[jhow66]

Your horn should not be your battery drain as all it the parts in wheel does is to make a ground for horn relay which then sends power to horns. If is was grounding your horns would blow all the time. Try this to find your battery drain--disconnect your ground cable at battery--hook a test light between battery cable and battery post--if there is a drain the light will glow--pull fuses one at a time until light goes out--when it goes out your battery drain is in this circuit which will make it easier to find. Hope this helps.