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HORNS
8G - 1
HORNS
C O N T E N T S
Page
SERVICE PROCEDURES
2
GENERAL INFORMATION
The h o r n system (Fig. 1) consists of a h o r n switch,
h o r n relay (located on t h e fuse block), horns, a n d a l l
t h e i r w i r i n g and connections. The circuit is fed from
the fuse block and grounded i n t h e horn
switch.
W h e n t h e h o r n switch on t h e steering column is
pressed, t h e ground circuit is completed, energizing
the relay, a n d supplying power to t h e horns.
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TEST PROCEDURES
1
Fig. 1 Horn System
T E S T P R O C E D U R E S
INDEX
Page
. . . 2
Horns Sound Continuously .
HORNS WILL NOT SOUND
I f the horns do not sound, check for a blown horn
fuse i n cavity number 6 of the fuse block. I f the fuse
is blown, replace i t w i t h the same type fuse. I n case
the horns fail to sound and the newly replaced fuse
blows when depressing the horn switch, a short cir-
c u i t i n t h e horn or the horn w i r i n g between t h e fuse
t e r m i n a l a n d the horn is responsible.
I f t h e fuse is intact, disconnect wire connector a t
h o r n a n d connect one lead of a test lamp to t h e w i r e
connector a n d the other lead to a good body ground
(Fig. 2). Depress the horn switch. Should test lamp
i l l u m i n a t e the horn is ungrounded or faulty. Ground-
i n g can be verified by m a k i n g a temporary
j u m p e r
w i r e
connection
between
horn
bracket
(scratch
t h r o u g h paint) and t h e negative battery
t e r m i n a l .
W i t h t h e ground jumper wire s t i l l intact a n d t h e
h o r n reconnected, i f the horn s t i l l fails to sound
w h e n horn button or r i m is depressed, replace t h e
h o r n .
I f the lamp fails to i l l u m i n a t e , check for a defective
h o r n relay by substituting a known good horn relay
Horns Will Not Sound
Page
. . . 1
i n t h e circuit. I f the lamp i l l u m i n a t e s when depress-
i n g the h o r n switch, the original relay is defective. I f
the lamp fails to i l l u m i n a t e w i t h a k n o w n good relay,
u n p l u g t h a t relay and connect a j u m p e r w i r e from
the battery t e r m i n a l to the horn t e r m i n a l on t h e re-
lay t e r m i n a l board. I f the lamp, w h i c h is connected
i n place of the horns, fails to i l l u m i n a t e , inspect for
an open circuit between the horn fuse and t h e horn
t e r m i n a l on t h e relay t e r m i n a l board and between
relay t e r m i n a l board and the horn terminals. Should
the lamp i l l u m i n a t e , a defective h o r n switch or a n
open c i r c u i t i n the w i r i n g between t h e relay t e r m i n a l
and the h o r n switch is a t fault.
HORN
TEST LAMP
TO RELAY AND
HORN BUTTON
H O R N /
TO GOOD BODY GROUND
CONNECTOR
Fig. 2 Testing for Voltage
PR714
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