Horn adjustment

Discuss all things Model T related.
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

Topic author
Unprr
Posts: 290
Joined: Mon Jan 07, 2019 9:20 pm
First Name: George
Last Name: Schmidt
* REQUIRED* Type and Year of Model Ts owned: 1927 coupe, 1924 Model T pickup
Location: Elkhorn

Horn adjustment

Post by Unprr » Sun Oct 19, 2025 5:44 pm

I’m trying to adjust my horn, it has stopped blowing.
In the past, a simple turning of the screw in the rear , would bring it back.
Not this time,
Please note the horn manufacturer, in the photos.

George
Elkhorn, Nebraska
Attachments
IMG_3843.jpeg

User avatar

Tadpole
Posts: 596
Joined: Wed Jul 28, 2021 7:17 am
First Name: Tad
Last Name: Glahn
* REQUIRED* Type and Year of Model Ts owned: 1925 Coupe, 1926 TT Closed Cab, 2 1924 Runabouts, 1927 Tudor
Location: Grant's Lick, Kentucky
Board Member Since: 2021

Re: Horn adjustment

Post by Tadpole » Sun Oct 19, 2025 7:14 pm

Back it off and lube it with a light lubricant like 3 in one. See if you can get the armature to spin freely without engaging the diaphragm then turn the screw in until it blows.

User avatar

Tadpole
Posts: 596
Joined: Wed Jul 28, 2021 7:17 am
First Name: Tad
Last Name: Glahn
* REQUIRED* Type and Year of Model Ts owned: 1925 Coupe, 1926 TT Closed Cab, 2 1924 Runabouts, 1927 Tudor
Location: Grant's Lick, Kentucky
Board Member Since: 2021

Re: Horn adjustment

Post by Tadpole » Sun Oct 19, 2025 7:15 pm

Would do good to clean the contacts while you have the cover off to oil the shaft.


Allan
Posts: 6904
Joined: Sun Jan 06, 2019 7:21 pm
First Name: Allan
Last Name: Bennett
* REQUIRED* Type and Year of Model Ts owned: 1912 van, 1917 shooting brake, 1929 roadster buckboard, 1924 tourer, 1925 barn find buckboard, 1925 D &F wide body roadster, 1927LHD Tudor sedan.
Location: Gawler, Australia

Re: Horn adjustment

Post by Allan » Sun Oct 19, 2025 9:34 pm

It's funny how we get stuck with things. Bulb horns actually were blown by the air sqeezed out by compressing the air in the bulb. Later horns don't "blow "at all.
Motor driven horns make their racket by driving a notched stem against a similarly notched boss on a diaphragm, that racket being amplified by the horn bell.
If the motor works it is a matter of adjusting the load on the two mechanical parts until they produce the desired noise.

Allan from down under.

User avatar

DanTreace
Posts: 3950
Joined: Sun Jan 06, 2019 10:56 am
First Name: Dan
Last Name: Treace
* REQUIRED* Type and Year of Model Ts owned: '23 cutoff pickup, '27 touring
Location: North Central FL
Board Member Since: 2000
Contact:

Re: Horn adjustment

Post by DanTreace » Mon Oct 20, 2025 10:23 am

Unprr wrote:
Sun Oct 19, 2025 5:44 pm
I’m trying to adjust my horn, it has stopped blowing.
In the past, a simple turning of the screw in the rear , would bring it back.
Double check power and ground. Could be battery voltage too low.

The insides are most the same for motor horns, you may have to oil some spots; or clean the armature where the brushes contact, should be bright. No oil should be there either.

Adjusting is with the screw to place force on the gear to rub the diaphragm.
Image 7-8-21 at 4.25 PM.jpeg
Image 7-8-21 at 4.25 PM.jpeg (37.61 KiB) Viewed 7 times
aoggha horn 6v.jpeg
aoggha horn 6v.jpeg (91.01 KiB) Viewed 7 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

Post Reply Previous topicNext topic