www.tdiclub.com

Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2014 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You



Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI 101

TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

Reply
 
Thread Tools
Old July 24th, 2011, 18:08   #1
mkluk
Newbie
 
Join Date: Jun 2007
Location: Bethlehem, PA
Default Replaced battery, horn won't stop blowing

Hey folks,

This problem is different from the "alarm horn" problem that I've read about. It is just one long solid honk. Not just one small little honk (which is supposed to happen when you reconnect) but a long assed BLOW HONNNNNNK which never stops. Scared the hell out of me b/c it never happened before and I got spark when there was connection... thought I electrocuted myself! Would have been really funny for anybody watching.

This is weird, and I've done some research with no luck finding an answer. I replaced my battery today, disconnected negative then positive, put new battery in, connected positive then negative. Battery was from NAPA.

I have a 2000 Jetta TDI. It is parked on a slope if that matters.

Since I'm in a neighborhood with no garage, I disconnected immediately. Is there any way to disable the horn while connecting the battery, then starting the car, then enabling the horn again? Or, is there a way to stop the horn immediately after connecting? I thought maybe starting the car would stop it, which is suggested for the alarm going off when reconnecting the battery. Haven't tried that yet though because it is officially night time where I am.

Thanks...
-J
mkluk is offline   Reply With Quote
Old July 24th, 2011, 21:41   #2
Ol'Rattler
Veteran Member
 
Ol'Rattler's Avatar
 
Join Date: Jul 2007
Location: Marysville, Wa.
TDI(s): 2006 Jetta
Default

Don't know if this applies, but on my A3, when reconnecting the battery, I had to lock the car and then lock the car with the key to turn off the alarm.
__________________
2006 Jetta TDI
5 speed, Manufactured 06/06
DC stage 1 SMF Clutch
Draw-Tite hitch
Dash Tray
Blue tint aspherical mirrors
Euro Cupholder
Euro Light Switch
2nd grocery hook
VCDS Hacks: DRL Disabled-Seatbelt Chime Disabled-Key fob Power Windows
Adjusted Cam to Crank Timing
Ol'Rattler is offline   Reply With Quote
Old July 26th, 2011, 09:51   #3
Corsair
Veteran Member
 
Corsair's Avatar
 
Join Date: Aug 2003
Location: Auburn, New York
Fuel Economy: 52/48/??
Default

I work in the electrical / electronics trade, but didn't reply to this because frankly I'm stumped. I'm going to assume the car was fine, driveable etc. and for whatever reason the battery failed or was decided to replace, and on installing the new battery, the horn blows constantly....
=
I agree with Ol'Rattler- try cycling the lock etc.
Does the car have any aftermarket alarm we're not aware of ?
=
My next move would be to consult the Bentley manual, look at the schematic, see what operates the horn. Maybe there's a "horn" fuse that could be pulled, but that's probably not a good long term solution. Reasons are because there might be other equipment you'd like to have use of... on that same circuit. Also, the horn is typically operated by a relay, and that relay itself draws some electrical current just to turn the horn on. Point is- even if you disconnect the horn or pull the horn fuse, the relay might still be triggered on, and that could drain the battery over the course of a day or two or three. Someone will need to trace the wiring diagram and use a Volt meter to figure out what is causing the horn to blow. If it's the car alarm, I'm not sure whether it would allow the engine to run or not.
=
You appear to have one of those "interesting" electrical problems, in the same way that a root canal is "interesting". Wish you all the best, and please do report back what is the outcome.
__________________
Best Regards.... Corsair....
2002 Jetta GLS TDI 5-spd 325Kmi, 2014 JSW TDI 6M
2004 Jetta GL wagon 2.0L (gas) 5-spd (sold)
[also had 03 TDI GLS 5spd wagon bought new, sorely missed]
Corsair is offline   Reply With Quote
Old July 26th, 2011, 10:05   #4
DanG144
Veteran Member
 
Join Date: Aug 2007
Location: Chapin, South Carolina, USA
Default

Try having the key in the trunk lock? or door lock when hooking the battery back up.
DanG144 is offline   Reply With Quote
Old July 26th, 2011, 11:51   #5
neljoshua
Member
 
Join Date: Oct 2008
Location: Lafayette, IN
Fuel Economy: 47 mpg hwy
Default

Corsair, you might be on to something.

I have seen relay springs in VWs that have broken such that something is always on.

I do not recall right now where the horn relay is, but that is where I would start. It is possible there is something in the relay that is broken (corrosion, broken spring, etc) that is causing the contacts to stay closed.

mkluk, since you say it is parked on a slope, this may actually have something to do with it as well.

Does anyone know if the 2000 Jetta has a tilt sensor on the alarm system? Is it possible this is triggering since it is on a slope?

Since it is a long blast of the horn rather than the alarm, I would think it is a relay problem rather than an alarm problem. I have seen a number of relays (turn signals, horns, starters, etc) go out for different reasons. Usually, they can actually be fixed, if you know a little bit about relays.

Josh
neljoshua is offline   Reply With Quote
Old July 26th, 2011, 18:48   #6
Corsair
Veteran Member
 
Corsair's Avatar
 
Join Date: Aug 2003
Location: Auburn, New York
Fuel Economy: 52/48/??
Default

Again I learn something good from another poster here- I never thought about that...
If it was an alarm activating, the sound would likely be pulsing BLAH- BLAH- BLAH-
But since it's constant, that may point AWAY from the alarm as a cause.
Good thinking!
__________________
Best Regards.... Corsair....
2002 Jetta GLS TDI 5-spd 325Kmi, 2014 JSW TDI 6M
2004 Jetta GL wagon 2.0L (gas) 5-spd (sold)
[also had 03 TDI GLS 5spd wagon bought new, sorely missed]
Corsair is offline   Reply With Quote
Old September 19th, 2011, 18:25   #7
kenmaira
Veteran Member
 
Join Date: Jan 2011
Location: Austin
Default

just replaced my glow plug harness (will post pics soon) and now I have the same problem, ideas?
__________________
VAG-COM owner
2001 GL, Stage 2 Clutch, Lightweight Flywheel, Dieselgeek Racepipe, Titan 764's (.234) Ceramic brake pads, 11mm Injection pump IN! 10/30/2011, Bilstein TC Sports front & back!
kenmaira is online now   Reply With Quote
Old September 19th, 2011, 19:09   #8
kenmaira
Veteran Member
 
Join Date: Jan 2011
Location: Austin
Default

OK, for those who are looking, the way to turn it off is to just turn the key over after you re-attach the battery
__________________
VAG-COM owner
2001 GL, Stage 2 Clutch, Lightweight Flywheel, Dieselgeek Racepipe, Titan 764's (.234) Ceramic brake pads, 11mm Injection pump IN! 10/30/2011, Bilstein TC Sports front & back!
kenmaira is online now   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
'04 1.9 golf Won't start after blowing fuse jgtuk VW MKV-A5 Golf/Jettas 15 July 6th, 2009 08:54
alarm horn replaced but still weak ? vwluca VW MKIV-A4 TDIs (VE and PD) 3 March 8th, 2009 03:35
Beetle horn spontaneously blowing -- at 5 AM EddyKilowatt VW MKIV-A4 TDIs (VE and PD) 7 February 17th, 2009 14:39
Won't start, horn honks too gnode TDI 101 13 November 26th, 2007 09:05
horn is blowing, i'm not pressing it Jack_Berry VW MKV-A5 Golf/Jettas 6 December 5th, 2006 16:42


All times are GMT -7. The time now is 15:47.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2014
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2013, All Rights Reserved
Page generated in 0.15188 seconds with 10 queries
[Output: 86.01 Kb. compressed to 74.19 Kb. by saving 11.82 Kb. (13.74%)]