Hello Everyone,

I have a brand new 2011 F250 Super Duty Lariat (6.7 Diesel). I love this truck by the way!!!

Anyway, when my camper is attached and plugged into the 7 pin plug, all of the brakes and lights work, but the 12 volt power line to charge the battery on my trailer is not working. I checked the Power Distribution Box and the 25 amp fuse is in correct socket (#90) and the relay is in place in socket 102. I have checked the voltage on the appropriate lead on the 7 way connector and I have NO voltage on the lead "12 Volt Battery Power" which is what should be charging the batteries on my camper. Any ideas as to why the 12 volt is not working on my 7 pin trailer connection?

I know on my previous truck, F150, I had to insert a relay to enable it. Any ideas????

Thanks,
gascan

 

Interesting....I had no troubles with my 08 F150 and havent towed my 5th yet with my new F250....

 

Are you testing it with the key in the Run position?

 

if you have a test light can u see if there is power where the relay goes?
should be 2 of the 4 pins, 30 and 84 or 86.
of course has to be with key in Run position.

Sam

 

yes make sure the key is on.

i've installed about 20 7way connectors on '11's so far and all worked with nothing more needing to be done besides wire it up(non pickups)

 

Since you all seem to know about these plug ins.I wand to run the ground and power wire off my tidy tank pump to a 7 pronge plug-in on my 2011 f-350.Should i hook my power wire to the number 3 prong and the ground to the number 1 prong?I have the 7 point plug just want to wire it right the first time thanks.

 

 

So my wires should be hitched to 3brown for my power and 1 white for my ground?I want to be able to unplug and leave in box for convieniance.would this be the best way to wire my plug for this purpose?Thanks for your help also.

 

3 brown is for marker lights with small fuse
4 black is for 12V power with 25 or 30 amps. But it works only with ignition on.

 

ok i will try with it hitched to number4 for power and see if that works out for me.Thanks again for the insight.The truck will be running when fueling is required.

 

Yes I am. Both with the truck running and not running.

 

Yeah, my running lights, tail lights, brake lights and blinkers all work great. It is only the lead to charge the battery on my RV from my truck that does not work.

Do know for sure that the truck is charging the battery on the RV's attached to these trucks or was just the basic (brake/blinker/running light) check done?

Thanks,
Chris

 

Well, when you get a chance let me know if it charges your RV battery. Like I said, all of my other functions work fine (brake, running, and blinker lights).

Thanks.
gascan

 

If you are not getting any voltage on the power pin with the key on then there is a problem. But you already know that.

How did you check the fuse? Visually or with a meter or test light. If the fuse tests OK, and it's a brand new truck, I'd take it to a dealer and let them fix it. It may be as simple as they missed plugging something in.

 

Sorry gascan for the hijack also.i read the title to the thread and knew that someone would know the answer quickly.Carry on.