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Old 06-03-2014, 05:46 AM   #1
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Can you charge tow vehicle with 6 pin from rv?

I need advice to keep my tow battery charge. Will brake buddy run down battery?
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Old 06-03-2014, 06:33 AM   #2
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I forgot to say I have 2005 Aspect Winnebago with 6 pin connector towing a 2001 Chevy Cavalier. Will brake buddy drain battery while towing?
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Old 06-03-2014, 08:12 AM   #3
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When I used a Brake Buddy I never had a problem. I just switched from a 4 round to a 6 round and added a charging wire for my Ram 1500 as it has the air suspension and constantly tries to maintain level. With the ATV in the bed it will be busy.
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Old 06-03-2014, 08:14 AM   #4
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Here is a wiring diagram for 6 pin:

Trailer Wiring Diagrams | etrailer.com

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Old 06-03-2014, 09:24 AM   #5
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I use a Roadmaster Brake Pro, which is similar to the Brake Buddy. I have never had the Brake Pro run down the toad battery.

If you have separate brake lights and turn signals on the toad, you need the following connections:
1. Left turn signal
2. Right turn signal
3. Brake lights
4. Tail lights
5. Ground

That leaves 1 pin to use for your charge line. Make sure the charge line is a heavy gauge wire.

If you have combined brake lights and turn signals, you don't need the separate wire for the brake lights so you have 2 pins to choose from for your charge line.
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Old 06-03-2014, 10:48 AM   #6
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Thanks
How would I tell on my tow if 6th pin is connected to charge the battery. Where would I look ?
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Old 06-03-2014, 11:04 AM   #7
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RV running, check for alternator voltage with a voltmeter.
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Old 06-03-2014, 03:40 PM   #8
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my cable has 5 poles and one of them is a charging line. it is not standard you can always reassign each line for your purpose.
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Old 06-03-2014, 03:43 PM   #9
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Where do I connect to RV and to tow . I have 6 pin but only using 4 for tow lights, brakes and turn single. Can I go fro RV battery to tow battery with fuse in between ? Would that keep tie battery charged?
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Old 06-03-2014, 04:19 PM   #10
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Yes. Run a #12 or #14 wire from RV battery to a fuse holder w/10 or 15 amp fuse. Then from fuse to center pin on 6 pin male at rear of RV. In the toad 6 pin, run a wire same guage to a fuse with a 10/15 amp fuse, connect fuse to toad battery. Using fuses at each battery protects from any shorts. Make sure your 6 pin cable has the center wire installed. Use a mult-meter to check continuity. After all is installed, check voltage at the toad when motorhome is running and toad not running, you should have 13.5+ volts.
Keep in mind a #12 or #14 wire will only give a small 2-3 amp charge, but is enough if your toad battery is at full charge and in good shape ie no bad cells.
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Old 06-03-2014, 06:12 PM   #11
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Make sure your ground wire is large enough to carry the maximum current you might be sending to the toad. I would assume this would be charging current plus the current pulled by the brake lights.
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Old 06-03-2014, 06:24 PM   #12
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Will the brake buddy run down the battery depends on several things.
Length of trip, size of starting battery on car, age of battery (as a percentage of when it it time to replace) as they near replacement time ti's easier to run 'em down.. Just like my phone, was down to about 2 hours run time, now up to 10. (new battery).

Can you charge off six pin... I do not know, I know what 4 of the pins are but I do not know the other two..

Right/Left Turn/stop, Tail and Ground, those are 4 of the pins.

On my six pin the other two are Power to the LP-1 and Pressure sense to the alarm unit.

Or Brake control and sense

Or Brake control/sense and 12 volt battery tie
Or.. Well hopefully by now you realize the other two can be used for many things.
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Old 06-04-2014, 09:44 AM   #13
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I have a 2002 Cavalier with a Brake Buddy. We have really never had any battery problems (over 65,000 miles of towing), but I do run the Chevy every night for about 15-20 minutes. Oh, I also use wireless magnetic taillights, so I have no drain there.
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Old 06-08-2014, 05:59 PM   #14
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AggieDad how do you like your wireless tail lights? I just bought a set to try.
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