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Old 10-29-2013, 09:08 AM   #1
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My Tow Vehicle Battery Keeps Dying

I tow a 2013 Ford Explorer behind my DP.
I use the Roadmaster Even Brake System.
The battery died on the explorer while I was towing.
I thought it was because I had the lights on but it happened again yesterday without any lights on.
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Old 10-29-2013, 09:50 AM   #2
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Quote:
Originally Posted by JamieBoyle View Post
I tow a 2013 Ford Explorer behind my DP.
I use the Roadmaster Even Brake System.
The battery died on the explorer while I was towing.
I thought it was because I had the lights on but it happened again yesterday without any lights on.
Run a "charge cable" from the coaches chassis battery to your car battery, protect both ends with 20 amp in-line fuses... no more dead battery.
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Old 10-29-2013, 11:22 AM   #3
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Quote:
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Run a "charge cable" from the coaches chassis battery to your car battery, protect both ends with 20 amp in-line fuses... no more dead battery.
Except I'd suggest 20 amp auto reset circuit breakers. If a fuse blows, your battery could be discharged until you found the blown fuse. I did it by using an unused pin in my umbilical cord between RV and toad for 12 v (+) charge line.
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Old 10-29-2013, 11:50 AM   #4
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I agree. One of the first steps installing my Unified tow brake was installing a battery line. I have had 6 & 7 pin connectors and both have a pin designated as +12 for connecting the batteries.
Good Luck
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Old 10-29-2013, 11:53 AM   #5
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I have the same brake system, and yes it ran my battery down on long travel days. Third time was enough. Thought long and hard about hot wire from coach, but me and electrical always seems something goes wrong. I opted to buy a booster battery with a compressor. No special wiring, I set it in the passenger seat floor plug the brake unit into it and off we go. Several times after a long day I test it, still plenty of power. At night I take it out of the car, and hook it to shore power. And if my toad, a neighbors toad needs a jump, I just carry the unit to them, no muss,no fuss. I have not ever tried the compressor, but it's good to know I have one.
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Old 10-29-2013, 03:38 PM   #6
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I also bought a booster battery for my one time dead battery, once was enough. So far it's worked out quite well, many others have also done this.
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Old 10-29-2013, 05:00 PM   #7
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Hi JamieBoyle,
As an alternative, consider this product.
TOAD-CHARGE Dinghy Vehicle Battery Charger/Maintainer
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Old 10-29-2013, 06:05 PM   #8
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We also ran a wire, auto reset fuse is a good idea as mine did burn out and I found out ...wait for it... when I found the battery was dead.
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Old 10-30-2013, 11:26 AM   #9
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The Even brake eats power from the towed's battery. IF the battery is marginal (Getting older) it can easily kill it as you are observing.

Soultion 1: new battery NOT an Optima
Solution 2: Towed Charge system (Google Towed Charge)
Soultion 3: Better braking system
Ready Break, Apollo auto Stop, Invisible Brake, US-Gear Decelerator, M&G (If motor home has air brakes) or any of the other motor home air powered systems

Invisible brake and US gear do eat electricity but make provisions to re-charge the towed... Towed charge does that as well.

That is one of several reasons I do not like the box in the driver's seat brake systems.
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Old 10-30-2013, 01:50 PM   #10
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This is what I use. Works for me. Just run a hot wire from the coach battery. If you don't have one run. BrakeBuddy-39332-Vehicle-Battery-Maintainer.
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Old 10-30-2013, 02:10 PM   #11
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very cheap and good battery charge kit. It isolates the mh from the toad, and costs $25. You cant get better than that!

Accessories | BrakeBuddy - Battery maintainer
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Old 10-30-2013, 02:17 PM   #12
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very cheap and good battery charge kit. It isolates the mh from the toad, and costs $25. You cant get better than that!

Accessories | BrakeBuddy - Battery maintainer
But that doesn't link MH battery to the wire harness. With so little information, I would bet it's little more than a fuse or circuit breaker, maybe a diode. Two auto reset CB would still be cheaper and works just fine.
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Old 10-30-2013, 02:30 PM   #13
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But that doesn't link MH battery to the wire harness. With so little information, I would bet it's little more than a fuse or circuit breaker, maybe a diode. Two auto reset CB would still be cheaper and works just fine.
Yes it does. It connects into the trailer plug +lead and then you run it into the connector on the car. On the other side of the car connector it runs directly to the car battery. I have used this product for 4 years and over 70K miles of towing. My car battery is fully charged when disconnected from the coach even over many day tow periods. I use a Patriot Brake system that I leave on and connected for the entire duration of the tow, of which I have gone coast to coast, and I have never had any dead battery issues. Additionally there is no need to disconnect any fuses in the car as it is always getting charged from the mh. And yes it is simply a diode and a fuse as well as some wiring. What more would you need?
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Old 10-30-2013, 02:39 PM   #14
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My 2012 Explorer did the same thing and I added a charge line to the TOAD. Solved the problem.
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