2006 V6 amustang coup.
i have had it for 2-3 months.
i just tried the horn last week.
it did not blow.
opened power box to check fuse, and found horn realyvwas just laying there.
i re installed it, the horn worked as supposed to.
i tried the remote alarm button and hown also worked.
all was great,
next day my battery was dead.
so I pull the horn relay, booster start my Pony and all is well again.
i have the wiring service manual. There is not much in this circuit but when I plug in the horn real now the alarm goes off and I have to hit blue alarm button.
anyone have any input
horn relay out no drain, horn relay in battery drains. Going to be a long search

 

the CD players are notorious for draining the battery, fyi

 

i have no CD player.
battery is all right as long as I leave the horn relay out..
if I plug in horn relay battery goes dead.
tomorrow I will hook up an ammeter and plug in horn relay to start tracing it down.
It is mostly a grounding circuit through horn button circuit that pulles in the relay

 

my CD player drained my battery,
then drained my new battery lol

do u have water damage?
that's another issue that causes electrical buggaboo's

 

well fortunately this 2006 has not had any signs of water damage,
but I will pull off kicker panel and check SJB area as well.
only issue with this Pony I have had so far.
somehow I missed it when I bought this 60K mile 2006 beauty.
kenK