Commercial kits are available that just plug in. Check with a local auto parts retailer or a camper/rv trailer retailer. The kits are great and the whole job can be completed in about a minute.
Not all trucks are built with a trailer harness plug. If you can not find one, then your truck does not have one and you need to install one.
Check with your local auto parts store, they can sell you a trailer harness that simply plugs into your existing harness, very easy to do, just follow instructions. The harness should be in the $25 range.
Your local auto parts store can sell you a trailer wire harness for that vehicle that simply plugs in to the original harness and it is weather tight. It installs in minutes.
you do not need the extra 7 pin if your not running electri brakes
U-Haul sells a kit with instructions
very easy .I bought my wires on eBay ,,,the trailer harness plugs right into your lights no cutting at all
Problem with it is the ground wire wont hold a load on a trailor with more than two lights-----ground it yourself to frame
You have to buy a kit with relays goes on passenger side kick panel comes with trailer plug for the rear plug and play
Make trip to your local auto parts store. They have or can get you a harness that plugs in to your harness. No cutting, soldering or taping. The connections are weather proof. Should take you all of ten minutes to install. They average in price around $30. Can't beat it!
2006 Dodge Dakota - Where do i find the trailer wiring harness
Have you looked under the vehicle? I'd be surprised if the wiring harness wasn't already there and taped up under the vehicle. Barring that, most business that sell and install trailer hitches will also install trailer wiring harnesses. If you're a DIY, go to the local auto parts store and ask. They probably have the wiring harness you need all setup to plug into the manufacturer's wiring harness.
The easiest way is to buy and install a plug in wiring harness available at most parts store.