Need some guidance

[Shon]

In my attempt to install an inertia brake controller on my 71.
I have it all wired up but when connected to trailer, the green light burns but touching brakes the light goes out OR if I turn on either turn signal it blinks.
I obviously tapped the wrong wired at the brake pedal, I hit the WHITE wire that goes to the plunger 'thing' on the brake pedal, which I thought this is what tells the rear brake lights to work. But it gets better....
I decided I wanted test the plunger so I began to remove the connection, it's a tight fit between it and the steering column, I pull it and end up bending slightly the little copper looking "metal tabs" and ends up hitting some metal and sparking therefore blowing the tail light fuse. So I replace that and try to put it all back together and then get my 4YO to tell me of the brake lights work, NO he says, but the turn signal does work.

I do not know if I have messed up that connection on the plunger or if at the same time my tail light burnt out, I knew I had one out, but by chance could both burnt and are they dual element bulbs b/c turnsignal works....just no brake lights now. I thought that with the plunger thing reassembled the lights would burn when I depressed it or just the opposite...anyway, no brake lights after removing the plunger, any thoughts?