I recently bought a '17 Limited w/31K mi. It is still under factory warranty and it is Chrysler certified. It does not have the factory tow package. I had U-Haul install a hitch and wiring. I pull a newer Aliner camping trailer with the standard 7-way round plug. I have turn signals and brake lights on the trailer, but no running lights. The trailer wiring has been checked 3 times and is O.K. I plugged another trailer in, it did the same thing. The van has been checked 3 times, and the wiring redone twice. With nothing plugged into the van everything works as it should, via a amp tester. As soon as I plug the camping trailer in to the van, the vans voltage reading at the plug drops dramatically, and I lose the running lights- actually they never come on at all. Sometimes I also lose the brake lights and turn signals after driving a while, pulling the trailer, but if I restart the van, I get them back. Camping World spent 2 hours on it, re-did U-Haul's wiring, and told me something is limiting the vans ability to power the trailer lights. I see that the Pacifica tow package includes a heavier duty 220 amp alternator- is it possible that the standard alternator is too small? I am at wits end- U-Haul and Camping World say the vans electrical system is at fault, our local Chrysler dealer is clueless. The van is great otherwise. Please help- I'm losing what little hair I have left!