Hi I have a 2008 Jayco Jayflight travel trailer, at first I thought I had problems with my brake controller but I tested the wires & they seemed fine. I set the brake controller using the directions & after moving the manual level all the way to the left the camper brakes come no where close to locking up, my adjuster is up as high as it can go. Could it be I might need to adjust my brakes or maybe my magnets are bad? Any suggestions on which scissor jack is the best, I need to buy a new one. Thank you.