Do not need an answer any more. Mazda dealer replaced the complete seat mechanism for $931. Using a used car seat. It appears that the motors can not be replaced individually.
If they both don't work, check the fuse. Under the dash on the drivers side. Could be a problem with the master control switch on the drivers door? I've had to replace the window regulators and both door switches, one at a time, never both at the same time.
check Mazda forum. Answer is within
replace it
in the hand part where you close the door theres a screw, take it off, pull the assembly from the top by the window switches, when it comes out the wires will follow, disconnect the harness, and replace with the new power switch. (note this is the drivers side)
The door switch is bad. I have replaced the drivers side door switch on mine for the same reason.
The Mazda 626 turn signal relay switch can be found below the dashboard on the drivers side of the passenger compartment. The turn signal relay switch should be labeled as such.
The backup light switch is located on the left side of the transmission. Disconnect the switch connectors, then unscrew the switch.
It should be located in the trunk on the drivers/passengers side.
The 1990 Mazda 323 horn relay switch can be found on the front drivers side quarter panel. The relay switch will be on the inside of the quarter panel.
Generally whenever a switch goes bad the only thing you can do is replace it.
You must replace the entire control arm assembly with the ball joint included.
If it has a cabin filter, the drivers manual would show you where, when and how to replace it.