Flickering or pulstating Headlights

Ok just want to make sure I got this straight. (to many blues wires, im getting a little confused)

Superchargeddrt's diagram looks like I should tap into the blue wire (after the ballast) on its way to the field connection on the alt.

67Dart273, sounds like what you're saying is cut the blue w/white tracer right after it comes through the bulkhead, use the bulk head end to trigger the relay, and connect the relay output to the other end of the blue /white that I cut, then it will go to the ballast and on to the field connection on the alt.

So, which is right, or will it work either way.