Ramzi,

* Check the wiring and verify that the smart driver output is not shorted
on -Batt.
* If, even when disconnecting the wire from the connector PIN, the
output maintains a low value then the problem is inside the module
and the smart driver is probably damaged.
With the Smart driver open, no signal reaches
the PIN (XA1-2) of the electromagnetic brake.

Need to verify three connections. Pins 3 of the controller should have 24 volts coming in. Pin 2 should have 18 to 24 volts going to the brake and pin 4 is the negative signal to release the brake. Check pin 2 and 3 for voltage with key on. You may have to pull handle down in operating position to see voltage. If you have voltage at 3 but not 2, possible smart module has failed. Make sure all connections are clean and tight. Complete ohm checks all wires. Good Luck