Horn Not Working Willys MB

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
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acespast
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Horn Not Working Willys MB

Post by acespast » Wed May 15, 2019 10:17 am

Hi,
I recently changed the steering wheel on my 42 Willys MB and now the horn does not work.Prior to this is was working ok.Any advise please.
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Chuck Lutz
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Re: Horn Not Working Willys MB

Post by Chuck Lutz » Wed May 15, 2019 10:31 am

Did you install the steering wheel all the way down on the splines? If not that button may not depress enough to close the contact.
Remove the nut and horn button, depress the spring-loaded surface where the horn button would be and see if the horn works.
Chuck Lutz

GPW 17963 4/24/42 Chester, PA. USA 20113473 (USA est./Tom W.)
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Re: Horn Not Working Willys MB

Post by acespast » Thu May 16, 2019 9:29 am

Hi Chuck,yes i tried that but still not working.Any other ideas plz
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Rml1708
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Re: Horn Not Working Willys MB

Post by Rml1708 » Thu May 16, 2019 9:46 am

There is a decent topic here somewhere that works you through the troubleshooting process. I have a tough time with searching some of these needed topics
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Re: Horn Not Working Willys MB

Post by YLG80 » Thu May 16, 2019 10:36 am

The schematic can help you.
Follow 1-2-3-4
TROUBLESHOOT_HORN.jpg
TROUBLESHOOT_HORN.jpg (125.37 KiB) Viewed 153 times

If you don't touch the steering wheel horn button and you have + voltage on one post of the horn, check the voltage on the other post and follow the circuit up to the steering column contact.
You should find a positive voltage all along the wiring.
The steering column contact is only grounded when pushing on the horn button.

Good luck
Yves
Last edited by YLG80 on Thu May 16, 2019 11:57 pm, edited 2 times in total.
Ford GPW 164794 1/4T 12-7-43 - Frame# GPW*239762*
ACM I body#198443
Restored as 1st Army 759th LT B21
ON6YD(ex YB1AUH)


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Re: Horn Not Working Willys MB

Post by artificer » Thu May 16, 2019 1:16 pm

Yves is right on the money.

Get out the multi-meter or test light.
Both wires @ the horn should exhibit vehicle voltage as should the wire @ the bottom & top of the steering column.
When the button is pressed this live @ the top of the steering column is grounded & the horn sounds.
John GIBBINS Member Institute of Automotive Mechanical Engineers [Ret], ASE Master Medium/Heavy Truck & Auto Technician USA -2002 Licensed Motor Mech NSW MVIC 49593 Current 2015
TO DIAGNOSE, TROUBLESHOOT OR FAULT FIND ANY AUTO SYSTEM....
Understand how system parts interact with one another. GOOD parts can then be established & the NOT GOOD problem/s part/s isolated for repair or replacement.

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Re: Horn Not Working Willys MB

Post by acespast » Fri May 17, 2019 10:15 am

Thanks Yves,i shall endeavor to sort it tomorrow.I shall keep you informed.
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Re: Horn Not Working Willys MB

Post by acespast » Sat May 18, 2019 9:53 am

All done,What i did was to take steering wheel off again,pulled wiring a little up/down and after putting wheel back on it worked perfectly.Thank you all for your help.
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Re: Horn Not Working Willys MB

Post by YLG80 » Sat May 18, 2019 10:35 am

Thanks for the feedback. The horn button switch is a little bit rustic :D !
Ford GPW 164794 1/4T 12-7-43 - Frame# GPW*239762*
ACM I body#198443
Restored as 1st Army 759th LT B21
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