2003 HONDA CIVIC fuse box

Power Windows
1.
2.
Passenger's Window Switch Input Test
Remove the switch panel (see page 20-4).
Disconnect the 5P connector (A) from the switch (B).
o
'' "'"1.
4.
Wire side of female terminals
BLU/WHTGRN/BLK
Input the connector and socket terminals to be sure they are all making good contact.
. lf theterminals are bent, loose or corroded, repairthem as necessary, and recheckthe system.. lf the terminals look OK, go to step 4.
Reconnect the connector, and using a back probe, make these input tests at the connector. lf any test indicates aproblem, find and correct the cause, then recheck the svstem,
CavitvWireTest conditionTest: Desired resultPossible cause if result is not obtained
3GRN/BLKlgnition switch ON
{ ll)
Check for voltage to
grouno:
There should be battery
voltage.
Blown No.6 (7,5A)fuse in the
under-dash fuse/relay box
Blown No.22 {20A)fuse in the
under-dash fuse/relay box
Faulty power window relay
An open in the wire
Poor qround (G201)
2BLD,A/VHTlgnition switch ON( )
At the master
window switch,
press and hold
down the
passenger's switch
Check for voltage to
ground:
There should be battery
voltage.
Faulty master window switch
An open in the wire
BLU/REDlgnition switch ON(||)
At the master
window switch,
pull up and hold
the passenger's
switch
Check for voltage to
grouno:
There should be battery
voltage.
Faulty master window switch
An open in the wire
22-130

Wipers/Washers
Component Location Index
WINDSHIELD WIPER MOTORTest, page 22-'143Replacement, page 22-145
WINDSHIELD WIPER ARMS and LINKAGEReplacement, page 22-'145
WIPER/WASHER SWITCHTest, page 22-140Replacement,page 22 140
UNDER.DASHFUSE/RELAY BOX
INTERMITTENT WIPER CIRCUITlln the multiplex control unit)Input Test, page 22-138
22-134

\
4. With the connector still disconnected, makethese input tests at the con necrors.
.lfanytestindicatesaproblem,findandcorrectthecause,thenrecheckthesystem.
' lf all the input tests prove OK, the control unit must be faultv. Replace it.
CavitvWireTesl conditionTest: Desired resultPossible cause if result is not obtainedGRNlgnition switch ON
flr)
Check for voltage to ground:
There should be battery
voltaqe.
. Blown No.9 (10A)fuse in the
under-dash fuse/relay box. An open in the wire10BLKUnder all
conditions
Check for continuity to
grouno:
There should be continuitv.
Poor ground (G553)
An open in the wire
6WHT/REDlgnition switch ON(ll) and rear
window washer
switch ON
Check for voltage to ground:
There should be battery
vortage.
Blown No.9 (10A) fuse in the
under-dash fuse/relay box
Faulty rear wlndow wiper/
washer switch
An open in the wire4LT GRN/
RED
lgnition switch ON(ll) and rear
window wiper
switch ON
Attach to groundl
The rear window wiper motor
should run.
LT GRNlgnition switch ON
flr)
Attach to ground:
The rear window wiper motor
should run.
Blown No. 9 (10A)fuse in the
under-dash fuse/relay box
Faulty rear window wiper motor
An open in the wire20LT GRN/
BLK
lgnition switch ON(ll)Check for voltage to ground:
There should be battery
voltage.
Blown No.9 (10A) fuse in the
under-dash fuse/relay box
Faulty rear window wiper motor
An oDen in the wire
22-139

Control Unit Input Test
l.Before testing, troubleshoot the multiplex control system lsee page 22-jj2).
Remove the dashboard lower cover,
Disconnect the under-dash fuse/relay box connectors B, G, J, X and y
NOTE: All connectors are wire side of female terminals.
UNDER-DASH FUSE/RELAY BOXCONNECTOR B I6PIUNDER.DASH FUSE/RELAY BOXCONNECTOR G {1OP)
2.
3.
UNDER-DASH FUSE/RELAY BOXCONNECTOR J {8PI
l-,1 - llTtlF_j-JF-#
141516 7l8l
WHT/BLU
\
l-,1 - l-rl€ll
lslrlzlol
\BLU/RED
UNDER.DASH FUSE/RELAY BOXCONNECTOR X I8PI
4. Inspect the connector and socket terminals to be sure they are all making good contact.
. lf the terminals are bent, loose or corroded, repairthem as necessary, and recheckthe system.. lf the terminals are OK, goto step 5.
(cont'd)
BLU/WHT
BLU/BLK
22-141

Wipers/Washers
Control Unit Input Test (cont'dl
5. Reconnect the connectors, and make these input tests at the connector.
.lfanytestindicatesaproblem,findandcorrectthecause,thenrecheckthesystem.
.lfalltheinputtestsproveOK,themultiplexcontrol unit must be faulty. Replace the under-dash fuse/relay box
assembly.
CavityWireTest conditionTest: Desired resultPossible cause if result is not obtained
J4BLKU nder all
conditlons
Check for voltage to ground: . Poor ground (G501)
There should be 1V or less. . AnoDeninthewire
Y6BLKU nder all
conditions
Check for voltage to ground: . Poor ground (G502)
There should be 1 V or less. . An oDen in the wire
BIWHTiBLUlgnition switch ON
{ll) and washer
switch ON
Check for voltage to ground:
There should be battery
vortage.
Blown No. 20 (20A) fuse in the
under-dash fuse/relay box
Faulty wiper/washer switch
An open in the wire
E'0BLU/REDlgnition switch ON
(ll) and wiper
switch OFF (wiper
motor stopped)
Check for voltage to ground:
There should be battery
voltage.
Blown No. 20 (20A) fuse in the
under-dash fuse/relay box
Faulty wiper/washer switch
Faulty windshield wiper motor
An open in the wire
G7BLUA/VHTlgnition switch ON(ll) and wipers in
park position
Check for voltage to ground:
There should be battery
voltage.
Blown No.20 (20A)fuse in the
under-dash fuse/relay box
Faulty windshield wiper motor
An ooen in the wire
x1BLU/BLKlgnition switch ON(ll) and wiper
switch in INT
Check for voltage to ground:
There should be battery
voltage.
Blown No.20 (20A)fuse in the
under-dash fuse/relay box
Faulty wiper/washer switch
An oDen in the wire
\J
\J
L
22-142
J

Accessory Power Socket
Circuit Diagram
22-149
Accessory Power Socket Test/
Replacement
1.
4.
Carefully pry the accessory power socket (A) out
from the center lower cover.
Disconnect the 2P connector (B) from the socket.
Inspect the connector terminals to be sure they are
all making good contact.
. lf the terminals are bent, loose orcorroded,
repairthem as necessary, and recheck the
system.. lf the terminals look OK, go to step 4.
Turn the ignition switch ACC (l), and check for
voltage between the No. 'l and No. 2 terminals.
. There should be battery voltage.. lf there is no banery voltage, checkfor:- poor ground {G502).- an open in the wire.- blown No. 18 (15A)fuse in the under-dash
fuse/relay box.

J\Circuit Diagram
UNOEE DASHfUSE/SELAYBOXUiDEN HooD FUSE/RETIY 8OX
UI'IDE8 DASH f USE/RETAY 80X
/ 8Ar \-) cl- lG1 ,/
lG1 HoT in 0N (lllaidSTAfft(llll
JI
000RLoc( KNOE
tl
xtY \"2
t'-F>Li___J-
(cont'd)
22-151
l3
IT
IBLK
I
G502
MULTIPUX CONTNo! Uflfi
PASSTNGtrS0008100(ACTUATOi
DBt!'t8'S000R 100(ACTUATOB
t

Keyless/Power Door Lock System
Keyless Receiver Unit Input Test (cont'dl
With the connector still disconnecled, make the input test at the connector.
.lftestindicatesaproblem,findandcorrectthecause,thenrecheckthesystem.
. lf the inputtest proves OK, goto step 6.
Reconnect the 5P connector, and make these input tests at the connector.
.lfanytestindicalesaproblem,findandcorrectthecause,thenrecheckthesystem.
. lf all the inputtests prove OK, replacethe keyless receiver unit.
CavityWireTest conditionTest: Desired resultPossible cause il result is not obtained
2BLU/ORNUnder all
conditions
Check for continuity between
the No.2 terminal and the
No. 2 terminal ofthe
under-dash fuse/relay box
connector K { 17P).
There should be continuitv.
An open in the wire
CavitvWireTest conditionTest: Desired resultPossible cause if result is not obtained
1BLKUnder all
conditions
Check for voltage to ground:
There should be 1 V or less.
. Poor ground (G502)
. An oDen in the wire
YELlgnition switch
oN (||)Check for voltage to ground:
There should be battery
voltaqe.
Blown No. 10 {7.5A) fuse in lhe
under-dash fuse/relay box
An ooen in the wire
WHT/REDUnder all
conditions
Check for voltage to ground:
There should be battery
voltaqe.
' Blown No.9 (10A) fuse in the
under-hood fuse/relay box. An ooen in the wire
22-154