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JA
DIAGNOSIS AND TESTING (Continued)
(a) When the horn contact is not depressed, no
continuity.
(b) Continuity to ground when horn contact is
depressed.
(c) If continuity is not correct, repair horn con-
tact or wiring as necessary. Refer to Group 8W,
Wiring diagrams.
(3) Insert a jumper wire between terminals 8 and
10 of the horn relay in the Junction Block.
(a) If horns sound replace relay.
(b) If the horns do not sound, install horn relay
and refer to Horn Test.
(4) Using voltmeter, test battery voltage:
(a) Test Junction Block horn relay terminals 6
and 8 for voltage from fuse 8.
(b) If not OK, repair as necessary. Refer to
Group 8W, Wiring Diagrams.
HORNS WILL NOT SOUND
Check horn fuse 14 in the Power Distribution Cen-
ter and fuse 8 in the Junction Block. If fuse is blown
refer to FUSE BLOWN section. If fuse is OK, refer to
FUSE OK section.
FUSE BLOWN
(1) Verify condition of battery terminals and volt-
age, refer to Group 8A, Battery. If battery connec-
tions and battery charge is OK, go to Step 2.
(2) Using a voltmeter, test for battery voltage at
both sides of horn fuse 8. If voltage is OK, on both
sides of fuse, go to Fuse OK. If voltage is OK, on one
side of fuse, the fuse is blown, go to Step 3.
(3) Using a suitable ammeter in place of the fuse,
test amperage draw of the horn circuit. If amperage
draw is greater than 20 amps without the horn
switch depressed, a grounded circuit exists between
the fuse and the horn relay. Go to Step 4. If amper-
age draw is greater than 20 amps with the horn
switch depressed, a grounded circuit exists between
the horn relay and the horn. Go to Step 6.
(4) Remove the horn relay from the Junction
Block. If the amperage draw drops to 0 amps, the
horn switch or circuit is shorted. Refer to group 8W,
Wiring Diagrams for circuit information. If amperage
does not drop go to Step 5.
(5) Disconnect both horns. If amperage does not
drop with both horns disconnected and the horn
switch depressed, go to Step 7. If the amperage draw
drops go to Step 6.
(6) Disconnect the wire connector from one of the
horns. If amperage drops and the connected horn
sounds, reverse the procedure, and replace the faulty
horn.
(7) Using a continuity tester, with the horns dis-
connected test continuity of the X2 cavity of the horn
relay to ground. Refer to Group 8W, Wiring Diagrams
for circuit information. If continuity is detected, the
circuit is grounded between the Junction Block and
the horns. Locate and repair pinched harness. If the
amperage draw does not drop to 0 amps, repair short
at the Junction Block.
FUSE OK
(1) Remove the horn relay from the Junction
Block.
(2) Using a continuity tester, Depress horn switch
and test continuity from the X3 cavity of the horn
relay to ground. Refer to Group 8W, Wiring Diagrams
for circuit information.
(a) If continuity is detected, go to Step 3.
(b) If NO continuity, go to Step 4.
(3) Using a suitable jumper wire, jump across the
fuse F62 cavity and the X2 cavity of the horn relay in
the Junction Block.
(a) If the horn sounds, replace the horn relay.
(b) If the horn does not sound, go to Step 4.
(4) Remove airbag/horn pad from steering wheel.
Refer to Group 8M, Restraint Systems for proper pro-
cedures.
(5) Test continuity across horn switch connectors
with horn switch depressed.
(a) If continuity is detected, repair open circuit
between the relay and the horn switch.
(b) If NO continuity, replace airbag cover.
(6) Install horn relay into Junction Block.
(7) Disconnect the wire connectors from horns.
(8) Using a voltmeter, with the horn switch
depressed test voltage across horn connector termi-
nals of the wire harness (Fig. 1).
(a) If voltage is detected, replace horns.
(b) If NO voltage, go to Step 9.
(9) With the horn switch depressed, test for volt-
age between the X2 circuit and ground.
(a) If voltage OK, repair system ground at right
cowl area. Refer to Group 8W, Wiring Diagrams.
(b) If NO voltage, repair open X2 circuit between
the relay and the horns.
SYSTEM TEST
CAUTION: Continuous
cause horn relay to fail.
Check fuse 8 in the Junction Block, and refer to
Horn System Test table.
Refer to Group 8W, Wiring Diagrams for circuit
and wiring information.
HORNS
8G - 3
sounding
of
horns
will
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