It's the 12 volt accessory circuit for the trailer wiring fuse and/or relay that is bad on your Ford truck. Or it's possible the circuit isn't complete which you could do with 10 gauge wire like part # 10-1-1 (sold by foot) through a breaker like # 9510 from the 1:00 pin of the 7-way to the positive post of your vehicle battery. view full answer...
Though it will ultimately depend on the size of your current shackles, typically when someone is upgrading to the Road Armor Shock Absorbing Equalizer Kit # LC696740, I recommend also getting the Lippert AP Kit - Tandem Axle Road Armor Wet Bolts and Shackles # LC52SV. This has wet bolts to keep everything from seizing up and beefier 1/2" thick shackles that measure 3-1/8" from center of bolt hole to center of bolt hole. This will usually be perfect for just about anything and everything.
However,... view full answer...