remember me? Been busy.. busy busy
The one thing that I wonder about is both seats are doing the same thing. It'* doubtful both motors could be having a problem on both seats.
Here'* the underneath of a seat.
We can see the motors, and the green and blue cables..those are the drive cables. The motor drives the cable and the cable drives the actuator gearnut. I would think maybe the switch was an issue, since you guys say you can hear something trying..it can't be the problem.
If possible I would test power from the switch, through the relay and right to the motor. That will resolve if power is getting there or stopping at a bad relay. Then disconnect the drive cable and see if the motor turns it freely. From there all that would be left is the actuator gearnut....but like I said..since both do it....I suspect something that controls both seats. Therefore I'd think electrical before the motors.