do they come up with the trailer switch? if no then it sounds like a relay problem, if it's both drives then have you had any wiring unplugged? maybe you have gotten the limit switch connectors mixed up with the indicator wiring or even the low drive oil connector.
Are we talking bravo drives here? if so there is a limit switch for trim built into one side of the drive and a sender for position on the other.
Another thing I have seen is that the wedge/spacer that goes behind the stud that slides through the back of the drive is put in on the wrong side causing a big change in the amount of trim available