I didn't make it!
the republic ship has docked ive taken the codes what now? i dont get what i should do now
After you got the codes from the Harbinger bridge, u have to go through the door that leads to the crew quarters. (these are the dormitories where the Republic soldiers sleep). There's also a medical bay there. Somewhere in that module there is your room, and the door to ship's inner workings. You have to go through the ship's engine back to the Peragus fuel line. (Trust me, you'll know when u come to the engine.) Before that, in the beginning of that module, Kreia will tell u to continue on without her while she goes to fight Darth Sion. U have to find a way back to the Ebon Hawk through the Peragus fuel line.