Re: 2004 smart junction box
My 04 did something similar when I first got it. Showed up to work and the horn went wild. I had to pop the hood and unplug the it. The relay shorted and fused closed. It is one of the relays in the kick panel on the passenger side, but I can't tell you exactly which one yet. (dealer warranty at the time) When I get to that stage of the tear down though I will pull to the side for you if you want it.
'04 3.0 xlt: thrown rod = dead.
Planned mods: 5.0 swap (got the donor already, it's nardly), 4/5 suspension drop(DONE), traction bars, 8.8swap, 3.55's w/LS . Auto to Manual conversion. Lots more in the works.