Electrical Trailer Plug on Holiday Rambler Arista

My 2003 Chev truck 7-pin has its own Chev colours and you have to translate those into the "standard" 7-pin colours. There are websites about that. (Same with brake controller plugs by brand of truck)

My 1991 MH has a towing receiver and a really weird wiring plug thing that I have not figured out yet. Similar to the one in a 1996 car I have with a trailer plug. Must have been a change since the 90s in how these things are done.

dougrainer wrote:
Most Google searches will bring up WRONG 7 way trailer wiring and colors. This is the correct code. Doug

Left Turn is RED
Right Turn is BROWN
Running is GREEN
Ground is WHITE
Brakes are BLUE
12 volt HOT is BLACK
YELLOW goes to the center pin and can be whatever you want it to be(reverse/brake buddy/anything) The Yellow is DEAD on RV's and Trucks from the Factory. It has been years since I have found a Yellow connected to the Reverse lights on a OEM vehicle.

The odd thing is that the above color code was NOT what used to be found on the 7-pin plugs. Even today, 4-wy, 5-wy, 6-wy, and "traditional" 7-wy plugs all use the same code;

Left turn is Yellow
Right turn is Green
Running is Brown
Ground is White
Brakes are Blue
Hot (+) is Red or Black
Reverse (center pin) is Purple

A few years ago (OK, 5-8 yrs?), the industry changed the 7-pin RV plugs to what you've listed; not sure why they decided to "fix" something that wasn't broken, particularly since now those colors don't match any other type of trailer out there. Here's a good link that shows the traditional color codes, as well as the RV ones: Trailer Wiring You'll notice that every single plug has matching color codes for RT, LT, and Running lights except the RV 7-wy plug. Scrolling to the bottom will also show a chart listing some of the differences in OEM manufacturers, as well.

8e3k0 wrote:
Need lights only to the 2014 crv Honda being pulled behind the motor home. Honda is not wired for brakes..
Any help would be appreciated. Thanks Ellis

I was under the impression that a brake was required in Canada?

Regardless the reason I have a brake on my 3,200 lb CRV towed by a 40,000 lb MH is safety and liability. Should the unfortunate happen I would not want to be explaining to a judge why I didn't meet the requirement of his state or providence.

Quite interesting as the hitch is a new roadmaster and the electric cable that comes with it is a 7 pin at the male end and 6 pin at the female end that plugs into the car.

8e3k0 wrote:
Honda has been already wired with a female 6 wire plug. No electric brakes. Wiring to back with said diodes to prevent back feed to the cars electric circuits.
Appreciate the help from all responses, we be working on it tomorrow afternoon. Thanks.

We always remove any Plug that is NOT a standard Bargman 7 way on a customers tow vehicle when them come in for delivery. We then wire the correct 7 way trailer end on his tow vehicle. NOBODY uses a 4 way or 6 way plug OEM on any Truck or Motorhome. They all use 7 way Bargman's. ANY shop that would wire a 6 way or 4 way, is just plain dumb. Doug

Honda has been already wired with a female 6 wire plug. No electric brakes. Wiring to back with said diodes to prevent back feed to the cars electric circuits.
Appreciate the help from all responses, we be working on it tomorrow afternoon. Thanks.

1. Does the Arista HAVE a 7 way that appears Factory installed? I assume you are NOT the original owner and who knows what previous owners have done to the Arista wiring system.
2. Attempting to tap OFF the 3 wires you mentioned may not be a good idea, unless you have determined they ARE--RED (LT)---Green (RT)---Brown(running lights), which would be OEM code.
3. Is the Honda already wired for Lights, or are you planning on tapping into the existing Honda Wiring? Not a Good idea unless you go all the way to the Rear Honda lights and install Diodes to prevent feedback and possible damage to the Honda OEM wire system. Doug

Most Google searches will bring up WRONG 7 way trailer wiring and colors. This is the correct code. Doug

Left Turn is RED
Right Turn is BROWN
Running is GREEN
Ground is WHITE
Brakes are BLUE
12 volt HOT is BLACK
YELLOW goes to the center pin and can be whatever you want it to be(reverse/brake buddy/anything) The Yellow is DEAD on RV's and Trucks from the Factory. It has been years since I have found a Yellow connected to the Reverse lights on a OEM vehicle.

Before I would do a danged thing I would GOOGLE Honda forums and research user history with connecting trailer lights to this vehicle. Computer snags, imperil casual connection to lamps circuits these days.

Wonder when they're going to connect spare tire jack performance to the ECM? The nerds are getting carried away just like with computers and programming.

Walmart.com has a 7 pin to 4 pin adapter, $10+ shipping. Find it today at your local store, auto parts or? No shipping. Of course this counts on the 7 pin connection being wired correctly by the installer / prior owner.

Getting a 7 pin cord has the advantage of perhaps having a +12 volt line from the RV to keep the Honda battery full.