RE: [Chrysler300] 57 horns

["Rich Barber" <c300@xxxxxxx>]

I have prepared a wiring diagram for my 1955 6-Volt C-300 in Excel format
and it is probably schematically correct for your '57 horn circuit.  I've
copied part of it below and also attaching the file.  The portion copied
below is somewhat distorted, but may come through for you.  I know it will
never make it to the server, so anyone interested in the diagram can e-mail
me.  I'm not saying its perfect, but it has been helpful to me as it is in
color and matches my 2-door hardtop without a/c.

 

The horns work through a horn relay-on the driver's side fender liner in my
'55.  The low current side of the relay has one connection from the ignition
switch "I" that is always hot when the ignition switch is on.  When the horn
ring is pressed it completes the ground circuit to the relay "S".
Completing the ground circuit causes the relay to close the circuit between
the high current input from the battery "B" to the heavy wire going to the
first horn "H".  To check, I'd first check to see if you have 12 Volts at
"I" with the ignition switch on and at "B" at all times, then disconnect the
"S" wire and connect your ohmmeter to the end of the wire and a good ground.
Pressing the horn ring should close the circuit to zero Ohms.  If all this
checks out, use a heavy jumper from "B" to "H".  This should cause the horns
to honk unless they are gummed up or the wire from "H" to the first horn is
parted or shorted.  You can also connect that heavy jumper from the hot side
of the battery direct to the power tab on either horn.  If you get a spark,
but no noise, the horns are gummed up.  No spark may indicate an open
circuit in the horn coil or a bad ground where the horn is bolted to the
chassis.

 

We have an unscientific fix for frozen, gummed up, corroded horns, also.
Let me know if you need that.

 

C-300'ly,

Rich Barber

Brentwood, CA

1955 Chrysler C-300

 


 

DEFROSTER MOTOR

 

 

 

DEFROSTER SWITCH

 

 

 

 

HORNS

 

 

 

 


 




 

14-BLACK

 

14 BROWN

M

B

 

 

 

 

 

             HORN RELAY

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

HEATER MOTOR

 

CONNECTORS

 

HEATER SWITCH

 

 

 

 

12-GREEN

 

 

H

 


 

 

14-BLACK

 

14-BLACK

M

B

 

DISTRIBUTOR

 

 

 

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 


FUEL TANK SENDING UNIT (only one wire to SU)

FUEL GAUGE

 

 

 

 

 

+'          -

14-BLACK

 

S

 


 

 

 

BLUE

 

 

 

 

 

 

14-BLACK

COIL

 

 

 

 


 

 

 

 

 

 

 

14-BLACK

 

 

 

RADIO CONDENSER

 

I

 

 


 

 

 

WHITE

 

 

 

 

 

14 AMP FUSE  

16 BLACK TO INST SWITCH

 

CONNECTORS


 

BACKUP LIGHT SWITCH (NON STANDARD-300)

BLUE

 

 

 

 

 

 

 

 

HORN

 


 

 

WINDSHIELD WIPER SWITCH

 

 

 

 

 

 

RADIO & 2 LIGHTS

 

BUTTON

 


 

 

 

     B

 

 

 

 

ACC          

 

16 BLACK TO FLASHER

 

 

 


 

 

 

 

 

12 RED

 

 

 

IGN

 

14 RED

 

 

 

 


 

 

 

 

10 AMP

 

 

 

 

 

 

 

 

 

 

 


 

 

 

 

CIRCUIT BREAKER

 

 

 

ST

 

16-BLACK & YELLOW

 

12 GREEN

 

 


 

 

     A

        P

 

 

 

 

 

 

 

 

 

 

 

 


 

 

 

 

TEMPERATURE

 

 

 

 

AMM          

 

10 BROWN

 

 

 

 


 

TO BACK UP

    F2

   F1

GAUGE

 

STARTER AND

 

 

           LIGHTER 

 

 

 


 

LIGHTS

 

 

 

 

IGNITION SWITCH

 

 

          FUSED?

 

 

 

 

 



[Non-text portions of this message have been removed]


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