No, I have not because all the other seat functions (up/down/tilt) work. I have been assuming a single relay provides 12v to all the motor switches. If each motor has a separate relay then your suggestion is a good one. If this is correct, where is the forward/back motor relay located?
Do you know which connector goes to the forward/back motor? Knowing this might allow bypassing the switch and apply 12v directly to the motor.
Thanks,
Jack