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JR
HORN
DIAGNOSIS AND TESTING - HORN
Refer to the appropriate wiring information. The
wiring information includes wiring diagrams, proper
wire and connector repair procedures, details of wire
harness routing and retention, connector pin-out
information and location views for the various wire
harness connectors, splices and grounds.
Check horn fuse 16 in the Power Distribution Cen-
ter and fuse 8 in the Junction Block. If fuse is blown
refer to FUSE BLOWN. If fuse is OK, refer to FUSE
OK.
FUSE BLOWN
(1) Verify condition of battery terminals and volt-
age, (Refer to 8 - ELECTRICAL/BATTERY SYSTEM
- DESCRIPTION). If battery connections 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. 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. 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.
(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 8 - ELECTRICAL/RESTRAINTS/DRIVER
AIRBAG - REMOVAL).
(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 connector from horn.
(8) Using a voltmeter, with the horn switch
depressed test voltage across horn connector termi-
nals of the wire harness.
(a) If voltage is detected, replace horn.
(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.
(b) If NO voltage, repair open X2 circuit between
the relay and the horns.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove right side headlamp unit. (Refer to 8 -
ELECTRICAL/LAMPS/LIGHTING
HEADLAMP UNIT - REMOVAL).
(3) Remove horn mounting bolt.
(4) Disconnect wire harness connector.
INSTALLATION
(1) Connect wire harness connector.
(2) Install horn mounting bolt.
(3) Install right side headlamp unit. (Refer to 8 -
ELECTRICAL/LAMPS/LIGHTING
HEADLAMP UNIT - INSTALLATION).
(4) Connect battery negative cable.
HORN
8H - 3
-
EXTERIOR/
-
EXTERIOR/
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