Isuzu Trooper (1996-2001 year) Electrical Manual — part 27
61-1
REAR DEFOGGER
(Refer to Section 201 for photographs.)
Component
Photo No.
Alarm and Relay Control
Unit
Behind right kick panel
116
. . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dash Fuse Box
Behind left dash side trim panel
55
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Defogger Relay
In dash fuse box
56
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector
G-3 (1-BLK)
On left side of glass, in left tailgate door
93
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G-7 (1-BLK)
On right side of glass, in left tailgate door
93
. . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-25 (22-BLU)
Below I/P, above left dash side trim panel, on bracket
71
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
H-31 (2-WHT)
Below left front seat
105
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-37 (4-GRY)
Left rear of luggage room
89
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
H-48 (16-BLK)
Behind right dash side trim panel
120
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ground
R-3
Left side of luggage room
90
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Operation
Voltage is applied at all times through fuse C-17 to the
rear defogger relay contact. With the starter switch in ON
or START, voltage is applied through fuse C-4 to the rear
defogger switch and the rear defogger relay coil.
When the rear defogger switch is pushed, a voltage is
detected at connector B6 pin 8 of the alarm and relay
control unit, and provides ground at connector B7 pin 5
for the rear defogger relay coil and the rear defogger
“ON” indicator light. The rear defogger relay energizes
and the relay contact closes. Battery voltage is then ap-
plied to the rear defogger. The indicator remains illumi-
nated and the rear defogger heats the rear window to
remove any fog from the glass. The rear defogger will
turn off automatically after approximately 30 minutes. It
will also turn off if the starter switch is turned to OFF or if
the rear defogger switch is depressed again.
Component Location Index
AUTOMATIC A/C CONTROLS
A/C Compressor Clutch
A/C Compressor Relay
A/C Pressure Switch
A/C Thermostat Relay
Automatic Heater-A/C
Control Unit
Blower Motor
Dash Fuse Box
Fuse/Relay Box
Heater and A/C Relay
In-car Temperature Sensor
Intake Actuator
Max Hi Relay
Mix Actuator
Mode Actuator
Power Transistor
Component Index
65
AUTOMATIC A/C (BLOWER CONTROLS)
6
See Ground
Distribution,
page 14-1.
C-1
STARTER
RELAY
10A
WHT/RED
FUSE/
RELAY
BOX
See Power
Distribution,
page 10.
FL-1
MAIN
80A
DASH
FUSE
BOX
BLK/WHT
(A/T)
WHT/BLU
6
5
X-17
28
B-20
Starter
relay
control
ANTI-
THEFT and
KEYLESS
ENTRY
CONTROL
UNIT
Solid-state:
Do not check
resistance.
1
1
3
B-36
4
VOLTAGE
REGULATOR
1
P-8
WHT/GRN
2
1
H-3
Meter
Assembly
STARTER
RELAY
2
H-13
1
H-14
See Power
Distribution,
page 10.
2
To Dash
Fuse Box on
facing page.
B-36
DASH
FUSE
BOX
HEATER
and A/C
RELAY
WHT
WHT
WHT
WHT
BLK
WHT/RED
WHT/RED
BLU/RED
FUSE/
RELAY
BOX
B-19
GENERATOR
L
Starting
System
WHT/BLK
3
4
X-17
BLK/YEL
Starting
System
WHT
BLK
WHT/RED
H-41
WHT/BLU
WHT/BLU
D
3
2
L
M-25
1
H-8
15
N
R
P
WHT/RED
M-25
4
YEL
RED
AUTOMATIC
TRANSMISSION
MODE SWITCH
CLUTCH
START
SWITCH
Closed with
clutch pedal
depressed.
WHT/GRN
WHT/GRN
A/T
M/T
17
H-12
BLK/WHT
2
B-17
1
B-17
BLK/WHT
WHT/RED
HOT IN START
A
HOT AT ALL TIMES
SX2
SB1
SB20
H-10
15
WHT/RED
WHT/BLU
H-10
16
SX13
BLU
BLU
13
H-12
WHT/GRN
Circuit Schematic
65-1
AUTOMATIC A/C (BLOWER CONTROLS)
I-33
I-32
C-19
BLOWER MTR
25A
BLU
DASH
FUSE
BOX
C-20
(AIR CON)
10A
BRN
HOT AT ALL TIMES
M
BLOWER
MOTOR
1
B-5
2
B-5
C-16
CLOCK
DOME LIGHT
10A
8
RED/WHT
H-48
4
RED/WHT
H-48
BLK
1
2
3
4
I-51
I-51
MAX HI
RELAY
BRN
BLU/BLK
GRY/BLU
GRY/WHT
1
3
2
I-50
I-50
POWER
TRANSISTOR
BLU/BLK
BLK
12
19
17
H-20
1
BLU/BLK
BLU/BLK
BLU/BLK
AUTOMATIC
HEATER-A/C
CONTROL
UNIT
Solid State:
Do not check
resistance.
6
BRN
From Dash Fuse Box
on facing page.
BLU/RED
A
B-2
See Ground
Distribution,
page 14-3.
BLK
BLK
I-32
16
To B on
page 65-2.
BRN
B
To C on
page 65-3.
BRN
C
14
BRN
BRN
Battery
H-26
See Dash
Fuse Box,
page 11-5.
RED/WHT
RED/WHT
RED/WHT
Blower
speed
input
Blower
speed
control
Hi blower
speed
control
Ground
RED/GRN
9
(–)
(+)
Illumination
control
B-2
See Ground
Distribution,
page 14-3.
BLK
BLK
BLK
15
BLK
GRN/RED
10
Dash and
Console Lights
I-32
Dash and
Console Lights
Circuit Schematic
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