Try listening with your ear close to the tweeter to make sure that they are working. A toilet paper tube, with or without paper, helps. If they are not working check the fuse.
If you have a multimeter put it in the ohms mode, and measure the fuse removed from the holder. It should be close to 0 ohms, then with the fuse out measure between the tweeter terminals it should be around 6 ohms.
If the caps are the right values, in the right places and correctly soldered they are not likely the problem.
Charlie Conger