Power seat back tilt doesn't move, although the hydraulic motors engage.
Oddly, both left and right are doing the same thing... nothing. It is not
electrical as both hydraulic motors engage. More like the gear or shaft they
drive is stuck. I'm certainly no expert, but catch on quick. Just need a hint.
Also, if some of the hydraulic fluid has leaked out, what kind is it, and how do
you charge it. There appears to be a small fitting on the back end of the
motor, I would assume is a grease fitting.