Recheck 'ALL' fuses under hood and on the dash, even if it seems that it can't affect that circuit! Best done with a test light on each side of each fuse.
Have fixed a BUNCH of elect. problems by just finding a bad fuse. Look closely on the dash fuse box with light some fuses are hard to see, easy to miss one! Is anything else not working, any lights say third brk. lamp, dome , cargo light ect. I have another possibility. - pushrod