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Old 02-12-2017, 08:56 AM   #1
Winnebago Camper
 
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Motorhome Trailer Harness

2003 Adventurer - Trying to setup Tow Dolly wiring. There are 5 wires coming to the 6 way vehicle connector - 4 are yellow and 1 white???? I have a 4-way trailer wishbone flat connector. At the vehicle connector using VOM I find the HOT wire (yellow) and the white wire is Ground. I can locate two of the remaining Yellow wires that pulse for the R and L turn signal. The remaining yellow wire appears to have 2. +/- V on the meter. I have set the configuration ????? Just trying to have tail lights, brake lights and turn signals on the trailer
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Old 02-12-2017, 11:39 AM   #2
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Here's a link to 4,6, and 7 wire trailer plugs...


PJ Trailers Trailer Plug Wiring
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Old 02-12-2017, 02:48 PM   #3
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THX for the link . . . . Guess I'm surprise that all of the wires are yellow. All the identifying #'s stamped on them are the same. Guessing I just attach the last yellow wire (source or purpose unknown) to the vehicle 6-way and not use it.
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Old 02-12-2017, 06:06 PM   #4
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ezdavie-

Winnebago provides wiring diagrams and the secret decoder list at this link.

The particular diagram you want is sheet 5 of the 2003 Adventurer 35U "Auto Lamps Wiring Diagram," at this link. Use the secret decoder list to interpret the wire codes.

You need to know which chassis your coach uses. A diagram listed as "FD" is Ford, and one listed as "WH" is Workhorse (Chevy).
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Old 02-13-2017, 07:28 AM   #5
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Haven't looked at the diagram but I believe the last wire might be for backup lights. Our MH has a 7 wire plug and brake controller installed. Previous owner said he never towed with it. I was blowing turn indicator/backup light fuse when the towed was hooked up. Same as yours, 1 white wire, 5 yellow, plus one from the brake controller. Several of the wires were in the wrong spot, backup light wire was connected where the ground should have been. Anyway, I think that's what your mystery wire is for and you really don't need it.
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Old 02-13-2017, 04:31 PM   #6
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Got-er done!

On further investigation I discovered that the 4 yellow wires definitely were stamped with a diferent three character designation. These 3 letters corresponded and matched up with the appropriate pins on the connectors in the wiring diagrams. As usual "I" made this much more complicated that I needed to.
THX to all for your assistance.
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Old 02-13-2017, 05:41 PM   #7
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Can't you just purchase an adaptor to go from the six-wire receptacle to a four-wire plug...?
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Old 02-28-2017, 02:46 PM   #8
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6 round to 4 flat

https://www.amazon.com/s/?ie=UTF8&keywords=6+round+to+4+flat+adapter&tag=mh 0b-20&index=aps&hvadid=4966671581&hvqmt=e&hvbmt=be&hv dev=c&ref=pd_sl_20kkjb93sf_e[/URL]
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