1999 HONDA CIVIC bulb

Cruise Gontrol
3.
1.
2.
Main Switch Test/Replacement
Remove the driver's dashboard lower cover (see sec-tion 20).
Carefully push out the switch from behind the dashboard.
Disconnect the connector from the swtrcn.
MAIN SWITCH
BULBS {0.84 Wt
Check for continuity between the terminals in eachswitch position according to the table.
lf there is no continuity. reDlace the switch.
4.
Terminal
r**
--\235
OFFo--oGa\-o\:./\a/
ONo-/a-oo--o\:/\:/
23-244
Set/Resume Switch
5.
Test/Replacement
2.
1.
MAIN WIREHARNESS3P CONNECTOR
Make sure you have the anti-theft code for theradio, then write down the frequencies for theradio's preset buttons. ('99 - 00 models).Disconnect the battery negative cable, then discon-nect the positive cable, and wait at least three min-utes.
Disconnect the driver's airbag connector (see sec-tion 24).
Remove the dashboard driver's lower cover (see sec,tion 20).
Disconnect the cable reel sub harness 3p connectorfrom the main wire harness.
CABLE BEELSUB-HARNESS3P CONNECTOS
Terminalside ofmale terminals
Check for continuity between the terminals of thecable reel sub-harness 3P connector in each switchposition according to the table.
L Terminal
Position123
SET (ON}o----o
BESUi,|E IONIo-----o
lf there is continuity, and it matches the table,the switch is OK.
lf there is no continuity in one or both positions,
go to step 7.

)
l-l
Disconnect the A and B connectors from the audio unit.
Cavity WireTest conditionTest: Desired resultPossible cause if result is not obtained
Reconnect the B connector only to the audio unit.
Cavity WireTest conditionTest: Desired resultPossible cause iI result is not obtained
B9GRN/ORN
Driver's door lock
switch in UNLOCK
Check for voltage to ground:
There should be 1 V or less.
. Poor ground 1G551). Faulty driver's door lock switch. An open in the wire. Short in the wireDriver's door lock
switch in LOCK
Check for voltage to grou nd:
There should be 4 V or more.
810G R NAr'r'HT
Driver's door lock
switch in UNLOCK
Check for voltage to ground:
There should be 4 V or more.
. Poor ground (G551)
. Faulty driver's door lock switch. An open in the wire. Shon in the wireDriver's door lock
switch in LOCK
Check lor voltage to ground:
There should be I V or less.
23-263
A4WHT/BLU
LJnder all conditionsCheck {or voltage to ground:
There should be battery voltage.
. Blown No. 47 (7.5 A) tuse in the
under hood fuse,i relay box. An open n the w re
A5YEL/RED
lg nition swirch ACC (l)Check for voltage to ground:
There should be battery voltage.
Blown No. 28 , I0 A) f use in the
under dash fuse.elay box
An open " :ne n re
Check for voltage to ground:
There should be battery voltage.
Check for continuity to groundr
There should be continuity.
B o$. \. '.1 - 5 A' iuse n the
,,^oe' aas_'-se relay box
A_ ooe^ ' :ne wrre
Pc.' E'o--d rG401, G402)
A- ooen n lhe wire
B6B LK,/YE L
lgnition switch ON0l)
8158LK
Under all conditions
B1BLU/RED
lgnition key inserted
into the ignition key
swrtch
Check for voltage to ground:
There should be 1 V or less
Check for voltage to ground:
There should be 4 V or more
Poor ground (G401, G402)
Faulty ignition key switch
An open in the wire
Short in the wire
An open in the wireCheck for continuity berwee. lFe
audio unit 16P connector l-o 3ler-
minal and power door lock control
unit 12P connector No. 6 lermrnal:
There should be continu ty
lgnition key removed
from the ig nition key
swtlcn
B3B LUlt/E L
U nderall conditions
B8LT GRN/
BLK
Ceiling light switch in"middle position"
Connect to ground:
The ceiling lighr shouldcome on.
Blown No.43 (7.5 A) fuse in the
under-hood Iuse/relay box
Blown ceiling light bulb
Fau lty ceiling light
An open in the wire
814LT GRN/
RED
Each door open, one at
a time
Check tor voltage to ground:
There should be'l V or less.
. Faulty door switch. An open in the wire
Br6GRY
U nderall conditionsConnect to groundl
Horn should sound.
. Blown No. 52 ('15 A) fuse in the
under-hood fuse/relay box
. Fau lty horn. Faulty horn relay. An open in the wire

Troubleshooting
The SRS Indicator Light Doesn't Come On
CAUTION: Whonever ths ignition switch is ON {ll}, or
has been turned OFF tor less than three minutes. be
careful not to bump the SRS unit; the airbagls) could
accidentally deploy .nd caus6 damage or iniuri€s.
Check tho pow€r supply (fuse):
Turn the ignition switch ON (ll), and check whether the otherindicator lights come on (brake system, etc.).
Oo the other indicator liohts como on?
YESNO
Check th6 fuso:Check the No. 25 {7.5 A) fuse in the under-dash tuse/relayb"t
ls th6 tu36 OK?
NOYES
Check the bulb:Replace the No. 25 (7.5 A) fuse, and check that theSRS indicator light comes on.
Doos the SRS indicator liqhl come on7
I YES No
END
Check tho wire harns b€twecn fus6 and gauge aasambly:Check for an open in the wire harness between luseNo. 25 {7.5 A) and the gauge assembly, and repair. Checkthat the SRS indicator light comes on.
Doo. tho SRS indic.tor light como on?
I yEs No
I
END
Check tho SRS indicator light bulb:1. Turn the ignition switch OFF.2. Remove the gauge assembly.3. Check for blown SRS indicator light butb.
ls the SRS indicator light bulb OK?
NOYES
Ch.ck the SnS indicator liglrt circuit:Replace the bulb, and reconnect the gauge assemblyconnectors. Then turn the ignition switch ON {ll}.
Ooes th6 SRS indicato. llght come on?
I YEs No
:ND
lAl To page 24-27
24-26
lB'J fo page 24-27
))
No. 25 (7.5 Al FUSE

Five-Step Troubleshooting
L Verify The Complaint
Turn on all the components in the problem
circuil lo check the accuracy of the customer
complaint. Note the symptoms. Do not begin
disassembly or testing until you have
narrowed down the problem area.
2. Analyze The Schematic
Look up the schematic for the problem
circuit. Determine how the circuit is
supposed to work by tracing the current
paths lrom the power source through the
circuit components to ground. Also, trace
circuits that share wiring with the problem
circuit. The names of circuits that share the
same fuse, ground, or switch, and so on, are
referred to in each circuit schematic. Try to
operate any shared circuits you didn't check
in step 1 . lt the shared circuits work, the
shared wiring is OK, and the cause must be
in the wiring used only by the problem
circuit. lf several circuits fail at the same
time, the fuse or ground is a likely cause.
Based on the symptoms and your
understanding of the circuit's operation,
identify one or more possible causes.
3. lsolate The Problem By Testing The Circuit
Make circuit tests to check the diagnosis
you made in step 2. Keep in mind that a
logical, simple procedure is the key to
efficient troubleshooting. Test for the most
likely cause of failure first. Try to make tests
at points that are easily accessible.
4. Fix The Problem
Once the specific problem is identified,
make the repair. Be sure to use proper tools
and safe procedures.
5. Make Sure The Circuit Works
Turn on all components in the repaired
circuit in all modes to make sure you've
fixed the entire problem. ll the problem was
a blown fuse, be sure to test all of the
circuits on that fuse. Make sure no new
problems turn up and the original problem
does not recur.
Test Equipment
Most circuits include solid-state devices.
Test the voltages in these circuits only with
a 1o-megaohm or higher impedance digital
mUltimeter. Never use a test light or analog
meter on circuits that contain solid-state
devices. Damage to the devices may result.
Test Light and DVOM
On circuits without solid-state devices, use a
test light to check for voltage. A test light is
made up of a 12 volt bulb with a pair of leads
attached. After grounding one lead, touch the
other lead to various points along the circuit
where voltage should be present. The bulb
will go on if there is voltage at the point being
tested. lf you need to know how much
voltage is present, use a digital
volVohmmeter (DVOM).
Self-Powered Test Light and DVOM
Use a self-powered test light to check for
continuity. This tool is made up of a light bulb,
battery, and tlvo leads. To test it, touch the
leads together: the light should go on.
Use a self-powered test light only on an
unoowered circuit. First, disconnect the
battery, or remove the fuse that feeds the
circuit you are working on. Select two points
in the circuit belween which you want to
check continuity. Connecl one lead of the
self-powered test light to each point. lf there
is continuity, the test light's circuit will be
completed, and the light will go on.
SELF-POWERED TEST LIGHT
lf, in addition, you need lo know exacW hc'.
much resistance there is between two oo'^=
use a digital volUohmmeter (DVOM)
acdrt'Cn
t1

- '99-'00 Models
NOTE: Fuse 31 isJtot with lgnition Switch in START (lll) and clutch pedal depressed or A,,/T gear selector inPARK (P) or NEUTRAL (N), see Starting System, page 21 ,2i-1, ot 21-2.
UNDER"DASHFUSEiRELAYBOX
I
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I
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I erouna
BrakeBulbChsckCheuh
NTEGNATEDcot{TRoLUNITftoa 64vEw a7
I Bi?[lT':i,
S€6 GroundDistribution,pago 14-7.I
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c420PHO|O 6ivtEw 53
c551PHOfA 63c419PHO|O 63 |(r;'Used)
1514
r----4(--.1 DAYnMEI q* * |RUNN|NG
Llt:i-ib'f#Iu'"'' i---Y -- """* i
FED/GFN I c419 :
18 Jl iE?'8' :f ?-'! uloen-oasx 'I I I FUSE/RELAY
| | lP9l_- :
1 Y Cs51".o'o"" ! iffl1oru"
l:
I Sss GfoundI Distribution.I pag€ 147.
TY
tt
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Fr,lrs 3i
--Iil;--------l
3m" ) 9ff" s"" po*"r I
\, See Starting system. I "- . Distribution. l- pasezr.zi-t.'or'ztlz. ._____=Fl}_*t0"_____.1
l3.f ftT:4""
Bulbchekoutp$
L----------
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o"n" tot'
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t (R ' rNprcAroR uGHr I
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f $?'#"ot'to'-*'1;;
GBN/FED II PHOIO 22
5fi ennxe rluroI ' I LEVEL SWITCH
| /_,? lfJ",ii"."gl'.-
w::::"
"'-1":::::-.
! 3:"'lll"*l
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L__l+: G40lPHOIO 57
l-rlrl PARKTNGI ' I BRAKE SWITCH ,
lIdft"f[]r'"r'" i
c"n"o":- "igt-ol'- - - - - j
71-1

Brake System Indicator Light (cont'd)
- How the Circuit Works
The brake system indicator light comes on to alert
the driver that the parking brake is applied, or that
the brake fluid level is low. lt also comes on as a
bulb test when the engine is cranked.
Parking Brake
With the ignition switch in ON (ll) or START (lll),
voltage is applied through fuse 25 to the brake
system light. When you apply the parking brake, the
switch closes and provides a ground for the light.
The light then comes on to remind you that the
parking brake is applied.
Brake Fluid Level
With the ignition switch in ON (ll) or START (lll),
voltage is applied through fuse 25 to the brake
system light. lf the brake fluid level is low, the brake
fluid level switch closes, providing ground to the
circuit. The brake system light then comes on,
alerting the d verto a low brake fluid level in the
brake master cylinder. (Check brake pad wear
before you add fluid).
Bulb Check
With the ignition switch in START (lll) and clutch
pedal depressed or A'lT gear selector in PARK (P)
or NEUTRAL (N), voltage is applied through fuse 31
to the brake bulb check circuit. The brake bulb
check circuit closes, allowing current to flow through
the brake system light and bulb check circuit to
ground. The brake system light then comes on to
test the bulb.
Refer to the Service Manual (Section 23, Electrical)
for specific tests or troubleshooting procedures.
71-2
a
\fa

Power Door Locks (cont'd)
Keyless Receiver Unit Input Test
The following tests are pertormed with A (Main) and B (Keyless) disconnected from the audio unit.
TerminalNo.WireColorTest ConditlonTest: Desired RasultPossible Cause it resull is not obtained
4WHT/BLUUnder all conditionsCheck for vollage to ground:
There should bs batteryvoltage.
aBlown No. 47 (7.5A) tuse in the
under-hood fuss/relay box
An open in the wireo
5YEUREDlgnition switch ACC (l)Check lor voltage to ground:
Th€re should be battery
voltage.
aBlown No. 28 (10A) fuse in the
underdash fusg/relay box
An open in the wirea
TerminalNo.WireColorTest CondiiionTest: Desired ResultPossible Cause if rssult i3 not obtalned
BLU/RED
lgnition key insertedinto the ignition key
switch
Check for voltage to ground:
There should bs 1 V or less.aPoor ground (G401, G402)
Faulty ignition key switch
An open in the wire
Short in the wire
a
a
algnition key r€moved
trom the ignition key
switch
Check lor voltage to ground:
There should be 4 V or more.
3BLUI/ELUnder all conditions
Check for continuity betweenthe audio unit 16P connectorNo- 3 terminal and power doorlock control unit 12P connsctorNo. 6 terminal: There should
be continuity.
I An open in the wire
6BLK/YELlgnition switch ON (ll)Check for voltage to ground:
Thers should be batteryvollage.
. Blown No. 14 (7.5A) fuse in the
under-dash fuse/relay box
. An open in the wire
8LT GRN/BLKCeiljng light switch in"middle position"Connect to ground: The ceilinglight should come on.
aBlown No. 43 (7.5A) fuse in the
undsr-hood fuse/relay box
Blown ceiling light bulb
Faulty ceiling light
An open in the wire
a
a
o
14LT GRN/REDEach door oponed,one at a timeCheck for continuity to ground:
There should be continuity.
aFaulty door switch
An open in lhe wirea
tcBLKUnder all conditionsCheck for continuity to ground:
There should b€ continuity.
aPoor ground (G401, G402)
An open in the wirea
16GRYUnder all conditionsConn€ct to ground:
Horn should sound.
. Blown No.52 (15A) fuse in the
under-hood tuse/relay box
. Faulty horn
. Faulty horn relay
. An open in the wire
130-6

Power Door Locks (cont'd)
Keyless Door Lock Control Unit Input Test
The following tests are performed with the keyless door lock control unit connector disconnected.
TerminalNo.WireColorTest ConditionTest: Desir€d ResultPossible Cause if result ls not obtain€d
1LT GRN/BLKCeiling light switch in"middle position"Connect to ground: The ceilinglight should come on.
aBlown No. 43 (7.5A) luse in theunder-hood tuse/relay box
Blown ceiling light bulb
Faulty ceiling light
An open in the wire
o
a
a
3BLU/RED
lgnition key insertedinto the ignition keyswitch
Ch€ck lor voltage to ground:There should be I V or less.aPoor ground (G401, G402)
Faulty ignition key switch
An open in the wire
Short in the wire
a
a
o
lgnition key removedlrom the ignition keyswitch
Check for voltage to ground:There should be 4 V or more.
BLfiEtlgnition switch ON (ll)Check lor voltage to ground:
There should be batteryvoltage.
. Blown No. 14 (7.54) fuse in theunder-dash fuse/relay box
. An open in the wire
bREO/BLKHeadlight switch inPARK OT HEAD
Check for voltage to ground:
There should be batteryvoltage.
aBlown No. 32 (7.5A) luse in theunder-dash fuse/relay box
A faulty headlight switch
An open in the wire
a
o
LT GRN/RED
Each door opened,one at a timeCheck lor continuity to ground:
There should be continuitv.
oFaulty door switch
An open in the wireo
15GRYUnder all conditionsConnect to ground:
Horn should sound.
. Blown No. 52 (154) fuse in theunder-hood fuse/relay box
. Faulty horn
. Faulty horn relay
o An open in the wire
BLKUnder all conditionsCheck lor continuity to ground:
There should be continuity.
aPoor ground (G401 , G402)
An open in the wirea
130-16