That's it.

It may be, but only back to the splice box on the rear of the frame.
Download the wiring diagrams from http://www.dodge.com/bodybuilder for
specifics on the wires, splice locations, etc.

Don't know if they're similar, but I have a 2004 Dakota without the tow
package. On mine, the 4 wire connector under the dash had all the wires
I needed to connect to the Protege Dodge adapter, but the blue wire did
not go all the way to the rear. On mine, it went to a connector just
behind the left front tire on the wheelwell, a multiple wire connector
that had more wires going into it than coming out of it. (I assume if
you had the tow package, a different wiring harness would have been run
from the front to the rear with the blue wire included). I simply ran a
blue wire from the connector on the wheel well to the rear 7-pin tow
connector and the brakes work fine. If you get the plug-in adapter from
Protege, then you don't have any additional wiring under the dash, just
plug one end in the brake controller and the other in the flat 4 brake
controller connector that Dodge supplies under the dash (mine actually
had a tag that said "brake").
On the rear, you will need a 7-pin plug, but will also need to run the
blue electric brake wire as noted above.  Some 7-pin plugs are designed
to plug into the 4 wire plug at the rear, so you have those 4 out of 7
wires connected simply by plugging it in. The blue wire will be the 5th
wire of 7, and you'll have 2 slots left for future use; one for charging
the trailer battery, and I can't recall what the other one is, but I
don't use it on my pop-up.
A previous poster showed a link to Dodge wiring. That's what I used to
find where my wires ran.

John

Go to Walmart in the RV section and buy a Hoppy plug in harness and
you're done.