Go Back   iRV2 Forums > MOTORHOME FORUMS > Toads and Motorhome Related Towing
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Thread Tools Search this Thread Display Modes
Old 03-22-2015, 05:38 AM   #1
Junior Member
Join Date: Dec 2014
Posts: 13
Car battery dead after towing

First long haul towing. We drove 7 hours yesterday with our Rav4 as a toad, unhooked and battery was too low to start car. We did have lights but just not enough umph to turn the engine. Got a jump and we are good to go now. The issue is how do we prevent it.

The place that installed all the tow equipment said we did not have to worry about the battery when we asked. We have a big umbilical cord that I thought was supposed to power the aux braking and keep the battery in the Rav from draining. Obviously I am wrong or the towing place did not wire it correctly.

Is there anything we can do to keep the battery going? Pull a fuse?

We do have to leave the key in accessories. Am sure my hubby may give you more info once he wakes up.

We have about 1.5 hours of towing today, but the return in a week.


Kris and Bert
2006 Beaver Monterey
malsbeaver is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 03-22-2015, 06:27 AM   #2
Senior Member
wa8yxm's Avatar
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 23,948
Several thoughts... one of the things I do not like about box in the driver seat brake systems is they eat battery power.. So do some others.

Towed Charge... This is a device that charges the towed via the motor home system... I have a version of it.

US-Gear Unified Brake Decelerator Aux Brake system instead of what you use now.... This is the version of towed charge I have. (Though I no longer have the brake system,,,,,it went with my last towed).

Aging battery on the RAV-4 When I got my new towed... I had that problem...Of course never a problem while towing due to the towed charge line...But it was a PITA when parked (Pain In The Anatomy).

Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 03-22-2015, 09:04 AM   #3
Senior Member
Selah's Avatar
Join Date: Oct 2012
Location: Indiana
Posts: 2,326
The RAV4 requires a lube pump, running the battery down could cause serious transmission problems. Your really NEED to have a charge line setup to maintain the toad battery from the MH. The seven pin MH connector has a pin available for that purpose. You will need to make sure that the pin is hot and that a fused line is connected from the toad connectors (6 pin?) to the toad battery.
Paul, Kathy, and Tux the Mini Schnauzer
2014 Tiffin Phaeton 42 LH, 2013 Honda CRV
"When the time comes to look back, make sure you'll like what you see"
Selah is offline   Reply With Quote
Old 03-22-2015, 09:45 AM   #4
Senior Member
dennis45's Avatar

Join Date: Jun 2012
Location: BC
Posts: 6,846
Couple things come to mind.

1. Did your installer run a Charge Line through the umbilical cord? If he did, you will have a fuse at the MH end connection and one the the toad battery connection. Could be a blown fuse.

2. How old is your RAV? If it's like the CRV, the battery is only one step up from a lawn tractor battery and when you start to draw on it, you end up with a dead battery. I replaced our CRV battery with the largest battery that fits in the holder.

3. When you stop for lunch, start the toad and let it run for 20-30 min or so. On a long haul, this should be habit anyway.

Hope this helps.
Dennis & Carol
Said so long to our DSDP. Coming Soon, 2019 Unity LTV CB - 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake. And the 04 Bird
dennis45 is offline   Reply With Quote
Old 03-22-2015, 12:24 PM   #5
Senior Member
Timon's Avatar
Join Date: Jul 2014
Location: Tustin, CA
Posts: 992
As suggested above, look at installing a Toad Charge.
John (N6BER), Joyce, Lucas (Golden Retriever mix), Bella (Great Pyrenees) and Lance (Great Pyrenees).
Tustin, CA
Timon is offline   Reply With Quote
Old 03-22-2015, 01:15 PM   #6
Senior Member
TonyDi's Avatar

Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 12,271
A toad charge line is the way to go. It gets wired into your harness and you never have to worry about running the battery down again.
Tony & Ruth........... FMCA#F416727
Newmar Dutch Star 4320, Spartan MM Chassis, Cat C9, Jeep Grand Cherokee Hemi, Blue Ox Aventa LX, and Brake Buddy. TST 507 TPMS
TonyDi is offline   Reply With Quote
Old 03-23-2015, 01:09 PM   #7
ramblingdon's Avatar
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Feb 2015
Location: Ruskin Florida
Posts: 56
Blog Entries: 6
Stop and Run Engine every 4-5 hours of towing

I ran into this with my Jeep when we ran across country a couple of years ago. Many TOWED CARS must have the key ON (no engine running) so that the steering will not lock and the front wheels turn as necessary on the open road.

With the key on, all of your accessories are getting power; radio, AC, FAN, lights, etc. and after a few hours your battery can be drawn down enough that your engine will not start.

Its not an elegant solution, but most manufacturers recommend that you take the time every 4-5 hours, stop and run the engine for 20-30 minutes to get the charge back up on your battery.
And you definitely need to do this if your vehicle has front-wheel drive, this way you are not only recharging your battery, but you are running those internal pumps to get fresh lubrication to your wheel bearings and other parts in the front-wheel drive assembly.


ramblingdon is offline   Reply With Quote

battery, tow, towing

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Large power draw on chassis battery '94 Kountry Star omegacanuck Newmar Owner's Forum 54 01-31-2016 08:22 PM
Nissan Murano - Towing with an Eze Tow jondrew Toads and Motorhome Related Towing 10 08-18-2015 09:14 AM
Car battery dead after towing on tow dolly shydi Toads and Motorhome Related Towing 13 08-20-2014 06:49 PM
Fixin' the battery shut down issue ..... finally Karlos National RV Owner's Forum 2 07-21-2014 02:52 AM
Smart Car paulm90802 Toads and Motorhome Related Towing 17 04-13-2014 05:48 PM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:57 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.