Kiara, welcome to our website and forum. We look for ward to reading of your adventures and experiences. Wiring in a brake controller should not void the warranty on your Jeep, provided it is done correctly. An 8' pop up trailer may not need a brake controller and some may not even come with electric brakes. If it has electric brakes on the trailer then I would recommend you have the controller installed. Good luck and enjoy!
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7