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Open Roads Forum  >  Tech Issues

 > umbilical wire color coding

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dougrainer

Carrolton, Texas

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Posted: 02/10/19 11:04am Link  |  Quote  |  Print  |  Notify Moderator

dougrainer wrote:

DougE wrote:

Fortunately both the cargo standard and the RV standard used the same locations, only the wire color changes. Just as a personal preference I always wire to the cargo standard as most outfitters are more familiar with it.


Explain "Most Outfitters". Who are these Outfitters? Doug


I meant to explain in more detail. We and I advise customers that are either towing a trailer or a vehicle, to wire the trailer and the vehicle with a 7 way Bargman trailer(male) end and WIRE it to RV 7 way code. Almost ALL motorhomes built in the past 15 years will have a Bargman 7 way RV female tow plug on the rear by the hitch. It WILL be wired as the RV Bargman 7 way code. Do NOT use a 4 way or 6 way round plug on the towed trailer/vehicle. Using the 7 way Bargman means that regardless of the new or used Motorhome you buy and use your towed vehicle will connect without any issues. For a Towed vehicle add on brake system you have the extra 2 pins on the 7 way to utilize the add on brake system wiring. Doug

hotpepperkid

Kingman AZ

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Posted: 02/11/19 09:10am Link  |  Quote  |  Print  |  Notify Moderator

dougrainer wrote:

AS both links/diagrams are good, you MUST make sure you utilize the RV diagram. All others are wrong for Rv's. Doug


Excluding the colors the pin desanations are the same


2000 Ford F-350 SRW 4X4 PSD Grand Designs Reflection 295RL 5th wheel 50 gal X-ferflow in the bed tank. Banks big exhaust and Stinger kit.

dougrainer

Carrolton, Texas

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Posted: 02/11/19 09:49am Link  |  Quote  |  Print  |  Notify Moderator

hotpepperkid wrote:

dougrainer wrote:

AS both links/diagrams are good, you MUST make sure you utilize the RV diagram. All others are wrong for Rv's. Doug


Excluding the colors the pin desanations are the same


Are you serious?????? The COLOR code is ALL that matters. Doug

enblethen

Moses Lake, WA

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Posted: 02/11/19 06:24pm Link  |  Quote  |  Print  |  Notify Moderator

I sure would not trust color code as being all that matters.
You never know what a previous owner or even what a shop has done.
Best is to flash out each function in the trailer then connect to the correc connector location. Then after all is connected recheck from TV.


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dougrainer

Carrolton, Texas

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Posted: 02/12/19 05:46am Link  |  Quote  |  Print  |  Notify Moderator

enblethen wrote:

I sure would not trust color code as being all that matters.
You never know what a previous owner or even what a shop has done.
Best is to flash out each function in the trailer then connect to the correc connector location. Then after all is connected recheck from TV.



You are correct for aftermarket wiring installs. But, if you find a color code mismatch, you NEED to correct it. Makes it really hard for the next person to troubleshoot. Doug

enblethen

Moses Lake, WA

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Posted: 02/12/19 06:38am Link  |  Quote  |  Print  |  Notify Moderator

Color coding by manufacturer's wiring is non-existent as you know.
Yes, the standard seven conductor cable should be corrected, but it will take the normal person sometime to do it. Molded seven conductor cable assemblies are almost always correct.

hotpepperkid

Kingman AZ

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Posted: 02/12/19 07:38am Link  |  Quote  |  Print  |  Notify Moderator

dougrainer wrote:

enblethen wrote:

I sure would not trust color code as being all that matters.
You never know what a previous owner or even what a shop has done.
Best is to flash out each function in the trailer then connect to the correc connector location. Then after all is connected recheck from TV.



You are correct for aftermarket wiring installs. But, if you find a color code mismatch, you NEED to correct it. Makes it really hard for the next person to troubleshoot. Doug


Not going to happen with me. I dont care if the wire is purple, green, or what ever. It it make the left turn signal flash and it is suppose to flash then it good enough for me

enblethen

Moses Lake, WA

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Posted: 02/12/19 10:49am Link  |  Quote  |  Print  |  Notify Moderator

It is best to fix wiring errors where they occur so as not to make it worse.

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