[fintstone]

Once again...Did you try check if the horns were any different with the lights on as I suggested before?
I believe that your right front signal gets it's ground from the wire on the back of your right front headlight which is also connected to your right front parking light. It eventually also goes to your horn. I cannot believe your current problem and your original problem are not related, thus this is the logical place to start. First, put in the original flasher. Then try taking out the right front headlight fuse and see if the turn signal works with the lights on. If not, go back to the right front signal and unplug it. See if your left signal works with your lights on.