Subaru XT 1988 Service Manual page 1392

6-3
WIRING DIAGRAM AND TROUBLESHOOTING
2) Horn
Horn will not sound.
I Yes
See if horn circuit fuse in
I Fuse is blown.
I Replace fuse. fuse
I
box is blown.
No
No
I Break in harness between bat-
J
Repair harness and connector.
Check for voltage of 12V be-
tween
horn connector
(power
tery and horn.
source) and ground (body).
Yes
Determine if horn sounds
No
J
Horn is defective. I Replace horn. by
L J
grounding horn terminal (ground-
ing side).
Yes
Ground wire in steering wheel to
I
No
Break in harness between horn
I
Repair harness and connector.
I
see if horn sounds. grounding terminal and combina-
Yes
tion switch.
I
Repair faulty contact between
brush on combination switch side
and ring on steering wheel side.
Either horn switch or grounded
J
Repair horn switch or grounded
I
part of steering column is de- part of steering column.
fective.
Horn has low volume or cracked
!
or vibrating tone.
!
Check mounting bolts for loose-
No
J
Repair defective points.
ness, horn cord for proper ten-
sion, and horn for interference
with other parts.
t
Yes
Start engine (increase voltage to
I
J
Low sound.
I
Loosen lock nut, and turn adjust-
normal level), and sound horn.
ing screw counterclockwise at
pitch of about 20° .
(See Note'!
--t
Cracked sound.
Loosen lock nut, and adjust by
J
turning adjusting screw clockwise
20 to 30°.
(See Note.)
Vibrating sound. Loosen lock nut, and adjust by
I
turning right and/or left et pitch
Note: Be sure to ti hten lock nut
of about 20° .
9
firmly after adjustment.
(See Note'!
120