Isuzu Rodeo UE. Manual — part 567
8D–116
WIRING SYSTEM
Circuit Diagram
D08RX121
8D–117
WIRING SYSTEM
Parts Location
D08RX120
Legend
(1) H–14
(2) I–41, I–42
(3) Alarm & Relay Control Unit
(4) Horn Switch
(5) I–32
(6) Horn (Low note)
(7) C–14
(8) C–12
(9) Horn (High note)
8D–118
WIRING SYSTEM
Diagnosis
Horn Do Not Sound
Step
Action
Value(s)
Yes
No
1
Is the fuse 2 normal?
—
Go to Step 2
Replace the
fuse
2
Remove the horn relay.
Is the battery voltage applied between horn relay
harness side connector I–41 terminal 2 or connector
I–42 terminal 2 and the ground?
Approx. 12V
Go to Step 4
Go to Step 3
3
Repair an open circuit between the fuse 2 and
connector I–41 terminal 2 or connector I–42 terminal 2.
Is the action complete?
—
Go to Step 2
—
4
Connect the battery positive terminal with the horn
relay side connector I–41 terminal 2 or connector I–42
terminal 2 and the negative terminal with connector
I–42 terminal 20 or 15.
Is there continuity between horn relay side connector
I–41 terminal 2 and 1 or connector I–42 terminal 2 and
connector I–41 terminal 4?
—
Go to Step 5
Replace the
relay
5
1. Disconnect the horn switch connector I–49.
2. Press the horn switch.
Is there continuity between the switch side connector
I–49 terminal 1 and the ground?
—
Go to Step 6
Repair or
replace the
switch
6
Is there continuity between harness side connector
I–42 terminal 20 or 15 and harness side connector I–49
terminal 1?
—
Go to Step 8
Go to Step 7
7
Repair an open circuit between connector I–42
terminal 20 or 15 and connector I–49 terminal 1.
Is the action complete?
—
Verify repair
—
8
Repair an open circuit between the horn relay and the
horns.
Is the action complete?
—
Verify repair
—
Horn Do Not Shut Off
Step
Action
Value(s)
Yes
No
1
Disconnect the horn connector C–12 or C–14.
Is the battery voltage applied between harness side
connector C–12 or C–14 terminal 1 and the ground?
Approx. 0V
Replace the
relay
Go to Step 2
2
Disconnect the horn switch connector I–49.
Is there continuity between switch side connector I–49
terminal 1 and the ground?
—
Repair or
replace the
switch
Go to Step 3
3
Repair a short circuit between the horn relay and the
horn switch.
Is the action complete?
—
Verify repair
—
8D–119
WIRING SYSTEM
Dome Light, Luggage Room Light, Courtesy Light, Map Light, Seat
Belt Switch and Warning Buzzer
General Description
The circuit consists of door switch, dome light, luggage
room light, courtesy light, map light seat belt switch, seat
belt warning light, key cylinder switch and alarm & relay
control unit.
Dome light comes on with dome light switch turned to
door position and any door open.
The buzzer sounds when starter switch is turned to either
“ACC” or “OFF” position and FRT door–LH, is opened
with lighting switch on.
The buzzer sounds when FRT door–LH is opened with
starter key left in starter switch key cylinder.
The buzzer also sounds when starter switch is turned to
“ON” position with seat belt unfastened.
These functions are controlled by alarm & relay control
unit.
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