My truck has the towing package and includes the 7-pin trailer wiring harness connector in the bumper. Does anyone know if something special has to be done to make the pin for trailer auxiliary power (i.e. power for the interior lights of a trailer or for charging an on-board deep-cycle battery) live? I think this is the pin at about 5 o'clock. With the truck running I didn't get any power on this pin. My buddy says on his '08 3/4 ton Suburban they had to actually install a fuse in the fuse box to get that pin to work (that's what their owner's manual told them to do). Just wondering if anything like that is needed for the RAM? I haven't had time to dig through our on-line manual yet so I figured I'd ask here first.

Thanks,
Rob

 

By the pics i can find looks like the pin you are talking about is the ground... Our trucks do have a constant 12v+ in that plug... it looks like it's in the top right... here's a link to a pic that might help a little bit... The only difference with our trucks and this image, is the center pin... It's shown as AUX in the pic here, but on our truck it is setup as reverse lights...

 

Thanks. I did find the same type of diagram in the electronic owner's manual too now. So, if I'm behind the truck looking at the jack it behaves like the 'front view' on the left of the diagram. And the +12V at the 1 o'clock position is indeed live all the time (when truck is running).

I guess the issue we have to figure out now is why the interior lights in his trailer behave differently when hooked to my RAM versus his 'burban.

Thanks,
Rob

 

The trailer wiring could've been changed to suite needs, many people modify trailer wiring to meet their needs... And, if you are standing behind your truck, it would be the diagram on the right... (the diagram is for the male end (from the trailer)) so looking at the back of it, would match looking at the harness on the back of your truck... LOL, hope that made sense...

 

Not sure I quite follow, Devile... When I stand at the back of the truck, looking towards the front (facing tailgate) the wiring diagram on the back of the 7-pin jack cover looks like the picture on the left side and that's how the pins behave.

Rob

 

Yes, that is the way it is wired - and it is hot all the time - not only when the engine is running.
I just had a shell put on my truck and I wired the interior light to the 1:00 o'clock pin.

 

I am having the same issue. When I bought the camper the wiring was plug and play with my 2008 Siverado (except I had to add a fuse to the fuse box to make the charginf pin hot in the 7 pin harness). I just plugged in my 2010 Ram 1500 and everything works properly except there is no Aux or charge going to the camper. Is there a fuse or does it have to be rewired? With the Chevy being plug and play I assumed the Dodge would be as well, is there not a standard config for the 7 pin harness on trailers. The camper is a 2010 as well if that helps

 

I went from a GMC 2000 sierra with the factory towing 7 pin connector to the 2009 Ram SLT CC. The trailer works the same in both trucks. The only difference was that on the GMC, I had to install a 40A fuse provided by the dealer when I got the truck.

Mine was a plug and play for both trucks. The trailer is a 2004 keystone.

 

IF you look closely at the cover that protects the pins, It has it written on there what each pin is. Just take the pic from your owners manual to the back of your truck and look at your pin cover, and the book to make sure they all match. You have to look really close at the cover, because it is written pretty small. Plus when I looked online for wiring on my old truck and this truck, I found that it is pretty much an industry standard on what each wire does no matte what kind of truck you buy.