Re: [FWDLK] Horn Relay wiring on a 58

[David Homstad <dhomstad@xxxxxxxxxxx>]

Bryan,

The horn relay schematic is shown in your 58 DeSoto shop manual on page 33
of the Specifications Section.

There are 4 terminals:
B: violet wire to starter relay.
G: black/wht stripe wire to horn button.
H: dark green/wht stripe wire to horns.
IGN: uncoded  (possibly dark blue) wire connects mid span to the dark blue
wire between IGN terminal of ignition switch and the ballast resistor. This
may be your dangling dark blue wire.

When the ignition is "on" and the horn button pressed, current flows in the
IGN terminal, through the relay coil, to ground at the button. This
energizes the coil, closes the relay contacts, and flows current in the B
terminal and out the H terminal to the horns.

I have no idea of the function of the "gang of wires with a thin red,
yellow, green and blue wire attached to the ignition terminal", since these
are not on the schematic at the horn relay. Some previous owner may have
modified or repaired the wiring.

I would recommend testing the dangling dark blue wire to see if it becomes
hot at any of the ignition switch positions.

Dave Homstad
56 Dodge D500

-----Original Message-----
From: Forward Look Mopar Discussion List
[mailto:L-FORWARDLOOK@xxxxxxxxxxxxx]On Behalf Of Bryan Scott
Sent: Sunday, December 12, 2004 8:07 PM
To: L-FORWARDLOOK@xxxxxxxxxxxxx
Subject: [FWDLK] Horn Relay wiring on a 58

Hi all!

Looking at the horn relay on my 58 DeSoto Fireflight (V-8 361) I have three
wires attached - a purple wire attached to the batt terminal; a green wire
to the horn terminal; a gang wire with a thin red, yellow, green and blue
wire attached to the ignition terminal, and a black ground.  Here's my
question:  Next to the relay there is a also a dark blue wire dangling in
the air looking for a home.  It is taped to the same bunch of wires that the
others are bound in, and its proximity to the relay makes it look like it
was once attached.  I know it's tough to speculate about it sight unseen,
but does this ring anyone's bell????  My wiring diagram doesn't even show
the relay.

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