can parasitic draw be caused by wrong bulb size?

[andrewpclayton]

OK I didnt have it like I thought.

when I disconnected the horn relay, I also had the external regulator disconnected so the reading went to 0

if when I disconnect the external regulator the reading goes to 0, is that indicative of a faulty relay?

I purchased a replacement external regulator and connected it, the reading went up to 2.35, so I put the old one on and we are still at .80
I did not however turn the truck on so maybe it didnt get a chance to "activate"?