Same problem with mine but when I pulled off the whole center dash with the radio and AC stuff, I unplugged the cig lighter (might work) and put a new fuse in and they started working. Very weird. I still don't know what the problem is but hey it's fine for the time being
65 Mustang coupe
306 H/C/I, holley 4 barrel, T5, Hurst Shifter, Subframe connectors, 8.8 w/ 3.55 posi, 4 piston front disc brakes, SN95 rear disc brakes, shelby drop, 620 springs, Mideye 4.5 Leaf Springs, bilstein shocks.