When I push the recline switch backward and forward there is little click noise comes from seat and doesnt reclines back or forward. I think there is a motor to recline seat may be fixed. Other seat slide button(6-way) is working perfect.

How can I fix this problem.? Do you think it is harness or gear problem?

 

Your description suggests a faulty motor. There is only the power through a fuse, switch, and motor in the circuit.

Seat must be removed to access connector and supply direct power to test the motor. If motor runs w/ direct power, then switch is dirty or faulty.

A shop manual (automanualsource.com for $22) is a wise investment if you intend to DIY.

good luck