Horn question...
Thread Starter
|
Junior User
Joined: Jun 2003
Posts: 70
Likes: 0
Horn question...
Hi,
I'm trying to get my horn working on my 77 F150.
The brass pin at the bottom of the turn signal switch has 12v, but I don't get a ground when I push the horn button.
Is the ground supposed to be the center steering shaft? If so, I don't get any continuity from the steering shaft to ground. Is there supposed to be a wire or something that grounds the center steering shaft, or does the horn get its ground elsewhere when the horn switch is closed.
Thanks for your time!
John Thomas
I'm trying to get my horn working on my 77 F150.
The brass pin at the bottom of the turn signal switch has 12v, but I don't get a ground when I push the horn button.
Is the ground supposed to be the center steering shaft? If so, I don't get any continuity from the steering shaft to ground. Is there supposed to be a wire or something that grounds the center steering shaft, or does the horn get its ground elsewhere when the horn switch is closed.
Thanks for your time!
John Thomas
Post Fiend
Joined: Mar 2005
Posts: 8,542
Likes: 5
From: Louisiana
My problem was my steering wheel had a gap in it and I didn't know why, so I pulled the wheel off and there was a circular piece of plastic with a metal nub sticking out of it, and that metal nub was suposed to be in a grove on the steering wheels back side, and it wasn't, put the nub back in it's correct place, and now I have a horn.
Other wise, check wiring to the horn.
Other wise, check wiring to the horn.
Elder User
Joined: Oct 2004
Posts: 527
Likes: 0
From: Port Alberni
Are you talking about a 78-79 steering wheel.Because i have the same problem with my 77 I can make my horns work at the relay.And when I tried a different column the horn worked.But that was a colunm I put together for a freind and had to give it back
Thread Starter
|
Junior User
Joined: Jun 2003
Posts: 70
Likes: 0
Originally Posted by 66f14evr
Are you talking about a 78-79 steering wheel.Because i have the same problem with my 77 I can make my horns work at the relay.And when I tried a different column the horn worked.But that was a colunm I put together for a freind and had to give it back
John Thomas
Elder User
Joined: Oct 2004
Posts: 527
Likes: 0
From: Port Alberni
When you take the horn pad off there are 2 wires there.If both are clipped in,Take the right wire and plug it into the hole instead of having it on the connecter.Try and use the horn and if that don't work try the other wire
New User
Joined: May 2005
Posts: 17
Likes: 0
Hello, the steering shaft is indeed the horn ground. There should be a wire at the part of the steering shaft/coupler underneath the hood. I have several 73-79's with the same prob. Most of them will blow if you turn the steering wheel some, then that completes the ground through the shaft when the gears are under load. The ground wire at the rubber coupler under the hood is probably not making good contact on one side of that coupler.
Senior User
Joined: Jun 2005
Posts: 169
Likes: 0
From: Kissimmee
My 73 truck did the same thing. I got sick of the big steering wheel and the broken horn buttons. So I bought a grant steering wheel. Everything works now.
Trending Topics
New User
Joined: Jan 2008
Posts: 0
Likes: 24
* Note:
The 78-79 horn systems are different depending on whether they have cruise control or not.
A 78/79 truck w/o cruise uses the regular horn circuit (yellow wire) without a horn relay.
A 78/79 truck with cruise uses the Regular non-cruise horn circuit...with an added horn circuit that runs through a relay behind the instrument cluster.
The earlier horns also run through a relay on the fender.
Do any of you have pics regarding the differences ?
The 78-79 horn systems are different depending on whether they have cruise control or not.
A 78/79 truck w/o cruise uses the regular horn circuit (yellow wire) without a horn relay.
A 78/79 truck with cruise uses the Regular non-cruise horn circuit...with an added horn circuit that runs through a relay behind the instrument cluster.
The earlier horns also run through a relay on the fender.
Do any of you have pics regarding the differences ?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Postmaster
Joined: Jul 2005
Posts: 3,248
Likes: 0
Originally Posted by John Thomas II
Hi,
I'm trying to get my horn working on my 77 F150.
Is the ground supposed to be the center steering shaft? If so, I don't get any continuity from the steering shaft to ground. Is there supposed to be a wire or something that grounds the center steering shaft, or does the horn get its ground elsewhere when the horn switch is closed.
I'm trying to get my horn working on my 77 F150.
Is the ground supposed to be the center steering shaft? If so, I don't get any continuity from the steering shaft to ground. Is there supposed to be a wire or something that grounds the center steering shaft, or does the horn get its ground elsewhere when the horn switch is closed.