Any tips for testing out the brakes already on my Coleman Taos? The prior owner claims to have never used them due to the small weight of the camper, but since I'll be towing with a smaller TV than they were, I'd like to get them to work. I thought that I could jack up one wheel off the ground - and tap into each wire going into the brake itself. Attach blue wire to positive of a 12V battery, and white wire to negative while spinning wheel by hand and I should feel the brake engage.....but I feel no difference. At worst, I'd need to get new electric brakes and drums, correct? I already know I'll need to get a brake controller for the TV and get that all wired up.