Horn wiring

1959 - 1978, M151, M151A1, M151A2, Technical questions and discussions, regarding anything related to the M151.
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Gunbunny198
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Horn wiring

Post by Gunbunny198 » Wed Apr 17, 2019 5:20 pm

Does anyone have a diagram as to how the horn is wired? My Mutt has a horn but the steering column button and maybe wiring is missing. Wondering where the relay and fuse are if there are any so I can use a after market button till I can get all the correct parts.

Thanks
Gunbunny198
Paul

Rickf
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Re: Horn wiring

Post by Rickf » Thu Apr 18, 2019 6:40 am

No relay and the fuse is actually a circuit breaker behind the dash to the left of the instrument panel. Any horn button will do, all it does is ground the horn wire which is hot all the time.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

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W. Winget
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Re: Horn wiring

Post by W. Winget » Thu Apr 18, 2019 7:22 am

For specifics, see page 2-172 of the TM 9-2320-218-20
http://www.imfmotorpool.com/TM_9-2320-218-20sept71.pdf
There are wiring diagrams earlier, the specific connector tag your looking to trace is #25, goes from button, down the full length of the steering tube to the left side of the engine bay near the generator, then connects into wiring harness, (pigtail #25) goes to horn, which connects to circuit breaker and finally positive. Push button, make ground connection...BEEP BEEP.

It's a free manual, this version has photos and transitions into the A2, so it has both early and late material. Photos in this one are actually viewable, but a real print job can't be beat. Gotta get all the manuals, either in original print, CD or free downloads if you own any vehicle.
V/R W Winget
Looking for 1918 Standard B 'Liberty' truck parts

Gunbunny198
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Re: Horn wiring

Post by Gunbunny198 » Thu Apr 18, 2019 6:46 pm

Thank you guys and yes manuals are on the hit list haha.

Gunbunny198
Paul

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