The brown wire does have power and it shuts the light out. I still think there is afusible link problem. There may be two that run off of the starter but onemore in the harness running down the intake to the alternator. If you can't find it have a pro look at it. And make sure your battery is in good shape even if it is new, doesnt' mean it's good. Autoparts can test it. But I really think you have short in system causing your problem due to age. Either that or your fusible links are hanging on by one or two strands and don't let the power go through them like it shold and causes this.
Saturday, October 4th, 2014 AT 5:38 AM