7 pin to 6 pin help!!

[Heimbuch]

I'm at a loss...

2023 Freelander 26D on a Ford E450 chassis. There is 12v going to the 7 pin at the hitch.

2021 Jeep Gladiator wired at the bumper with a 6 pin. Checked with 7 to 6 cable, signals and lights good.

The issue comes in when the cable is connected from the Freelander to the Jeep...NOTHING. Am I missing something? I've checked the connection with 2 separate cables with the same result.

Any help appreciated

 

[Believer45]

If nothing works on the Jeep I would first suspect no ground. I would start with a jumper cable from the jeep negative post on the battery to the frame of the coach to establish a good ground and see if that changes anything.

 

[Heimbuch]

I was thinking along the same lines as well but thought that the tow bar would have eliminated the ground issue. I’ll give this a shot today and see where it goes. Thank you!

 

[aceinspp]

I'm at a loss...

2023 Freelander 26D on a Ford E450 chassis. There is 12v going to the 7 pin at the hitch.

2021 Jeep Gladiator wired at the bumper with a 6 pin. Checked with 7 to 6 cable, signals and lights good.

The issue comes in when the cable is connected from the Freelander to the Jeep...NOTHING. Am I missing something? I've checked the connection with 2 separate cables with the same result.

Any help appreciated

I see this is your first post. Welcome to the forum. Consider going to the welcome Mat sub forum and introduce your self and give us a little info about you. Later RJD

 

[Heimbuch]

Thanks

 

[brucemc]

A mechanical connection between tow and toad is never appropriate for a reliable ground.
Your six-wire umbilical should contain:
White: Ground
Bown: Tail & Marker
Green: Right Turn
Yellow: Left Turn
Blue: Electric Brakes
Red: 12V power for charge line, etc.

The 7 pin setup adds purple for backup lights, if used.

The ground pin is the larger of the 6 as it is the return line for all other functions.

This is from eTrailer:
https://www.etrailer.com/faq-wiring...lw-HJEpBjuCBEv4tBNvyvIzRI2hrvkxRJucrIQ5koBWPl

Help that hopes!

 

[Heimbuch]

I’m going to get a chance to dive into it tomorrow. I did get a chance to throw a 7 pin tester on the RV side today and the only light I got was a 12v. I’m thinking, possibly, the plug is wired differently than the cables I have that go to the 6 pin at the Jeep. I’ll let you know how it goes…thanks for the link.

 

[Heimbuch]

Checked ground with cables from the Jeep to the RV chassis; no go.

Pulled the 7 pin at the RV to check the wiring and it’s all over the map.

Top left: green
Left: red
Bottom left: white
Bottom right: blue
Right: black
Top right: orange
Center: yellow

 

[brucemc]

That looks like travel trailer/fiver wiring, per this chart from e-trailer:

with the exception of:
Top-right (should be black, not orange) and
Right (should be brown, not black).

Problem is that it's almost impossible to determine function from wire color. While the colors are supposed to represent functions, even I've been guilty of using whatever I have on hand.

There's also a question of combined vs separate signals/brakes. Our Sunseeker has combined brake/signal, where the Canyon as separate brake lights and signal lights.

The wiring in the GM chassis has both, so I wired the connector for the separate setup so the Canyon has both signal & brake, thus I was able to illuminate both brake lights and the CHMSL (center high mounted stop lamp) in the canopy.

To start, you'll need to map the functions on the 7-way on the motorhome and on the 6-way on your Jeep. Likely your Jeep & umbilical are wired to a 6-way trailer standard (as I believe mine is), then change the wiring in the 7-way socket on the motorhome to match those functions.

Ah, the fun of trailer/toad wiring!!

 

[D W]

I'm acquainted with a 4 pin, 7 pin and a 9 pin. Never heard of a 6 pin. I wonder what whiz kid thought that one up?

 

[pgandw]

My 2000 Coleman popup had a round 6 pin which is considerably smaller physically. I think there was an attempt to use it for smaller trailers and tow vehicles, as the 7th pin generally goes unused anyway, and lighter wiring used in the smaller vehicles.


Fred W

 

[brucemc]

I prefer the 6 pin setup, as it is a smaller version of the commercial connectors, such as the 7-pin commercial in the image I posted in #9.
I've had so much trouble with the 7 pin round with flat connectors which back out and create very poor to non-existent connections. There so much variance between manufacturers, most are made as cheaply as possible. I've had to wrap a ball bungie around the plug and socket to keep the plug in place due to the contact design.

The commercial 7 pin and, commonly, the 6 pin bodies are zinc with brass barrel connectors. It's a much better design. I replaced the 7 pin with a 6 pin round on my 2012 Canyon not long after I purchased it new. I have adapters for 6 to 7 and 6 to 4 flat so I can tow a wide range of trailers, including those with trailer brakes. Our larger single axle & tandem trailers have the 6 pin round, where the smaller single axle trailers have the 4 pin flat as they have no brakes.

 

[garywilson]

I'm acquainted with a 4 pin, 7 pin and a 9 pin. Never heard of a 6 pin. I wonder what whiz kid thought that one up?

At least 60 years old system.

Lots (and lots) of adapters.

https://www.amazon.com/s?k=7+to+6+p...ix=7+to+6+p,aps,145&ref=nb_sb_ss_ts-doa-p_2_8

 

[Iwritecode]

My very first pop-up trailer had a six pin plug. Was a pain to find an adapter to the 4-pin plug I had installed on my vehicle.

Looked like this:

 

[Mr. Dan]

My utility trailer has a 6-pin connection on its cord - but it’s round. I have an adapter to my truck’s 7-pin.

It has all the connections my 5th wheel does except it has no charge wire - no battery.

 

[5picker]

Yep... there are TWO DIFFERENT 6 pin "trailer" plugs.

The square one as in post #14 and the round one that is similar to the 7 pin.
It is imperative when asking about a 6 pin to 7 pin to clarify which 6 pin, one has.