|
Intermittent Horn with Ignition Off
While working in the garage where my Cobra is, I occasionally hear a low, short sound from the horn. This is with the key off. It doesn’t do it very often, but it is definitely there. Everything on the car works perfectly.
What could be causing this? |
I've never seen a relay go flaky this way, so I'd suspect the horn switch/button (Lucas!) on the dash. Disconnect both the #11 wires from the switch and see whether the condition stops. Also, follow the pink wire from the switch to make sure that it's not being pinched somewhere.
|
By any chance did you name the car Christine?
|
Quote:
|
If the sound is so low it may be doing it when you are driving and you just can't hear it. That sounds as if it is getting a low voltage feed from somewhere. If the switch is good then check the hot lead to your horn and look for some place it may be touching a wire that is hot all the time just enough to let some voltage through. A relay sticking would normally let the full voltage through but that is another easy thing to check so don't ignore it.
Ron |
I have only heard this one more time after spending many hours in the garage. At this point I am going to wait until it gets more frequent before trying to find the problem.
Thanks to all for the suggestions. |
IMO, Ron61 is spot on.
The circuit is rather simple. Positive -> Horn Button Switch -> Horn Relay -> LOAD (Horns) -> Ground Negative Either the Horn Switch is bad and making an ON condition in the circuit OR the wire from the Horn Switch to the Horn Relay and then to the LOAD (horns) is somehow intermittently touching some other positive wire causing the horns to sound briefly. I would start with the Horn Switch. I would remove the Horn Switch and test it with an Ohm setting on your Multimeter. This Horn Switch is not very expensive if it is like mine. (a small push button on the dash). So you may want to just get a new one and replace that switch. It also could be a flaky Horn Relay? and/or the wire from the relay to the horns (33 Violet). |
| All times are GMT -7. The time now is 08:49 AM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: