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"How to - Horn All of the Time"

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Old 09-07-2009, 11:22 PM
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Smile "How to - Horn All of the Time"

Me So Horny mod!

Now that I have yer attention!
One of the things I wondered about our cars is why the horn doesn't operate unless the ignition is turned on. Well wonder no more! I have a solution!
This is NOT for the faint of heart as it involves pulling out the relay control module (RCM) and involves cutting circuit board runs and soldering.
If you haven't tucked yer tail 'tween yer legs and left by now, read on.

1. Disconnect the battery
2. Remove the cover that contains the RCM and pull the RCM out.
3. Disconnect all plugs from the RCM.
3. Remove the protective cover from the RCM.
4. Using a razor blade or exacto knife (I now use a Dremel tool), cut the circuit board runs as depicted (exactly!) in the photo below.

5. Solder jumper wires as shown in the photo.






6. Re-connected RCM.
7. Connect battery.
8. Push horn "button" to see if you did it right.
9. Put that $hit back together!
 

Last edited by tighed1; 06-11-2021 at 05:11 PM.
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Old 09-07-2009, 11:44 PM
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Default re: "How to - Horn All of the Time"

OK, You did a great job on the write-up and an excellent pic as well. Thanks for your time and effort, really!

But why would you need your horn to work with ignition off, just curious.

James
 
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Old 09-08-2009, 12:13 AM
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Default re: "How to - Horn All of the Time"

that exactly part scares me. idk if im up to the task
 
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Old 09-08-2009, 01:10 AM
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Default re: "How to - Horn All of the Time"

The cut on the left isn't critical. The one on the right NEEDS to be just to the left of the solder joint. If you go too far left you won't separate the circuit properly.
 
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Old 09-08-2009, 01:19 AM
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Default re: "How to - Horn All of the Time"

Originally Posted by James1549
But why would you need your horn to work with ignition off, just curious.
Well, first off every car I've ever had (A LOT) the horn was always there for use without the key.

Let's say you are in a parking lot just sitting in the car when you notice someone starts to back into your car! HURRY! Put the key in and turn it so you can alert the other driver!

Or let's say yer name is FP and you see some chick that you would like to beep a little. Sorry! Can't do it unless the key is in and on.

I was waiting to take my son some place and told him to go get the car key. Of course he took forever and I pushed on the horn to hurry him along. Opps! Forgot. Gotta have the key in and on for the horn to work!
 

Last edited by tighed1; 01-29-2010 at 08:25 PM.
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Old 09-09-2009, 12:15 AM
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Default re: "How to - Horn All of the Time"

I agree with the need to have the horn working without the key in, but have you checked to see if this draws the battery down when the key is removed? Or is the source keyed to the ignition?

 
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Old 09-09-2009, 09:06 AM
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Default re: "How to - Horn All of the Time"

Yep, checked it. Relay is now hot but the circuit remains open waiting for the ground contact from the horn button. No drain.
Thinking about making the Cig Lighter hot at all times also.

Also thinking about trying the key fob Radio Shack Beep mod hooked up through the horn. Just to see how it sounds when you lock/unlock the car.

Anybody with me on this???
 

Last edited by tighed1; 09-09-2009 at 11:08 AM.
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Old 09-09-2009, 10:46 AM
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Default Re: "How to - Horn All of the Time"

Nice work!

Those look like cold solder joints, though...
 
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Old 09-09-2009, 10:49 AM
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Default Re: "How to - Horn All of the Time"

Can we do this with the cig lighter? I can't never charge my phone when the car is off.
 
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Old 09-09-2009, 07:26 PM
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Default Re: "How to - Horn All of the Time"

Interesting modification. How about doing it for the Homelink garage door opener?
 
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Old 09-10-2009, 12:07 AM
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Default Re: "How to - Horn All of the Time"

Originally Posted by bigbengt67
Interesting modification. How about doing it for the Homelink garage door opener?
I'll put that on my list!
 
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Old 09-10-2009, 08:53 AM
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Default Re: "How to - Horn All of the Time"

Tighed, I like the mod, especially now that it is evolving. However, I do not like the fact that the name of the thread was changed when it was stickied- it was pure literary genious LOL
 
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Old 09-11-2009, 09:50 AM
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Default Re: "How to - Horn All of the Time"

Yeah that title was pretty good if I do say so myself!
I asked that the title be changed so that it would draw the proper attention, not just dirty old men!

For those that missed it the original title of this thread was,

"Me so Horny or How to keep her Blowin' even when she's Turned Off!"

Get it? The horn works all of the time. Anyway, I thought it was funny!
 
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Old 09-11-2009, 09:58 AM
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Default Re: "How to - Horn All of the Time"

Originally Posted by bigbengt67
Interesting modification. How about doing it for the Homelink garage door opener?
This one you might want to leave alone. It's a security feature. You don't want someone breaking into your car to open your garage and empty it out.
 
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Old 09-11-2009, 11:00 AM
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Default Re: "How to - Horn All of the Time"

I thought about that also. Then I considered that most have a remote for the garage in their car (not built in like ours) that can also be stolen, dropped, misplaced and then the garage emptied, etc.
For some having the HomeLink hot all of the time would be a convenience.
I'll post a How-To and let folks decide if they want to "install" the mod or not.
Will also attack the Always on Cig Lighter this weekend.

Maybe I will title it, "How to keep her HOT all of the time!"
 
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Old 09-11-2009, 11:40 AM
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Default Re: "How to - Horn All of the Time"

Originally Posted by tighed1
Maybe I will title it, "How to keep her HOT all of the time!"
LMAO, good one...
 
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Old 10-26-2009, 11:40 AM
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Default Re: "How to - Horn All of the Time"

Updated original post.
 
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Old 09-06-2010, 01:27 AM
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Default Re: "How to - Horn All of the Time"

Originally Posted by tighed1
I thought about that also. Then I considered that most have a remote for the garage in their car (not built in like ours) that can also be stolen, dropped, misplaced and then the garage emptied, etc. For some having the HomeLink hot all of the time would be a convenience.
I have a thing on my bike called Flash2Pass - flick the brights twice & my garage door opens. You can install it in a car too. Cool thing is, no one knows it's there.
 
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Old 09-07-2010, 10:44 AM
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Default Re: "How to - Horn All of the Time"

Originally Posted by Joliet John
I have a thing on my bike called Flash2Pass - flick the brights twice & my garage door opens. You can install it in a car too. Cool thing is, no one knows it's there.
You ever worry about neighbors seeing this repeated behavior and catching on that all they need to rob you is a flashlight? LMAO
 
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Old 09-07-2010, 11:13 AM
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Default Re: "How to - Horn All of the Time"

Originally Posted by BoilerUpXFire
You ever worry about neighbors seeing this repeated behavior and catching on that all they need to rob you is a flashlight? LMAO
No. I do laugh to myself that someone might try it and not understand why it doesn't work though. There is a module on my bike, hooked into the headlight wiring. The module on my bike sends a signal to a module in the garage. Even someone else with Flash2Pass can't open my garage door, just as same brand garage door opener remotes don't work on your neighbors opener.

The module on the bike (or in the car) can really be hooked into anything - you just need to send power to that wire twice to activate it, so, technically, you could hook it into your brake lights, wipers, whatever... you could even rig up your own switch that doesn't do anything else.

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