[T3] Horn Issue

[Keith Park]

Oh that’s nothin!  I got a whole second fuse box under the right side of my
dash, and the center console is a nest of wires.
Just be sure to document things, going back under there 30 years later Id be
lost without my wiring diagram.  Ya, and as Jim said,
'the horn circuit can be the most difficult to wrap your head around.

Keith

Topnotch Restorations
topnotch at nycap.rr.com
http://www.topnotchresto.com
71 Squareback  “Hothe”
65 Notchback  “El Baja Rojo”
93 RX7  “Redstur”
13 Subaru Outback "Blendin"

-----Original Message-----
From: type3-vwtype3.org <type3-vwtype3.org-bounces at lists.vwtype3.org> On
Behalf Of Max Welton
Sent: Thursday, January 29, 2026 8:32 PM
To: type3-vwtype3.org at lists.vwtype3.org
Subject: [T3] Horn Issue

I decided to split this topic off on its own.

So I have verified how the horn is wired. The black and yellow wire from the
horn goes to second from the right fuse. I know this because I accidentally
touched the wire to the chassis up by the horn and promptly cooked the fuse.
The other wire (looks red to me but I'm
color-blind) runs up to the steering column such that the horn ring can
complete the ground path back down the steering shaft.

Getting out my multimeter, I found that the steering column is not
completely isolated from the chassis as it should be. I read ~70 ohms
between the column and the chassis.

Now the column is rubber-mounted to the bottom of the dash so that _should_
be fine. But the steering tube runs through the "firewall".
But I find no continuity between the tube and the chassis.

At this point the tube and head are detached and all wires (horn, ign
switch, turn signals) are disconnected. When my back stops screaming I'll
start building the column back up and hopefully find the leak.

BTW, has anyone figured out a way to clean up a type-3 wiring nest? I can
only work on it by laying on my back with wires and relays all hanging down
in my face. It's easily my least favorite are to work on.

https://www.thesamba.com/vw/gallery/pix/2647667.jpg

Max
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