Replaced battery, horn will not turn off - 2003-04 Mach 1 Registry Owners Club

davecrazy · 07-09-2015, 08:58 PM

So my car has been sitting for a year plus. Decided to get it in running condition.

First step is to replace the battery.

Got the old one out and the new one in, as soon as I touch the red terminal the horn goes off and will not turn off no matter how much I push the buttons on the key FOB, turn the key in the ignition, or hit the lock/unlock door buttons inside the door.

Only thing I can do is disconnect the battery.

Changing the oil is about as in depth as I get mechanically, so I don't have much an idea where to stop troubleshooting.

canadianmach1 · 07-09-2015, 09:50 PM

did you try starting it and then turning it off ? also are you sure the battery in your key fob is good ?

96gt02 · 07-10-2015, 08:06 AM

Is this on a mustang or another car? Have you mess with the airbag on the wheel at all? I had a similar thing happen to me when i changed my clockspring and overtightened the airbag/horn it would just stay on until i adjusted it better

TKat13 · 07-10-2015, 12:12 PM

Is the horn in a solid 'honk' or is it the alarm 'Honk' - 'Pause' - 'Honk'? If solid, try repeatedly pressing the horn on the steering wheel. Maybe the contacts are stuck.

common for the clock spring to fail; I have already replaced mine. Took about an 1.5 hours; but I was just casually working. It can be done much faster. Need a steering wheel puller and basic hand tools. I first watched a youtube video.

Mach351 · 07-10-2015, 02:44 PM

cars are like women when you don't pay attention to them for too long -
they both get a little pissy when you finally get around to taking them out for some fun.

07-09-2015, 08:58 PM	#1
davecrazy Registered User Join Date: Aug 2002 Location: Bayonne, NJ Posts: 174	Replaced battery, horn will not turn off So my car has been sitting for a year plus. Decided to get it in running condition. First step is to replace the battery. Got the old one out and the new one in, as soon as I touch the red terminal the horn goes off and will not turn off no matter how much I push the buttons on the key FOB, turn the key in the ignition, or hit the lock/unlock door buttons inside the door. Only thing I can do is disconnect the battery. Changing the oil is about as in depth as I get mechanically, so I don't have much an idea where to stop troubleshooting. __________________ DSG 03 Mach 1 - ordered May 16 2002. 447220 sleeping in the garage

07-09-2015, 09:50 PM	#2
canadianmach1 Registered User Join Date: Mar 2005 Location: edmonton canada Posts: 765	Re: Replaced battery, horn will not turn off did you try starting it and then turning it off ? also are you sure the battery in your key fob is good ? __________________ mods, bbk longtubes, bbk xpipe , slp powerflo catback, EMP Stewart water pump, h&r springs , tokico adjustable shocks, php spacer, 4drilled/slotted rotors, , vortech with air/air, Anderson powerpipe, cobra tank/pumps, ford racing t56 6spd, mgw shifter,center force clutch, 410 gears , moser axles, ford racing carrier ,steeda alum lower control arms ,cobra bumper , and mirrors

07-10-2015, 08:06 AM	#3
96gt02 Registered User Join Date: Nov 2011 Location: Jersey Posts: 442	Re: Replaced battery, horn will not turn off Is this on a mustang or another car? Have you mess with the airbag on the wheel at all? I had a similar thing happen to me when i changed my clockspring and overtightened the airbag/horn it would just stay on until i adjusted it better __________________ 03 Mach 1 JLT Next Gen CAI (fenderwell), VAP 5/8 Plenum Spacer, 10" Ported Short Runner Intake (Roy), Bassani Mid Length Headers, Bassani O/R X Pipe, Mac 3" Catback, March Fluid Dampener, Hydro-boost and WP Pulleys, FRPP Aluminum DS, Ported Throttle Body, 4.10 Gears, 315/35/17's Tuned by Wicked Motorsports

07-10-2015, 12:12 PM	#4
TKat13 Mach-T Join Date: Jun 2004 Location: DFW Posts: 2,865	Re: Replaced battery, horn will not turn off Is the horn in a solid 'honk' or is it the alarm 'Honk' - 'Pause' - 'Honk'? If solid, try repeatedly pressing the horn on the steering wheel. Maybe the contacts are stuck. common for the clock spring to fail; I have already replaced mine. Took about an 1.5 hours; but I was just casually working. It can be done much faster. Need a steering wheel puller and basic hand tools. I first watched a youtube video. __________________ Darrell Black '04 Mach 1 Track Times (bone-stock w/drs):60 ft - 1.90 \| 1/8 - 8.67 (100 shot,E85,4:10s,Street tire):60 ft - 1.67 \| 1/8 - 7.88 New build - 750rwhp; not track tested (yet) Mods: Build Log Paint&Body Tuned by Manny @ HPP

07-10-2015, 02:44 PM	#5
Mach351 Psycho Dog is Psycho Join Date: Sep 2008 Location: Lewisville, TX Posts: 1,990	Re: Replaced battery, horn will not turn off cars are like women when you don't pay attention to them for too long - they both get a little pissy when you finally get around to taking them out for some fun. __________________ Firefly: opening scene of Serenity - This Land Firefly: Out of Gas - Don't Be Afraid

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