This museum is reached from inside Karnak Temple itself. You are required to buy a separate ticket for it once inside the main complex.
After you enter between the lines of sphinx and go through the first pylon you are in a main courtyard. Follow the signs for the toilet to the left, pass out thro’ an archway and you come to the ticket office for the museum..

They have finished re-building the White, Red and Alabaster chapels.

Others are in progress and they are also putting statues found in different part of Karnak on plinths.

Other Karnak articles are at Temple of Karnak and Changes to Karnak Temple