
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#4
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Senior Member
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,925
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Quote:
Originally Posted by Mr_D
That's what I like about "standards", there are so many of them!! Ran into it all the time as a transportation engineer before I retired from it. Then went to computers and ran into the same thing!!
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Not sure what you are getting at in your post. the 7 pin connector uses the 6pm position pin or spade for 12v (+). These wires are to provide a charging circuit for break-a-way battery in electric braking system. I'm using it to maintain a Toad battery. The wire is used to maintain the battery, not jump start or charge from a discharged state. The 20 amp auto reset circuit breakers prevent too many amps going either direction.
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Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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01-08-2014, 09:43 AM
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#5
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Senior Member
Join Date: Nov 2009
Posts: 209
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charging tow vehicle battery
Your tropical should have a 7 pin connector. My 12v is on 11:00 position on the motorhome end and 1:00 position on the umbilical cable. I would check with a multi meter on yours to make sure which is 12v position. You need to have ignition switched to on to make this test. From that determine the pin connection on the towed vehicle then install a 10 gauge wire to that pin on the towed vehicle, put in a wire loom and pull to the battery, put a 20amp fuse in line and attach fused line to positive terminal of battery. You will now have charged battery when you tow.
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2007 TropiCal LX
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01-08-2014, 10:41 AM
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#6
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Senior Member
Tiffin Owners Club
Join Date: Apr 2009
Location: Home in warm Sou Calif for the winter.
Posts: 1,401
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Quote:
Originally Posted by BFlinn181
Not sure what you are getting at in your post. the 7 pin connector uses the 6pm position pin or spade for 12v (+). These wires are to provide a charging circuit for break-a-way battery in electric braking system. I'm using it to maintain a Toad battery. The wire is used to maintain the battery, not jump start or charge from a discharged state. The 20 amp auto reset circuit breakers prevent too many amps going either direction.
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X2.
FWIW to the OP, a tow vehicle is one that is doing the towing (ie: your mh), a towed vehicle is one that is being towed (ie: your toad). Just thought I'd mention it.
Ron
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Ron, Sandie and Lilly
2013 Tiffin Phaeton 42LH 400 ISL | 2011 GMC Terrain SLT-2
Roadmaster All Terrain | US Gear Unified Brake System | Pressure Pro
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01-22-2014, 11:36 PM
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#7
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Senior Member
Join Date: Apr 2012
Posts: 122
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__________________
2003 Fleetwood Discovery 38U
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01-22-2014, 11:42 PM
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#8
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Senior Member
Join Date: Jun 2012
Location: AB
Posts: 7,587
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Quote:
Originally Posted by durhamj
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Cheaper than a piece of wire and a couple of fuses?
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2019 Unity LTV CB, pushed by a 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake
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01-23-2014, 10:03 AM
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#9
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Senior Member
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,925
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Quote:
Originally Posted by dennis45
Cheaper than a piece of wire and a couple of fuses?
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$82 could buy a lot of wire! I don't understand the advantage of the Toad Charge 60 over a wire and 2 auto reset circuit breakers. The yellow or green LED? If you have charged batteries in RV and toad, there is very little current flow between the two systems. When you start RV, a momentary high voltage imbalance is created, if current exceeds the circuit breaker's capacity, it shuts down. Seconds later, as RV alternator kicks in CB resets and all is right in the world. Leaving the two plugged in overnight, neither battery will leach off the other, unless one is bad, then you need to go buy a new battery....for about $82!
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Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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01-23-2014, 11:08 AM
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#10
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Senior Member
Join Date: Apr 2012
Posts: 122
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Quote:
Originally Posted by BFlinn181
$82 could buy a lot of wire! I don't understand the advantage of the Toad Charge 60 over a wire and 2 auto ...... ...... ...... ..... ....... world. Leaving the two plugged in overnight, neither battery will leach off the other, unless one is bad, then you need to go buy a new battery....for about $82!
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All good points .. I'll have to reconsider getting the Toad-Charge. . . . I did like the idea of a total solution delivered ready to install.. Besides, the other hurtle I face is the umbilical from MH to Toad is only a 4-wire. No constant 12 volts lead being passed to the Toad.
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2003 Fleetwood Discovery 38U
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01-23-2014, 11:40 AM
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#11
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Senior Member
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,925
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You could use these connectors to make a 2 wire connection:
Sea Dog Corp 4268801 2 Wire Polarized Connector w Leads | eBay
I was going to do this, then I found a good price on a Blue Ox 6 wire coiled umbilical cord and used two 6 pin sockets to make a one piece connection between my RV and Toad. I liked the coiled cord to keep it off the road.
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Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
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01-28-2014, 01:30 PM
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#12
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Senior Member
National RV Owners Club
Join Date: Mar 2010
Location: Spring Lake, Michigan
Posts: 301
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With the key turned to ACC, just pull the ignition fuse.
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01-28-2014, 02:49 PM
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#13
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Senior Member
Join Date: Apr 2011
Location: La Quinta, Ca
Posts: 221
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Check the FMCA website for Dinghy towing on 2013 Explorer. Our toad is a 2010 Fusion Hybrid. We tow 4 wheels down. When I stop for gas I start it up and run for 5 min. Have never had the battery go down. If we stop at a rest stop I will start the car while DW takes the dog for a walk. Just remember to put it back in neutral and turn key to ACC
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02-03-2014, 10:21 AM
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#14
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Senior Member
National RV Owners Club
Join Date: May 2013
Posts: 109
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Hi there,
Not sure what towbar / braking system you have . We tow a 2013 Honda C-rv behind our 2001 Surf Side. We use the Roadmaster Falcon all-Terrain towbar and the InvisiBrake. In the manual for the InvisiBrake it states...
"Turn the motorhome park lights on — this will activate the InvisiBrake charge circuit, which will provide a constant trickle charge to the vehicle’s battery during towing."
So I always drive with my MH lights on (as I do for safety with all my vehicles) and have never had a problem (knock on wood) with a dead battery in the Toad. I added a "Headlights are still on" buzzer that reminds me to turn them off when I turn the MH engine off so I don't drain the engine battery by accident.
Rich
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2001 Fleetwood Discovery 38F, 2013 Honda CR-V, Roadmaster Falcon All Terrain Tow bar. Magalia, CA, iRV2 Supporter, Member FMCA
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