(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 12 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.
Fig. 2 Horn Switch
AIRBAG MODULE
HORN SWITCH
Fig. 3 Horn Relay Location
H/LP RELAY CIRCUIT BREAKERS
HORN RELAY
8G - 2 HORNS JX
DIAGNOSIS AND TESTING (Continued)
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