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Old 04-25-2019, 01:55 PM   #1
Mini-Skoolie
 
Join Date: Mar 2016
Location: Central NC
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Year: 1998
Coachwork: Carpenter
Chassis: International 3800
Engine: International t444e
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Horn not working

Hey everyone

I have a 98 International 3800 with the t444e.

The horn doesn't work, although the relay clicks when I engage the steering wheel switch. The horn does work when I run a jumper from the battery.

Does anyone know how the horn is wired? Is there a fuse somewhere between the relay and the horn that I should know about?

Thanks in advance - Gary
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Old 04-25-2019, 03:56 PM   #2
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Sounds like it's just a fuse?
Look in your fuse panels and try to spot any that are blown?
Most likely a 10-15 amp one.
Good luck
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Old 04-26-2019, 10:55 AM   #3
Mini-Skoolie
 
Join Date: Mar 2016
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Coachwork: Carpenter
Chassis: International 3800
Engine: International t444e
Rated Cap: 66?
Thanks man. That was my first thought, but the horn fuse was solid.

Also, since the relay is clicking, it would seem there is power to that point.

So now I'm wondering if there might be an inline fuse somewhere or if I have a break in the wire.
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Old 04-26-2019, 11:03 AM   #4
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My horn is located right under the bus under driver seat. stick a volt meter on it and start tracing it backwards.

I want the train horns that flying J sells

Inside your electrical door on the side is there a wiring diagram? like this one?
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Old 04-26-2019, 12:35 PM   #5
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What, horn doesn't work? That blows... lol couldn't resist.
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Old 04-26-2019, 01:31 PM   #6
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Swap the horn relay for another similar one. Or check the ground on the relay socket itself. Pushing the horn button completes the circuit to ground and that makes the horn blow if the relay is good.

Could be a broken wire running up the steering column to the horn button.

Check everything with a meter, don't be guessing.
You checked the horn already so that much works, only leaves the relay or harness.


John
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Old 04-26-2019, 01:54 PM   #7
Mini-Skoolie
 
Join Date: Mar 2016
Location: Central NC
Posts: 45
Year: 1998
Coachwork: Carpenter
Chassis: International 3800
Engine: International t444e
Rated Cap: 66?
Yeah Cicso - My horns are located right under the radiator so tracing the wires back through the engine compartment is a bear, but that may be what I need to do.

I don't have a wiring diagram in the main compartment, but I do have the owner's manual, so I could check in there.

This might be my excuse to go ahead and get an air horn!
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Old 04-26-2019, 02:01 PM   #8
Mini-Skoolie
 
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Year: 1998
Coachwork: Carpenter
Chassis: International 3800
Engine: International t444e
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Quote:
Originally Posted by leadsled01 View Post
What, horn doesn't work? That blows... lol couldn't resist.







atleast10characters
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Old 04-26-2019, 02:03 PM   #9
Mini-Skoolie
 
Join Date: Mar 2016
Location: Central NC
Posts: 45
Year: 1998
Coachwork: Carpenter
Chassis: International 3800
Engine: International t444e
Rated Cap: 66?
Quote:
Originally Posted by BlackJohn View Post
Swap the horn relay for another similar one. Or check the ground on the relay socket itself. Pushing the horn button completes the circuit to ground and that makes the horn blow if the relay is good.

Could be a broken wire running up the steering column to the horn button.

Check everything with a meter, don't be guessing.
You checked the horn already so that much works, only leaves the relay or harness.


John
I do have a spare relay, so I can try that. The switch does work. I'm guessing there is a problem in the harness. Joy, joy. Thanks
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