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Old 08-31-2014, 09:01 PM   #1
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Toad wiring using roadmaster kit#155 problems

When the dealer wired up our Toad, he used Roadmaster's bulb & socket kit #155. My motorhome has separate brake (red) and turn signals (amber) lights. When you step on motorhome brakes, you get feedback such that the motorhome turn signal lights come on in addition to the brake lights. This causes an overload problem which burns out the brake light fuse in the motorhome after a short period of time - not immediately. Do I need a converter because the motorhome has separate turn signal lights from the brake lights? Any suggestions or ideas would certainly be appreciated.


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Old 08-31-2014, 11:37 PM   #2
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Suspect you need to install diodes in the lines to allow current to only flow one way. Roadmaster Inc. - Tow Bars, Braking Systems & RV Accessories
Also with everything hooked up take a meter and verify you have a ground connection from the motorhome to the toad. If they did not run a ground wire and are just relying on the metal connection of the tow bar that can sometimes cause you weird problems.

Brian, Loretta & Daisy (Golden Retriever)
2008 Holiday Rambler Endeavor 40 PDQ , ISL 400
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Old 09-01-2014, 08:04 AM   #3
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Yes you need the converter. I'm on my IPad or I would link the one I used in the past.
2013 DSDP 4347, all electric, 450 H.P. ISL
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Old 09-02-2014, 07:11 AM   #4
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Are you running the 7 pin connector in the RV? If so, the separate turn and brake in the RV cannot be passed through to the toad from what I found. Therefore, I suspect the way the kit was installed is not correct. The kit includes standard bulbs that are installed into the tail light housing. Depending on where they installed the bulbs, it may be lighting two sections of the tail light housing itself.

Watch the video at this link that shows installation of the kit, it will make more sense what might have happened. The sonic video is the one I looked at.

Link to Kit 155 installation video
2005 Newmar Kountry Star 3742 - Gas
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Old 09-05-2014, 02:59 PM   #5
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Thanks to all who viewed and responded to my problem. What I needed was a converter. What had me confused was I had talked to a technician at Roadmaster's factory, and was told I did not need a converter but more than likely had a ground problem. In addition to that, I had assumed Camping World's technicians that had installed my hitch and wired my vehicle knew what they were doing. Obviously I was mistaken. Problem solved. Thanks to all.
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Old 09-07-2014, 07:41 AM   #6
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Camping World's technicians ... knew what they were doing.
Now there is an oxymoron!
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Home is in the Ocala Nat'l Forest near Ocala, FL
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Old 09-07-2014, 08:15 AM   #7
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One other thing you need to check if you are using toad brakes and I would suggested you do, if your toad brake system mashes the toad brake pedal and the brake lights comes on with the key in the tow position you will need a brake relay or the toad brake light will cover up the turn signal from the coach.

Walt & Will
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toad, wiring

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