[T3] Horn Issue

[Max Welton]

Copy that. With any luck I'm getting close to a  working horn without
any battery draining side-effects.

I try to avoid adding complexity under the dash. On the other hand I
have a megasquirt sitting behind the rear seat with all sorts of
supporting electrics. But I made sure all that is relatively easy to
access.

Max

On Thu, Jan 29, 2026 at 7:24 PM Keith Park <topnotch at nycap.rr.com> wrote:
>
> 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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