1999 HONDA CIVIC Ground

How the Circuit Works
The two outside mirrors are controlled by the power
mirror switch. Each mirror has two reversible
motors: one motor moves the mirror up and down
and the other motor moves the mirror lett and right.
The power mirror switch contains four switches to
control mirror adjustment, and two switches to
select the left or right mirror With the ignition in ON
(ll), battery voltage is supplied to the power mirror
swrtch. The mirror selector switch directs voltage
from two of the direction switches to either the left
or the right mirror.
Mirror Up
When you press the "up" edge of the mirror
adjustment button, ground is supplied from one of
the up/down switch contacts to both mirrors; battery
voltage is supplied from the opposite up/down
switch contact through the mirror select switch. lf
the mirror select switch is in the left or right position,
battery voltage is supplied to the corresponding
mirror uo/down motor which then tilts the selected
mtrror uD.
Mirror Down
When you press the "down" edge of the mirror
adjustment button, battery voltage is supplied Irom
one of the up/down swilch contacts to both mirrors;
a ground is supplied from the opposite up/down
switch contact through the mirror select switch. lf
the mirror select switch is in the left or right position,
battery voltage is supplied to the corresponding
mirror up/down motor which then tilts the selected
mrrror oown.
Mirror Left
When you press the "|eft" edge of the mirror
adjustment button, battery voltage is supplied from
one of the lefuright switch contacts to both mirrors;
a ground is supplied from the opposite lefuright
switch contact through the mirror select switch. lf
the mirror select switch is in the left or right position,
battery voltage is supplied to the corresponding
mirror lefvright motor which then tilts the selected
mirror to the lett.
Mirror Right
When you press the "right" edge of the mirror
adjustment button, ground is supplied from one of
the lefvright switch contacts to both mirrors; battery
voltage is supplied from the opposite left/right switch
contact through the mirror select switch. lf the mirror
select switch is in the left or right position, battery
voltage is supplied to the corresponding mirror
lefuright motor which then tilts the selected mirror to
the right.
Refer to the Service Manual (Section 23, Electrical)
for speclfic tests of troubleshooting procedures
141-1

Power Mirrors
- With Defogger
ORN/
i I ;;;
- - - - - -
I HJ.o.',8.3.f;,"
i )tlf*"'*" geePower if,g}"",
!-,i::-i4tir-J
f 9;%.,BLKBLU I V'EW55
'o l9,;%,,BL(/B!U I V/EW 46
a
T'|[
aaa
OFN/
24
ORN/
BLU/RED
--
YEL/FED
20
--
BLUA!/HT
21cs56
OBN/WHf
c639 4
vtEw23 FEO
c557
vlEw 62
c656
ORN
BLK/
BLK
LEFT BLKryVHTPOWER 3MTRROR BLK
".* |..- Gs52
".^ |... G551
c639
vlEw2i
See Ground Distribution,page 14-8.
c656
vlEw 24
See Ground Dislribution,page 14-9.
Minor Selecto.SwitchO = Neutral1 = Lelt2 = Rlght
',41-2

How the Circuit Works
The two outside mirrors are controlled by the power
mirror switch. Each mirror has two reversible
motors: one motor moves lhe mirror uo and down
and the other motor moves the mirror left and right.
The power mirror switch contains four switches to
control mirror adjustment, and a switch lo select
the left or right mirror. With the ignition ON (ll),
battery voltage is supplied to the power mirror
switch. The mirror selector switch directs voltage
Irom the direction switches to either the left or rioht
mtrror.
Mirror Up
When you press the "up" edge of the mirror
adjustment button, voltage is supplied from one of
the UP switch contacts to both mirrors. With the
mirror select switch in the LEFT or RIGHT Dosition.
ground is provjded for the corresponding up/down
motor through the opposite UP switch contact.
Battery voltage is supplied to the mirror up/down
motor which then tilts the selected mirror uo.
Mirror Down
When you press the "down" edge of the mirror
adjustment button, ground is provided through one
of the DOWN switch contacts to both mirrors.
With the mirror select switch in the LEFT or RIGHT
position, voltage is supplied to the corresponding
up/down motor through the opposite DOWN switch
contact. Battery voltage is supplied to the mirror
up/down motor which then tilts the selected
mtrror down.
Mirror Left
When the mirror select switch is in the LEFT or
RIGHT position, and you press the "lett" edge of the
mirror adjustment button, voltage is supplied to both
corresponding mirror motors through one of the
LEFT switch contacts. Ground is provided for the
corresponding lefvright motor through the opposite
LEFT switch contact, 8attery voltage is supplied to
the mirror left /right motor which then tilts the
selected mirror left.
I,J
141-3
Mirror Right
When the mirror select switch is in the LEFT or
RIGHT position, and you press the '?ight" edge of
the mirror adjustment button, ground is provided to
both corresponding mirror motors through one of
the RIGHT switch contacts. Voltage is supplied to
the corresponding leruright motor through the
opposite RIGHT switch contact. Battery voltage is
supplied to the mirror left /right motor which then
tilts the selected mirror right.
Mirror Detoggers
With the ignition switch in ON (ll), battery voltage is
supplied to the mirror defogger switch. When you
press the mirror defogger switch ON, voltage is
supplied to both mirror defoggers, causing them to
heat up and remove any fog from the mirrors. The
opposite side of each defogger grid is connected to
g rou no.
Refer to the Service Manual (Section 23,
Body Electrical) for specific tests and
troubleshooting procedures.

Accessory Power Socket
-.t UNDER-DASH
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t__tglll__J"
[ffi']''
i
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I
,I
l'-l-l AccEssoRY
lQli{y#lfr
See GroundDistribution,page 14-7.
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L__l#: c4o1PHAfa 57
155

\7. C604 (Hatchback)
GRN/BLK(Back-up lights)
l\4ale GRNIYELFemale - GRN/RED(Turn signaland hazardwarning lights)
BLK (G601)
- Gray- Left rear ol cargo area- Connects rear wire harness to left outer
taillight assembly
4
5
6
1
2
GRNAVHT(Brake lights)
FED/BLK(Headllght switch)
10. Exhaust Gas Recirculation
(EGR) Valve and Lift Sensor
1
2
3
(D16Y5 MfI D1685)
- Gray- Top right side of engine- On engine wire harness
WHT/BLK (EGR input)
GRN/BLK(Sensor ground)
YEUBLU(Reference voltage)
4
5
6
BLK (Ground)
PNK (EGR control)
of cargo area
rear wire harness to right outer
assembly
n- -n
a t | _ a2a
l3I4t5tttl
IJ
I
8. C605 (Hatchback)
- Gray- Right rear- Connects
taillight
GRN/BLK(Back-up lights)
GRNTYEL(Turn signaland hazardwarning lights)
3
4
5
6
1
2
BLK (G601)
GFNAVHT (Brake lights)
RED/BLK(Headlight switch)
11. Heater Fan Switch
('96-'98 Models)
- Brown
Center of dash- On heater-sub B wire harness
BLK (Ground)
BLUAVHT (L4edium
LO speed input)
BLU/BLK(Hl speed input)
4
5
6
1
2
3
BLU (LO speed input)
BLU/YEL (Medium
Hlspeed input)
GFIN (Blowerswitch ON input)
9. C607 (Hatchback)
- Blue- Right side o{ cargo area- On rear wire harness
BLU/BLK (lndicators)
RED/BLK(License lights)
GBN,ryVHT (8rake lights)
LT GBN(Rear wiper/washe0
5
6
1
2
3
4
GRN(Rear wiper/washer)
LT GRN/BLK(Rear \/iper washer)
)/
202-3
12. Security Starter Cut Relay/C416
- Natural* Upper left kick panel- On main wire harness
1
2Allexcept CX and DXI[,4ale: BLK,^r'r'HTFemale: BLKI/ELCX and DXi BLI(WHT(Battery input)
All except CX and DX:BLK^/ELCX and DX: BLK/WHT(Baftery input)
[.4ale - BLK/WHTFemale - BLKAVHTor BLKRED(Starter output)
All excepi CX and DX:RED/YELCX and DX: GRN(Security starter c!1relay control inpul)
5
6
tl3'

Connector Views (cont'd)
13. Moonroof Close Relay
'96-97 Models:
1 WHT (Battery input)
2 GRN//EL
{Motor conirol)
3 GRN/ORN(lgnition lnput)
- Brown ('96-'97 models) or Gray ('98-'00 models)- Upper left kick panel- On moonroof wire harness
5
6
BLK (Ground)
GBN/RED (Coilconkol)
'98r00 Models:
GRN/YEL(Motor control)
WHT (Battery input)
GRN/RED(Coil control)
4 BLK (G401)
5 GRN/ORN(lgnition input)2
3
15. Moonroof Open Relay
- Brown ('96-'97 models) or Gray ('98-'00 models)- Upper left kick panel- On moonrool wire harness
'96.97 Models:
1 WHT (Battery input)
2 GRN/FED(lvlotor control)
3 GRN/ORN(lgnition input)
'98r00 Modelsi
BLK (Ground)
YEL (Coil conkol)
5
6
GBN/RED(lvlotor control)
WHT (Battery input)
YEL (Coil control)
4 BLK (G401)
5 GRN/ORN(lgnition input)2
3
,1^t
6
14. C415
- Brown- Above underdash fuse/relay box- Connects main wire harness to steering lock pigtail
* 1: [,4ale BLKryELFemale - BLKMHT*2: BLK,/WHT(Start oulput)
l\.4ale - BLU/REDFemale - BLUruVHT(lgnilion key switchoutpur)
N4ale - WHT/BLKFemale - WHT(Battery input)
l\,4ale BLKFemale - BLU^VHT(Ground)
Ani Male - WHTFemale - WHT /EL
(Key interlock switchourpur)
A/T:WHT/BLU(Key interlocksolenold control)
A"rT: WHT/GRN(Battery inpul)
*1= Vehicles pre-wired for accessory security system*2= Vehicles not pre wired for accessory security system
202-4
16. C422
- Green- On tront ol under-dash tuse/relay box- On main wire harness
7
l
2
3
4
5
6
7
FED/BLU (Headlights)
REDAVHT (Headlights)
WHT (Fuse 48)
BED/GRN(Headlight switch)

-17. Mode Control Motor
- Green- Behind dash, right of steering column- On heater sub-harness-A
1 BLK,TYEL (lgnition input)
2 YEUBLU (Detrost input)
3 YEL (H/DEF input)
4 BLUA/VHT (Heat input)
5 GRN/YEL (BI-LEV input)
YEURED (Vent input)'96.98: BLK (G402)'99-'00r BRNAVHT
{Motor ground input)
6
7
18. PGM-FI Main Relay
- Brown- Behind right side o{ dash- On main wire harness
'l
4
1 GRN/YEL(Fuel pump control)
2 BLUAVHT (Fuse 31)
3 BLK (G101)
*1: YEUGRN(Fuel pump output)*2: WHT/RED(Fuel supply control)
YEUGRN (Fuse 13)
YEUBLK (Power output)
WHT/BLK (Fuse 44)
6
7
*1= All except Dl685*2= D16Bs
19. Cl23 (D16Y5 M/T)
2
3
BLI(WHT
{Heater control)
BLK (Heater ground)
GRN/BLK(Sensor ground)
- cray- Right tront o{ engine- Connects engine wire harness to primary
HO2S pigtail
5
6
7
8
WHT (Hgater control)
WHT (Sensor input)
BLK (Sensor input)
RED (Sensor ground)
20. c136
- Gray- Left rear of engine compartment- Connects engine wire harness to main wire harness
'96198 D't6Y5:
1 Male - BLUAVHTFemale - BLU|/EL(A"/T controls)
2 GRN,^WHT (A,/T controls)
3 YEL (A/T controls)
4 GRN/YEL (A/T controls)
5 PN(BLK (fff gs6lrq;s;
6 PNI(BLU (A/T controls)
7 GRN/BLK (Ar/T controls)
8 RED/BLU (A/T controls)
9 WHT (A/T controls)
'96198 D16Y7/D16Y8:
GRN/BLK (A/T controls)
WHT/RED(lnterlock system)
10 WHT/RED (A"/T controls)
11 '98 models: GRN/BLK(PGr,4-Fr)
12 GRN (A/T controls)
13 l\4ale - REDMHTFemale - RED/BLU(4,/T controls)
14 N4ale - BLIVWHTFemale - ORN/BLU(A/T controls)
5 WHT (A/T controls)
6 BLU (Antf se11re;s;
7
A

01685:
3
1
2
3
4
5
6
7
8
BRN (PGM-FD
RED (PGIV-FD
BLU (PGI\4-FD
YEL (PGI,4,F|)
l\4ale - GFNFemale - WHT/RED(PGM-FD
GRN/BLK (A'tl gs6trels;
BLU (A/T controls)
wHT (A/I controls)
202-5

21. C214
- Gray- Right side of engine compartment- Connects engine wire harness to main wire harness
'96- 97 models:Male - WHT/GRNFemale - BLU/FED(Horn)'98-'00 models:BLU/RED (Horn)
BLKRED (Fans)
WHT (Fans)
4
5
6
7
*io t0,,"compressor controls)
BLU/RED (A,/C
compressor controls)
BLU,ryVHT (I'/C
compressor controls)
2
3
23. C639
- Black,ryVhite- Top front ot driver's door- Connects driver's door wire harness to driver's
power mirror pigtail
Without Defogger:
1
2
4
6 Male - LT GRNFema|e - BLU/BLK(Left/right control)
With Oelogger:
1
2
3 l\,lale - BLKAVHTFemale - BLK(Ground)
4 lvlale - BLU/REDFemale ORNAVHT(Delogge4
lvlale PNKFemale - YEURED(Common)
MaIe _ GRYFemale BLUA/VHT(Up/down control)
lvlale - LT GRNFemale BLU/BLK(Corrmon)
i.4ale - PNKFemale - YEURED(Up/down conkol)
Male - GRYFemale - BLU,ryVHT(Lett/right control)
22. C552
- Green- On rear of under-dash fuse/relay box- On tloor wire harness
1 *1: FEDA/VHT(Power windows)
2 *1: YEL/BLK(Power windows)
3 *1:YEL/BLK
(Power windows)
4 *1 | RED/WHT(Power windows)
*1= Sedan only*2='96''98:All'99-'00r GX
6
7
GRN/BLK(Power windows)
GRN/BLK(Power windows)*2: BLK/YEL(Power mifiors)
BLU/BLK
{Power windows)
202-6
24. C556
- Black,ryVhite- Top front of front passenger's door- Connects tront passengefs door wire harness
to passenger's power mirror pigtail
Without Defogger:
l
2
3 l\4ale -
Female BLK(Not Used)
4 l\4ale -
Female - ORN/WHT(Not Used)
With Delogger:
1
2
3 Male - BLK^VHTFemale - BLK(Ground)
4 l\.4ale - BLU/REDFemale - ORNAVHT(Defogger)
Male OBNFemale - YEUBLK(LefVright control)
l\4ale - PNKFemale - YEL/RED(Common)
Male BRNFemale - GRNA/VHT(Up/down conkol)
[.4ale - ORNFemale - YEL/BLK(Left/right control)
lrale - PNKFemale - YEURED(Up/down conkol)
l\,lale - BFNFemale'GFiN(Common)