How do i fix the horn in my 2010 jeep wrangler sport unlimited? it does not work
the horn button is dead< and the sounds from horn via the antithieft system is dead too? (mine are defeated on fob clicks, by me.,,)
on my car only the driver can honk. horn.
does car run perfect (other shoe drops) Head lights. not dim
cluster battery lamp not showing charge system failure?
first check fuses , the one labeled horn is top choice.
on mine, its fuse m22 and m23
in the underhood.
Totally Integrated Power Module oi TIPM
did you sCAn it after fuse, if the PCM sees errors to the TIPM above
that can in fact make lots of things fail. so Scanning is always #2.
if you see comm errors,. you will not fix this. get it serviced.
or reset every thing and pray.
my wranger has 2 horns, so its near impossible for both to fail .
(actual horn) but there are many submodels of wrangler and was not stated in your post which one, mines an X.body 2 door.
you can do 2 things, to cars, gue$$ or tests. and danger (air bags)
what do you want to do?
you dont need us to guess. right? our guess is as good as dice roll.
use a voltmeter (walfart $10)
touch the black meter lead to base, of horn (this is called ground)
then the other meter red lead to the horn pin.
honk the horn. if its not 12vdc now, then the problem is up stream.
move the black lead to the car body and keep red same.
and bot 12v now? yes, then the horn base is rusting clean it.
ok got 0v, again? its upstream. problem .
the horn systems are now complex , no more just 3 parts.
switch, relay and horn. ,
it now is digitally controlled. , that is correct.
the horn switch is a digital. device. ONLY.
Flow of logic:
the horn switch closes.
the 2 wire close and goes to the dash cluster controller. (brain)
this brain sees the switch closes and sends a CAN-buss network
serial command (called comms) to the TIPM
the TIPM then sends 12vdc to the horns, via fuse 23.
m22 is right
m23 is left horn fuses
on mine the relay can not be changed,
open the TIMP box, mine is hinged to front, dumb idea if ever.
the under that lid are all fuses names and relay names.
the words like like micky mouse wrote them , weak, and blurry.
on mine, there is no horn relay. (must be a high power transistor driver in the TIPM electronics board.
so now lets play dealer or ASE shop. just one example.
he sees all horns dead, full time. all ways from sunday.
he checks fuse m22, m23.
when honking, the horns do not get 12vdc to them.
he hot wires one horn (disonnected) it honks loudly.
ok horn is good.
he then checks with his scan tool that the horn switch is in fact working and sees the CAN-buss sends out the command.
to honk, it does.
but why does it not honk, ?
he then checks TIPM programming to make sure its not scrambled.
it\'s not, so the TIPM is bad.
he pulls battery neg (oops lost nav and radio codes ! read FSM on this)
and then removes the TIPM and puts it back reseating it.
and retests. it fails. (hope and luck can happen)
but it didnt.
the TIPM is bad.
how is that.?
Oct 06, 2014 |
2010 Jeep Wrangler Sport