The weekend before last when I did my (still weak) horn upgrade I needed to tap into some 12v ignition switched power. Looking at my handy electrical book for the 80 I find the center diff relay in the drivers kick panel. 30 Amp will be fine to tap into and I really doubt that I would ever need to use the horn while in low range or center diff locked. The relay seemed to be the perfect place to tap in. Until...........I removed the kick panel and saw what I have managed to accumulate over the years...So I had to give myself one of these
and one of these
and decided I would take a different approach.
Sorry large picture....More detail....
Yomama

Sorry large picture....More detail....

Yomama