Loss of power when activating horn?
Forum rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules
-
Jonah D'Avella
Topic author - Posts: 686
- Joined: Mon Jul 27, 2020 8:00 am
- First Name: Jonah
- Last Name: D'Avella
- * REQUIRED* Type and Year of Model Ts owned: 1926 Touring
- Location: Kingsport TN
- Board Member Since: 2020
Loss of power when activating horn?
I hooked up a MAG horn 2 my 26 Model T. I connected the horn's body to ground and the terminal to a switch and then to the Magneto. When I ran the car on a MAG and turned on the horn, the engine died. What am I doing wrong? Is the horn taking too much of the Magneto power?
-
Dan Hatch
- Posts: 4144
- Joined: Tue Jan 08, 2019 7:31 pm
- First Name: Dan
- Last Name: Hatch
- Location: Alabama
- MTFCA Number: 49974
Re: Loss of power when activating horn?
Post a picture of your horn.
-
Jonah D'Avella
Topic author - Posts: 686
- Joined: Mon Jul 27, 2020 8:00 am
- First Name: Jonah
- Last Name: D'Avella
- * REQUIRED* Type and Year of Model Ts owned: 1926 Touring
- Location: Kingsport TN
- Board Member Since: 2020
-
DanTreace
- Posts: 3327
- Joined: Sun Jan 06, 2019 10:56 am
- First Name: Dan
- Last Name: Treace
- * REQUIRED* Type and Year of Model Ts owned: '23 cutoff, '25 touring, '27 touring
- Location: North Central FL
- MTFCA Number: 4838
- MTFCI Number: 115
- Board Member Since: 2000
- Contact:
Re: Loss of power when activating horn?
Guess is the horn's coil is bad and grounds out causing a direct short, taking all the AC current to ground.
Remove the cover and test the coil for conductivity at the terminals.
Remove the cover and test the coil for conductivity at the terminals.
- mag horn cover7.jpg (83.02 KiB) Viewed 2546 times
- mag horn coil .jpg (86.15 KiB) Viewed 2546 times
The best way is always the simplest. The attics of the world are cluttered up with complicated failures. Henry Ford
Don’t find fault, find a remedy; anybody can complain. Henry Ford
Don’t find fault, find a remedy; anybody can complain. Henry Ford
-
Jonah D'Avella
Topic author - Posts: 686
- Joined: Mon Jul 27, 2020 8:00 am
- First Name: Jonah
- Last Name: D'Avella
- * REQUIRED* Type and Year of Model Ts owned: 1926 Touring
- Location: Kingsport TN
- Board Member Since: 2020
Re: Loss of power when activating horn?
I will do that. Will it cause any damage to my Magneto?
-
Dan Hatch
- Posts: 4144
- Joined: Tue Jan 08, 2019 7:31 pm
- First Name: Dan
- Last Name: Hatch
- Location: Alabama
- MTFCA Number: 49974
Re: Loss of power when activating horn?
How close is that screw to the spark plug? Is the plug shorting to horn?
-
ThreePedalTapDancer
- Posts: 1443
- Joined: Sun Nov 24, 2019 2:29 pm
- First Name: Ed
- Last Name: Martin
- * REQUIRED* Type and Year of Model Ts owned: 1914 Touring, 1909 Touring
- Location: Idaho
Re: Loss of power when activating horn?
- BD7FA589-9BAE-4C1F-BD28-4E9A7F44CD34.jpeg (116.79 KiB) Viewed 2489 times
-
Henry K. Lee
- Posts: 5339
- Joined: Sun Jan 06, 2019 11:09 am
- First Name: Henry
- Last Name: Lee
- * REQUIRED* Type and Year of Model Ts owned: Many
- Location: South Pittsburg, TN
- MTFCA Number: 479
- MTFCA Life Member: YES
Re: Loss of power when activating horn?
Who needs a horn..., watch for a finger!
-
Norman Kling
- Posts: 4095
- Joined: Tue Jan 08, 2019 1:39 pm
- First Name: Norman
- Last Name: Kling
- Location: Alpine California
Re: Loss of power when activating horn?
If that car has a battery and a generator, it should have a battery horn.
There are only two possible reasons the horn would cause the car to stop running. One would be a very weak magneto which is right on the edge, or something in the horn circuit which is grounding the magneto when you honk the horn. It should not damage the magneto unless your spark plug is shorting against the horn circuit which could cause very high voltage to enter the magneto. If the magneto still works when you are not trying to honk the horn, it is not damaged.
Does this cause the engine to stop even when you are running at a fast speed? Or is it just at idle that it stops?
Norm
There are only two possible reasons the horn would cause the car to stop running. One would be a very weak magneto which is right on the edge, or something in the horn circuit which is grounding the magneto when you honk the horn. It should not damage the magneto unless your spark plug is shorting against the horn circuit which could cause very high voltage to enter the magneto. If the magneto still works when you are not trying to honk the horn, it is not damaged.
Does this cause the engine to stop even when you are running at a fast speed? Or is it just at idle that it stops?
Norm
-
Stephen_heatherly
- Posts: 364
- Joined: Wed Jan 09, 2019 6:03 pm
- First Name: Stephen
- Last Name: Heatherly
- * REQUIRED* Type and Year of Model Ts owned: 26 coupe and 23 Runabout
- Location: St. Louis MO
Re: Loss of power when activating horn?
That's hilarious!
I use both.Stephen
-
Jonah D'Avella
Topic author - Posts: 686
- Joined: Mon Jul 27, 2020 8:00 am
- First Name: Jonah
- Last Name: D'Avella
- * REQUIRED* Type and Year of Model Ts owned: 1926 Touring
- Location: Kingsport TN
- Board Member Since: 2020
Re: Loss of power when activating horn?
i will check and respond to these inquiries near noon.
-
Jerry VanOoteghem
- Posts: 3003
- Joined: Sun Jan 06, 2019 4:06 pm
- First Name: Jerry
- Last Name: Van
- Location: S.E. Michigan
- MTFCA Number: 24868
Re: Loss of power when activating horn?
I think the spark plug shorting to the long screw, (which should be trimmed), would simply send the high voltage directly to ground, which shouldn't hurt anything, aside from ignition in #2Norman Kling wrote: ↑Wed Dec 16, 2020 9:22 pmIf that car has a battery and a generator, it should have a battery horn.
There are only two possible reasons the horn would cause the car to stop running. One would be a very weak magneto which is right on the edge, or something in the horn circuit which is grounding the magneto when you honk the horn. It should not damage the magneto unless your spark plug is shorting against the horn circuit which could cause very high voltage to enter the magneto. If the magneto still works when you are not trying to honk the horn, it is not damaged.
Does this cause the engine to stop even when you are running at a fast speed? Or is it just at idle that it stops?
Norm
.-
Rich Huggins
- Posts: 107
- Joined: Sat Oct 12, 2019 7:56 am
- First Name: Rich
- Last Name: Huggins
- * REQUIRED* Type and Year of Model Ts owned: 1923 touring- 1922 deverley truck -1922 center door
- Location: Maricopa AZ
- MTFCA Number: 50661
- Contact:
Re: Loss of power when activating horn?
Touch that long screw and honk the horn i bet you wont do that again
-
Susanne
- Posts: 1055
- Joined: Sat Apr 13, 2019 6:06 pm
- First Name: Susanne
- Last Name: Rohner
- * REQUIRED* Type and Year of Model Ts owned: Late '15 touring, "Angel".
- Location: Valfabbrica, (central) Italy
- MTFCA Number: 464
- MTFCA Life Member: YES
- Board Member Since: 1999
- Contact:
Re: Loss of power when activating horn?
The horn won't be the only thing making noise...
-
Jonah D'Avella
Topic author - Posts: 686
- Joined: Mon Jul 27, 2020 8:00 am
- First Name: Jonah
- Last Name: D'Avella
- * REQUIRED* Type and Year of Model Ts owned: 1926 Touring
- Location: Kingsport TN
- Board Member Since: 2020
Re: Loss of power when activating horn?
I tried it on my little brother, he wasn't happy. 