Honda Civic. Manual — part 627

battery voltage.

An open in the
wire

G18 WHT

Under all
conditions

Check for voltage
between G18
terminal and body
ground: There
should be battery
voltage.

Blown No. 4 (50
A) fuse in the
under-hood
fuse/relay box

An open in the
wire

C3

ORN

Ignition switch ON
(II)

Check for voltage
between C3 and
body ground there
should be battery
voltage.

Faulty ignition
switch

An open in the
wire

E6

BLK

Under all
conditions

Check for voltage to
ground: There
should be less than
0.5 V.

Poor ground
(G602)

An open in the
wire

E33

BLK

Under all
conditions

Check for voltage to
ground: There
should be less than
0.5 V.

Poor ground
(G601)

An open in the
wire

F20

BLK

Under all
conditions

Check for voltage to
ground: There
should be less than
0.5 V.

Poor ground
(G401)

An open in the
wire

T34

BLK

Under all
conditions

Check for voltage to
ground: There
should be less than
0.5 V.

Poor ground
(G501)

An open in the
wire

Combination light

Check for voltage
between S1 and S5
terminals: There

Faulty
combination light
switch

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Exterior Lights - Civic (All Except Hybrid)

S1

ORN

switch OFF

should be less than 1
V.

An open in the
wire

Combination light

switch in any other

position than OFF

Check for voltage
between S1 and S5
terminals: There
should be 5 V or
more.

Faulty
combination light
switch

Short to ground in
the wire

S11

PNK

Combination light
switch (Headlight
position) ON

Check for voltage
between S11 and S5
terminals: There
should be less than 1
V.

Faulty
combination light
switch

An open in the
wire

Combination light

switch OFF

Check for voltage
between S11 and S5
terminals: There
should be 5 V or
more.

Faulty
combination light
switch

Short to ground in
the wire

S12

RED

Combination light
switch lever pulled
(Passing)

Check for voltage
between S12 and S5
terminals: There
should be less than 1
V.

Faulty
combination light
switch

An open in the
wire

Combination light

switch lever

released from

passing position

Check for voltage
between S12 and S5
terminals: There
should be 5 V or
more.

Faulty
combination light
switch

Short to ground in
the wire

Combination light
switch (SMALL
position) ON

Check for voltage
between S13 and S5
terminals: There
should be less than 1
V.

Faulty
combination light
switch

An open in the
wire

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Exterior Lights - Civic (All Except Hybrid)

COMBINATION LIGHT SWITCH TEST/REPLACEMENT

1. Remove the dashboard lower cover (see DRIVER'S DASHBOARD LOWER

COVER REMOVAL/INSTALLATION ).

2. Remove the steering column covers (see STEERING COLUMN

REMOVAL AND INSTALLATION ).

3. Disconnect the 12P connector (A) from the combination light switch (B).

S13

GRY

Combination light

switch OFF

Check for voltage
between S13 and S5
terminals: There
should be 5 V or
more.

Faulty
combination light
switch

Short to ground in
the wire

S16

LT

BLU

Combination light
switch (Dimmer) in
high beam position

Check for voltage
between S16 and S5
terminals: There
should be less than 1
V.

Faulty
combination light
switch

An open in the
wire

Combination light

switch (Dimmer) in

low beam position

Check for voltage
between S16 and S5
terminals: There
should be 5 V or
more.

Faulty
combination light
switch

Short to ground in
the wire

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Exterior Lights - Civic (All Except Hybrid)

Fig. 17: Disconnecting 12P Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Remove the two screws, then slide out the combination light switch.
5. Inspect the connector terminals to be sure they are all making good contact.

If the terminals are bent, loose or corroded, repair them as necessary, and
recheck the system.

If the terminals look OK, check for continuity between the terminals in
each switch position according to the tables.

If the continuity is not as specified, replace the switch.

Light switch:

Fig. 18: Checking Continuity Between Light Switch Terminals Chart
Courtesy of AMERICAN HONDA MOTOR CO., INC.

2008 Honda Civic LX

2006-08 ACCESSORIES & EQUIPMENT Exterior Lights - Civic (All Except Hybrid)