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Deer Repellent Mod

Jersey Jim

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I finally got around to modifying my horn circuit a month or two ago on this new vehicle, as I have on my prior vehicles. It is my hopes that it will benefit others as it has for me. First let me start off by saying that on my 27 mile drive to work, that more than half of the miles take me through heavily wooded and unpopulated roads that are INFESTED with deer! I encounter 11 "problem zones" on the commute to my job that is literally "in the middle of nowhere". Very isolated. In fact, the last 7 miles is an access road that only the employees use. This goes right through the middle of a wildlife management area too. On my way home tonight I saw a pickup truck pulled over, with lots of debris in the road, and what looked like a deer on the pavement that literally "Exploded". My problem areas vary in length from 1 mile to 4 miles at the longest. After seeing this accident tonight, I felt compelled to share this with the group, and actually felt guilty for not. Do with it what you will. All I can say is that years ago I decided I'll never be without it. Have it on 2 vehicles right now.

The modification I built is quite simple. Once turned on, a 12-volt adjustable repeat-cycle timer "Chirps" my horn for a very short 50 milliseconds (adjustable). I have this set to repeat every 5 seconds or so (adjustable), almost about every 1/10 of a mile, more like every 3 telephone poles. I call it a "Chirp" because the horn is so brief, I think it's even shorter than a "key FOB chirp" when locking ones car. I often don't even hear it inside the truck, over the wind, road noise, blower and radio. It's not annoying by any means. It literally requires 3 wires... power, ground and one tied into the clockspring wire that gets grounded when the horn is pressed on the steering wheel. Our gen14s have easy access to this wire in the passenger kick-panel BCM. I have attached my wiring diagram of the 52-pin connector "J2" on the BCM, and what color the wire is (green/white, pin-18). Jpeg drawings of my wiring were too blurry, so until figure out how to post a clearer diagram, I've attached a PDF file which almost every computer can open. The diagram has the Timer mfgr & part number as well. Attached is a pic to this tiny timer connecting with 1/4" spade lugs.

Over the years I have seen countless examples how deer react to this chirp, especially when they are near the roads edge, thinking about crossing the road, and hear the sound getting closer. I have seen them freeze in place and the ears twitching like radar. Oncoming headlights simply don't give them a sense of something getting closer, but the sound gives them an entirely different sense of awareness. Actually I think just mere headlights confuse them. This has worked countless times in the daylight too. I refuse to have a vehicle without this modification. It gives me such peace-of-mind while driving in the dark in these 11 problem areas. Granted I have to switch it on 11 times on my commute, but until I got around to this vehicle mod, I had to smack the horn 175 times as briefly as I could on my way to work. Not a relaxing drive. This timer chirps short enough that I don't think I could duplicate it by hand. Now my drive if very relaxing.

I have one co-worker who has hit 8 deer over the years coming to work! And many more hitting several. Some ridicule the idea and say I'll wear out my horn, but I have years of proof to the contrary. Even if so, a horn every 6 or 7 years is still cheaper than a $750 deductible! Or a totalled vehicle.

Ford F-150 Deer Repellent Mod Repeat-Cycle Timer
Ford F-150 Deer Repellent Mod Timer Specs


Ford F-150 Deer Repellent Mod Overhead Console Switch 2


Ford F-150 Deer Repellent Mod Overhead Console Switch


Ford F-150 Deer Repellent Mod bcm 2
Ford F-150 Deer Repellent Mod F150 Deer Horn 3
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Iconic22F150

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Do you have any experience or feed back on those deer whistles you mount to the front bumper?
 
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Jersey Jim

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Sean, thanks for reviewing. Were you able to open my pdf wiring diagam below the pics? It's quite a simple interface.

I've looked at many scientific studies that tested the hearing range/response of deer and effectiveness of the horn whistles, and was not impressed with their findings, neither were those who conducted them. It is my observation that the "abrupt" warning is way more effective than something that is there faintly and gradually. Many studies showed the whistles to show absolutely no effect. I take comfort in the years of first hand observations to the effectiveness of this method. Many people at my job have the whistles, but we continue to have a huge problem with deer. I'm all for going with what's more effective.
 

Aron

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Sounds like you need one of these:

Ford F-150 Deer Repellent Mod 1673442023904


In all seriousness, the modification you came up with, with a constant chirping horn sounds like it works, but would be incredibly aggrevating to your neighbors if you forget to turn it off once you leave the "deer zones".
 

BHunted1

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Do you have any experience or feed back on those deer whistles you mount to the front bumper?
I had 2 of them on, didn't work. I just learn to not speed down those backroads. Not day or night. I even made some deer friends that see me coming.

:)
 

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Jersey Jim

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Surprisingly, the "Chirp" is so brief, and at speed you really can't hear it inside the house. I'm sure the neighbor would rather hear a chirp than a crash on their front lawn.:eek: and every 5 seconds where I have the "off-time" set, it never chirps in the same spot on the road. Maybe over the course of a couple weeks.
 

Iconic22F150

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@Jersey Jim I didn’t try to open it. I don’t have enough need to do the mod right now while I live in the “big city”. I do drive enough places to make those hideous whistles tolerable if they had worked.
@BHunted1 same here. I just don’t speed and drive cautiously on the country roads.
 
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Jersey Jim

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It's not about being able to speed. I'm usually the slowest one on the road. I drive 50 all the way to work. It's about the element of surprise. The only deer I ever hit in over 1 million miles was at 45 mph. He jumped out of a hedgerow alongside the road. I can't imagine anyone being able to stop in time for that kind of surprise, even at 35 mph.
 

Old Bear

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I can open PDF with no problem, but can't read anything. I'll try it on my laptop later. I am certainly interested in this.
 

Buyer2021

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In my area with large populations of both deer and feral hogs, the latter are as much if not more of a threat to drivers / vehicles. More often than not the hogs travel in running herds, crashing out of the woods and dashing across roads apparently mindless of their surroundings.

Just last week driving ~25mph on a gravel road a herd of ~20 hogs ran in front of me out of a creek bottom, I slammed on the brakes and stopped close enough that I lost sight of some of them in front of my hood. No contact fortunately but three of them fell in the resulting scramble, almost instantly regaining their footing and continuing, seemingly oblivious of the whole event.

I strongly suspect that the 'chirping device' (kudos for the development of that (y)) would have no influence on the hogs, but who knows .... ?
 

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Jersey Jim

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I attempted to add a wiring drawing pic with the other pics in the first post, but I can't seem to maintain image quality from a DWG. file to an image. The PDF file int the first post is the best quality but you'll have to open it.
 

Sneezy

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I had 2 of them on, didn't work. I just learn to not speed down those backroads. Not day or night. I even made some deer friends that see me coming.

:)
Dang I was hoping they worked, I just added some to my truck since I hit a deer a couple months ago. I laughed when reading the installation instructions (wondering if they needed to be mounted at a certain height) and the instructions said they do not work against deaf deer ?

Maybe the deer were just deaf and didn’t hear your whistles ?
 

notabot

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He jumped out of a hedgerow alongside the road. I can't imagine anyone being able to stop in time for that kind of surprise, even at 35 mph.
A buddy of mine got hit by a deer on his motorcycle, right in front of me. Nothing he could have done, that sucker shot out of the woods like a missile.
 
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Jersey Jim

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...Yes, once they are in herd/stampede mode it's hard to change their minds. But more often I've been lucky enough to see them standing and facing the road, contemplating when to cross.
 

notabot

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...Yes, once they are in herd/stampede mode it's hard to change their minds. But more often I've been lucky enough to see them standing and facing the road, contemplating when to cross.
This happened during hunting season and the deer was being chased by hunters...
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