The relay is responding to the signals (i can hear it click) but the actuator will only turn one way. it cant be the relay signal since its responding and it cant be the actuator since the current must flow through both wires to complete the circuit.
There's one relay for extend and one for retract.
So.....
The relayS ARE responding to the signals (i can THEM click) but the actuator will only turn one way.
Your hearing both relays click?
Then one relay contact maybe burnt...thus preventing a circuit.
 it cant be the relay signal since its responding and it cant be the actuator since the current must flow through both wires to complete the circuit.One relay is not working