2003 HONDA CIVIC Turn signal

Connectors and Harnesses
Dashboard Wire Harness A {Left branchl
Connector or TerminalffiAccessory power socketAudio antennaBrake pedal position switchClutch interlock switchClutch pedal poistion switchCruise control unitCruise main switchDaytime r!nning lights control unitDaytime running lights relayGauge assembly connector AGauge assembly connector BHazard warning switchHeater control panel connector AHeater control panel connector BHVAC push switch assemblyKeyless receiver unitLow beam cut relayOptional security connectorPower mirror switchUnder-dash fuse/relay boxconnector K (see page 22-45)Under'dash fuse/relay box
L {see page 22-45}Underdash fuse/relay boxconnector M lsee page 22'45)Under-dash fuse/relay boxconnector N (see page 22-45)UndeFdash fuse/relay boxconnector O (see page 22-45)UndeFdash fuse/relay boxconnectorY (see page 22 45)c504
c505
c506
c507
c508
c509
c510
22226
3029628
I820111819105327
,I4
12
11
34
1
24
25
2 Under middle of dash2 Under left side of dash4 ] Under left side of dash2 ] Under left srde of dash2 | Under left side of dash14 I Under left side of dash5 Under left side of dash14 Under lett side of dash4 Under lett side of dash22 I Behind gauge assembly22 i Behind gauge assembly10 Behind hazard warnning switch22 Behind heater control panel'14 Behind heater control panel10 ] Behind HVAC switch assembly5 I Under middle of dash5 lUnderleftsideofdash16 Under lefr side of dash13 Under left side oI dash17 ln the under-dash fuse/relay box
CanadaCanada
l0In the under-dash fuse/relay box
In the undeFdash fuse/relay box
In the underdash fuse/relay box
In the under-dash fuse/relay box
In the under-dash fuse/relay box
Under left side of dash
Under left side ot dash
Under left side of dash
Under left side of dash
Under middle of dash
Under middle of dash
Under middle ol dash
Driver's door wire harness(see page 22'40)Driver's door wire harness(see page 22-40)Left side turo signal lightsuonarnessRoof wire harness (see page22 3AlFloor wire harness {see page22-341Floor wire harness (see page22 34JDashboard wire harness B(see oaoe 22-30)
12
12
G501
G503
1
21
Under gauge assembly
Under left side of dash
Body ground via dashboard
Body ground via dashboard
Left Side Turn Signal Light Sub harness
Connector to Harness Index (cont'd)
L
Connector or TerminalCavitiesLocationConnects toNolesLeft side turn signal lightc506353422Behind left side turn signal lightUnder left side of dashDashboard wire harness A
22-26

DASHBOARD WIREHARNESS A
,./
-19
20
34 I
LEFT SIDE TURN SIGNAL LIGHTSUB HARNESS). \'u2s )t
30
(cont'd)
22-27

Connectors and Harnesses
Connector to Harness Index (cont'd)
Dashboard Wire Harness A (Right branch)
Conneclor or TerminalCavitiesLocationConnects toNotesAudio u nit connectorc501
c502
c502
c503
c5'11
c512
c514
ca52
c8533
9
2
6
5
5
4
12
8
10
2010
4
8
5
8
2
6
21
'l
Eehind audio unitUnder right side of dash
Under right side of dash
Under right side of dash
tJnder right side of dash
Under middle of dash
Under middle of dash
Under right side of dash
Under right side of dash
Under right side of dash
Under middle ofdash
Under middle of dash
Engine compartment wireharness (see page 22,18)Engine companmentwireharness (see page 22-18)Engine compartment wireharness (see page 22-18)Engine compartment wireharness (see page 22- 18)ECN4 wire harness (see page22-321Floor wire harness {see page22-341Right side turn signal lightsuonarnessPassenger's door wireharness (see page 22 4l)Passenger's door wireharness (see page 22 4'l)A,/C wire harness (see page22-43)ly'C wire harness (see page22-431
USA
Canada
G502Under right side of dashEody ground via dashboard
Right Side Turn Signal Light Sub harness
Connector orTorminalCavitiesLocationConnectstoNot€sRight side turn signal lightc5't31822Eehind right side turn signal lightUnder rioht side of dashDashboard wire harness A
22-28

Gonnectors and Harnesses
a
Floor Wire Harness {Rear side}(cont'dl
Cargo areaDriver's door switchEVAP emission bypass solenoid valveEVAP emission control canister ventshut valveFuel pump/sending unitFuel tank pressure sensorLeft back-up lightLeft rear ABS wheel sensorLeft rear side marker lightLeft rear speakerLeft rear turn signal lightLeft side seat belt tensionerLeft taillighVbrake lightNoise condenser (rear windowdefogger)Noise condenser (rear window wiper)Passenger's door switchRear window wiper intermiftentcontrolunitRight back-up lightRight taillighvbrake tightRight rear turn signal lightBight rear ABS wheel sensorRight rear side marker lightRight rear speakerRight side seat belt tensioner
c554
Fueltank
FueltankFueltankLeft taillightLeft rear offloorBehind left side of rear bumperLeft quarter panelLefttaillightLeft B-pillarLeft taillightRight quarter panel
Right quarter panelRight B pillarRight q uarter panel
Right tai ightRight taillightRight taillightRight side of cargo area
side of cargo areaLeft B pillarFueltank
Right quaner panel
6224
I32512642A527'13
181011
222021151912117
I
2122
5322222232
232222212
12
2120
Behind right side of rear bumperRight quaner panelRight B-pillarRight quaner panelHatch wire harness (see page22 39)Hatch wire harness (see page
rear seal bdcl Bodv ground vta
Right side of cargo area Body ground via floor wire
Connector to Harness Index (cont'dl
22-36

Under-dash Fuse/Relay Box
SocketRefTerminal Connects to
B
c
D
E
F
G
H
J
K
M
N
o
P
Power window relay
o
R
S
Starter cut relay
T
Taillight relay
Turn signal/hazard relay
U
W (Memory erase signal (MES)
connector)
X
Y
2
3
1
5
19
9
I
20
24
22
27
26
7
6
10
25
14
18
11
l5
to
17
28
5
6
14
13
12
10
3
:
11'10
1:
.o^
;;
4
8
2
i
nl
al
lt
2
Dashboard wire harness B {see page 22-30)
Dashboard wire harness B {see page 22-30)
Dashboard wire harness B (see page 22-30)
ECM wire harness (see page 22-32)
ECI\4 wire harness (see page 22-32)
Engine compartment wire harness (see page 22-'l8l
Engine compartment wire harness (se e page 22-181
Engine compartment wire harness (see page 22-18)
Engine compartment wire harness (se e page 22-18)
Engine compartment wire harness (see page 22-18)
Dashboard wire harness A (see page 22-26)
Dashboard wire harness A (see page 22-26)
Dashboard wire harness A (see page 22-26)
Dashboard wire harness A (see page 22-26)
Dashboard wire harness A (see page 22-26)
Floor wire harness (see page 22-34)
Floor wire harness (see page 22-34)
ECM wire harness (see page 22-32)
Dashboard wire harness B (see page 22-30)
Multiplex control unit service check connector
Optional connector
Optional connector
Floor wire harness (see page 22-34)
{Plugs directly into the multiplex control(Pluqs directlv into the multiDlex control
unat)
unrl)
I
13
tn--rlI U LI L.] L.Jh--n-UL]L]UL]
I] L] L] LI L]
!3 12
22-45

Power Distribution
Fuse to Components lndex
Under-hood Fuse/Relay Box
Fuse
Number
AmpsWire ColorComponent(sl or Circuit(s) Protected
'I204BLUI/ELCondenser fan motor
BLU/REDAy'C compressor clutch
15AWHT/GRNDash lights, Front parking lights, Front side marker lights, License plate
liqht, Rear side marker liqhts, Tailliqhts
7.5AWHT/BLUCarqo area liqht, Ceilinq liqhts. lqnition Kev liqht. Sootliohts
204BLU/BLKRadiator fan motor
510AWHT/BLKTurn siqnal/hazard relav, Turn siqnal liqhts
15AWHT/BLKCKP sensor, ECM, IAC valve, lmmobilizer control unit-receiver, Injectors,
PGM-FI main relav 1 and 2. TDC sensor
715AWHT/GRNBrake lights, Brake signals (to ABS modulator-control unit, Cruise control
unit, ECM)
BLU/REDi1 Orns
820AWHT/GRNABS modulatorcontrol unit
910AWHT/REDAudio unit, Data link connector (DLC), Gauge assembly, lmmobilizer
control unit-receiver, lmmobilizer indicator light. Keyless receiver unil,
lvlultiDlex control unit
1040AWHT/REDABS modulator-control unit
1130AB LK/YE LNoise condenser, Rear window defoqqer
40ABLU^^/HTBlower motor
IJ40AWHT/BLKNo. 7 fuse (in the under-dash fuse/relav box), Power window relav
1440AWHT/REDNo.2 and No.3 fuses (in the under-dash fuse/relav box)
t515AREDI/ELDaytime running lights control unit (Canada), Daytime running lights relay
{Canada), Hioh beam indicator liqht. Left headliqht
16204WHTMultiplex control unit
1715AREDDavtime runninq liqhts control unit (Canada). Rioht headlioht
1860AWHTiBLUEPS control unit
1980ABatterv. Power distribution
2040A'
50A'?
WHTlgnition switch (BAT)
* 1: USA" 2. Canada
O: Spare fuse
t t"| lll Itt 4t I
l l---- E'l E,l E,l r--r r---r t__J i; i6'!/'
E,l E,l E,l Eol E l f__--lI l'lr]n | |I r L__J,a ,..r^{-------l^-,
n[:]$"Lrt " N2, nf - r^l
22-46

Ground Distribution
Ground to Components Index
GroundComponent or circuit qrounded
Batterv, Transmission housinq
E ngine
G 101ECM (PG is BLK; LG is BRN/YEL)
BLK: IAC valve, lgnition coils, Vehicle speed sensor, VTEC solenoid valve
BRNA/EL: Camshaft oosition (CMP) sensor. CKP sensor, TDC sensor. VTEC oil pressure switch
G 15']EPS control unit
G201ELD unit. Multiplex control inspection connector, Multiplex control unit, Power window relay, Rear
window washer motor, Right front parking light, Right front side marker light, Right front turn signal
light, Turn signal/hazard relay, Washer fluid level sensor (Canada) , Windshield washer motor,
Windshield wiDer motor
G202ABS modulator-control unit
G301
G401
Blower motor relay, Brake fluid level switch, Condensor fan motor, Cruise control actuator, Left front
parking light, Left front side marker light, Left front turn signal light, Radiator fan motor, Radiator fan
swrtcn
Combination liqht switch, lqnitlon kev srvitch, Wiper/wasfrer sr,virch
G402Left and riqht airbaq sensors, SRS unit
G 451Data link connector (DLC)
G501Clutch interlock switchm Clutch pedal position switch (for cruise control), Cruise control main switch,
Cruise control unit, Daytime running lights control unit (Canada), Driver's door lock knob switch,
Driver's door lock switch, Driver's power window motor, Heater control panel, Left power mirror
defogger (Canada), left side turn signal light, Moonroof control unit, Monroof open and close relays,
Moonroof position sensor '1, Moonroof seitch, Power mirror switch, Power transistor, Power window
master switch. SDotliqhts
G502Accessory power socket, Gauge assembly, Keyless receiver unit, lvlultiplex control unit, Right power
mirror defogger {Canada)
G503Audio unit
G551Driver's seat belt switch, Fuel gauge sending unit, Fuel pump, Memory erase signal (IMES) connector,
OPDS unit. Rioht seat belt switch
G552High mount brake light, License plate lights, Rear window defogger, Rear window defogger noise
condenser. Rear window wioer motor, Hatch latch switch
Back-up lights, Brake lights, Rear side marker lights, Rear turn signal lights, Rear window wiper noise
condenser, Rear window wiper intermittent control unit, Taillights
22-48

Relays
Power Relay Test
Use this chan to identify the type of relay, then do the
test listed for it.
NOTE: Turn signal/hazard relay input test (see page 22-
87).
RelayTest
A'lC comoressor clutch relavNormally-open
type AAirlfuel ratio sensor relav
Condenser fan relay
Headlioht relav 1
Headliqht relav 2
Horn relav
Power window relay
Radiator Ian relay
Reverse relav
Starter cut relav
Tailliqht relaV
Daytime running lights relay
{Canada )
PGM-FI main relav 1
PGM-Fl main relav 2
Blower motor relavNormally-open
tvpe BRear window defoqoer relav
Moonroof close relayFive terminal
typeMoonroof oDen relav
Low beam cut relav {Canada)
Normally-open type A:
Check for continuitv between the terminals.
. There should be continuity between the No. 1 and
No,2 terminals when power and ground are
connected to the No. 3 and No. 4 terminals.. There should be no continuity between the No. 1 and
No.2 terminals when power is disconnected.
type 1:
type 2:
PGM-FI main relay 1
PGM-FI main relay 2
type 1:
type 2:
(cont'd)
22-51