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Old 11-03-2009, 12:39 AM   #1
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Wiring question..MH to toad

7 wire MH connector and want to use a 6 wire cable ( 4 wire for brake lights and turn signal and one for toad brake light monitor in MH) Should I rewire MH or use adaptor, diodes or ? If someone could advise it would be much appreciated. Thanks
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Old 11-03-2009, 05:21 AM   #2
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If you look around the automotive section of Walmart or check an auto parts store, you should be able to find a 7-pin to 6-pin adapter. Use a test light or volt meter to check to see which pin is which so you can wire the toad accordingly.
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Old 11-03-2009, 11:04 AM   #3
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7 on the MH 6 on the car... Use an adapter or make up an adapter cable The difference is the "AUX" terminal (usually used for back up lights) is very simply not used on the six terminal version

To "home make" and adapter take either a 7 pin towed to towing cable or a six pin, remove one end and replace with the other plug.

Either tape off the 7th wire, (if you use the 7pin cable) or do not connect anything to that pin (if you use a six pin cable)

NOTE If you can salvage the plug you remove.. Do so, you will need to replace it some day (I did my plugs about six weeks ago)
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Old 11-03-2009, 11:01 PM   #4
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OK, I have to explain and reask here. I'm going from brake lights and turn signals on the motorhome to a 4 wire system on the car. Do I need diodes on the motorhome or Roadmaster makes a brite-lite converter? Thanks
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Old 11-03-2009, 11:21 PM   #5
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I installed (3) diodes in my jeep. No adapter on Monaco.

Mike
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Old 11-04-2009, 12:28 AM   #6
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If your MH has SEPARATE turn signals and brake lights and your toad has COMBINED brake and turn lamps, you will need an adapter to combine the separate signals on the MH for the toad. Also you will need diodes on the toad.
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Old 11-04-2009, 02:45 PM   #7
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I think I'm adding to the confusion. MH is 7 wire, toad is 4 wire. Toad wiring extra bulbs, and not tapping into the toads wiring.
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Old 11-04-2009, 03:33 PM   #8
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If adding extra bulbs on the toad, delete the need for diodes.

How many pins are on the MH doesn't matter. What matters is the brake/turn signal configuration. If they are sepatate lamps, you need an adapter to combine the signals unless you have separate lamps on the toad. In that case you would need a five wire harness (left turn, right turn, brake, tail, ground).

Most of the web sites for the companies that make this stuff have very good information available. Also, the Blue Ox site has just about everything that you need to know about connecting a toad.
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Old 11-05-2009, 06:50 AM   #9
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Roadmaster has wiring diagrams on their web site that cover various toad wiring configurations. These include combined turn signals/brake lights on the motorhome and separate on the toad and vice versa, as well as diagrams for separate-separate and combined-combined turn signals and brake lights. Although it sounds like you don't need them, they also have wiring info for diodes. Click HERE and scroll down near the bottom of the page.
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Old 11-06-2009, 12:11 AM   #10
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I just completed the wiring of my 06 Saturn Vue today. I wired a 6-way receptacle on each end, the MoHo and the Toad. I purchased 25 ft. of 6 wire 14 gauge cable from E-trailer and 6 Roadmaster Hy-Power Diodes. I used the wiring diagram from Roadmaster and I am using a Roadmaster 6-way flex cable to hook up from the MoHo to the Toad. Red for brakes, Yellow for left turn signal, Green for right turn signal, Brown for tail lights, White for ground. The sixth one, Black, was cut off as it wasn't needed.

If you have a 7-way on the MoHo, you just need to trace which lug performs which function. Hopefully it was wired according to the RV Standard. Here is the website for the Standard RV 7-Way connection.

7 Way RV Plug & Receptacle Wiring Diagram pictures from trucks photos on webshots

Then get a 7-way plug and cable to make your own converter cable to the Toad depending on whether you need separate or combined. If the Toad requires combined, an adapter will need to be purchased and installed on the Toad.

Good Luck and remember to always test your work and connections before heading out on a long trip so you can discover if something is not working correctly or maybe there are crossed connections or whatever. It's easier to fix it at home than on the road.
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Old 12-18-2009, 07:43 PM   #11
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I intend to install a brakke buddy battery maintainer, which instructs the user to connect the wire to an unused pin of a 6 or 7 pin umbilical cord. However, my umbilical is 4 pins and all are used thus requiring a separate wire. I would appreciate any and all suggestions re easy to connect and disconnect connectors that will be waterproof while connected or disconnected. Thanks Waterdog4315
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Old 12-26-2009, 06:37 PM   #12
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Just use a tail light converter. I had the same situation. I installed a heavy duty tail light converter to first use a tow dolly and eventually I went to a 4 wheels down vehicle and use the same 4 pin connector for the dinghy tail lights and brakes.
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Old 12-26-2009, 11:03 PM   #13
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Quote:
Originally Posted by JPMaly View Post
I think I'm adding to the confusion. MH is 7 wire, toad is 4 wire. Toad wiring extra bulbs, and not tapping into the toads wiring.
I think this is what you are trying to do...
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Old 12-28-2009, 10:48 AM   #14
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If you already have the cable on the towed.. Use an adapter

If you do not already have a cable on the towed, Use a 7 pin plug and leave the 7th pin not-connected It's for the back up lights by the way, you don't back up when towing 4-down.
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