7 way round to 6 way round trailer plug

[DEERE3594]

Im Mrs. Deere I have a horse trailer with a 6 way round and the diesal truck is a 7 way round. We have break lights and turn signals but no parking lights. Is something wrong or do we need an adaptor??

Thanks for the help!!
Mrs. Deere

 

[83GMCK2500]

Reese has 2 adapters, and now I remember why. Depending on how your trailer brakes are wired.

Type I.
Type II.

 

[DEERE3594]

I talked to Mr. Deere and he said its a 7 wire blade on the truck and it looks the same on the trailer but it doesn't have the middle titty. Would that affect the trailer lights and trailer brakes?? Trailer brakes aren't working along with the parking lights.

Please help with any ideas. Thanks so much!!

Mrs. Deere

 

[DEERE3594]

anyone have any ideas?

 

[trouttrooper]

but it doesn't have the middle titty.

haha, never called it that before.

One of the adaptor types uses the middle for brakes IIRC.

Brakes will be the same two wires as Left and Right.

Marker lights are their own

Actual brakes will be their own.

Then ground wire.....for a total of 5 wires on the trailer (unless you have white back up lights)


Sounds to me like you need to
a. check fuses on truck
b. check wire connections inside the trailer plug for corrosion or bad connection
c. make sure your 7 to 6 adaptor is sending signals to the right places to the trailer plug


Best investment you can ever make to troubleshoot 12v electrical problems is a cheapo ohm meter from Wally world....or any auto parts store for that matter. That way you can check continuity as well as breaks in wires.

 

[tinypeckerwood]

I have a better idea, change the trailer plug. It will match most trucks and only takes about 10 minutes.

 

[01duramax6spd]

They make an adapter if the trailer has 6 round and the truck has the 7 flat RV type. The other way you have to make yourself. If the truck has the round one I'd set the trailer up that way too.

 

[DEERE3594]

I think I got it figured out... dose anyone have a wiring digram for the 7way?...

 

[SFC Cobb]

The 6 pin plug does not have the aux power wire for trailer lights. The 7 pin plug does. You need the adapter for a 6 pin to 7 pin. This assumes that the 6 pin plug is wired in the standard configuration.

Some horse trailer manufacturers have taken it upon themselves to wire their trailers different than the standard config.