switched

I'm looking for opinions. I finally mounted my Wolo Bad Boy air horn. I tried to run jumpers from the stock horn to the Wolo, but there just isn't enough juice to make it work. The ground side is switched for the stock horn which in my opinion is unusual. I need a switched circuit to tie into...

This is what's happening with my 89. I've been fighting this for a week now. The fuel pump relay basically controls and directs when the fuel pump operates. There are only 5 inputs / 1 output. 1. A hard ground. (input) 2. Power to the relay when switched to reserve. (input) 3. A ground...