seem to be having an issue with my trim tabs; curious if anyone has encountered the same. when you press the rocker switch for bow down the hydraulic unit runs but then seems to make a noise as if it is bound up. seems to be the same for both sides. however if you jump out the rocker switch the tabs will operate. so I went out bought a new rocker switch, wired up and back to square 1 tabs won't operate........any thoughts. thanks.