54 3100. My horn relay has full current at all three posts, as well as the steering wheel shaft but not on the steering wheel column. What in the world? Is the relay bad? Is the steering post supposed to be energized?
~~ Jethro 1954 3100 Back to Life In the Dity Gallery 1951 3100 (gone) / 1956 4400 (still in the neighborhood) / 1957 6400 with dump body (retired) / 1959 3100 panel (in the woods junked) / 1978 Custom Deluxe K10 / 1993 S-10 4.3 / 2004 Chevy Crew Cab / 1945 John Deere H / 1952 John Deere B / 1966 John Deere 2510 / 1967 John Deere 1020
The relay needs a ground to operate. The column may not have a ground but it is important that the ring (bearing), inside the column, provides a ground for the horn button contact. The picture is of a car but same setup. Notice the ground wire.
Last edited by buoymaker; 10/17/20225:41 PM.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
That ground on the bearing is there but it is hot. Current is coming from the relay through the wire to the brass bearing collar. Sounds like a bad relay to me.
~~ Jethro 1954 3100 Back to Life In the Dity Gallery 1951 3100 (gone) / 1956 4400 (still in the neighborhood) / 1957 6400 with dump body (retired) / 1959 3100 panel (in the woods junked) / 1978 Custom Deluxe K10 / 1993 S-10 4.3 / 2004 Chevy Crew Cab / 1945 John Deere H / 1952 John Deere B / 1966 John Deere 2510 / 1967 John Deere 1020
Tell us about your test light setup. Where is the other wire going to? You may just be measuring from hot to ground, which will light your probe. That's what looks like is happening in your first picture to the steering shaft, which would be grounded.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
The first pic is ground to the steering shaft. The second pic is from the bottom terminal (brown wire) from the relay to the ground wire on the column in your first pic. Same test light set-up. All three wires on the relay are hot.
~~ Jethro 1954 3100 Back to Life In the Dity Gallery 1951 3100 (gone) / 1956 4400 (still in the neighborhood) / 1957 6400 with dump body (retired) / 1959 3100 panel (in the woods junked) / 1978 Custom Deluxe K10 / 1993 S-10 4.3 / 2004 Chevy Crew Cab / 1945 John Deere H / 1952 John Deere B / 1966 John Deere 2510 / 1967 John Deere 1020
The horn relay has a coil (a coil of internal wire) that operates (magnetism) the contacts to operate the horn. There will be positive (12/6 VDC) attached to one side of the relay coil (via a ignition switch other other circuit). You will measure positive (12/6 VDC) on the other side of the coil because it is a coil of wire. If you ground that side of the coil it will make the relay operate.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
Doesn’t sound like the wiring is quite right. Here is a diagram of how it should be wired. 12v is wired exactly as 6v.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum
I figured it out today... horn now works fine.... hot steering shaft was backfeed from a sorry ground at the brake light.
~~ Jethro 1954 3100 Back to Life In the Dity Gallery 1951 3100 (gone) / 1956 4400 (still in the neighborhood) / 1957 6400 with dump body (retired) / 1959 3100 panel (in the woods junked) / 1978 Custom Deluxe K10 / 1993 S-10 4.3 / 2004 Chevy Crew Cab / 1945 John Deere H / 1952 John Deere B / 1966 John Deere 2510 / 1967 John Deere 1020
Good, glad to see you found your issue, great job!
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum
