1996 HONDA CIVIC thermo

Fans (cont'd)
- '99-'00 Models
Switch"common
a,/cTHERMOSTATOff below3'C (37" F).
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63-2
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- How the Circuit Works
Radiator Fan
Voltage is provided at all times to the radiator fan
relay (contacts) through fuse 57. With the ignition
swilch in ON (ll), voltage is provided to the coil of
the relay through luse 17.
The radiator tan relay can be grounded through
either the engine coolant temperature switch or the
engine control module (ECM) or powertrain control
module (PCM).
The engine coolant temperature switch grounds
the radiator fan relay (coil) when the engine
coolant temperature exceeds 199'F (83'C). The
switch opens when coolanl temperature
decreases 3'- 8'C.
Condenser Fan
Voltage is provided at all times to the condenser fan
relay (contacts) through fuse 56. With the ignition
switch in ON (ll), voltage is provided to the coil of
the relay through fuse 17. When you push the A'lC
switch and put the heater fan switch in 1, 2,3, o( 4
position, the ly'C thermostat comes on, the
condenser fan relay energizes, and the condenser
fan motor runs.
A,/C Thermostat
The A,/C thermostat is located on the evaporator
housing. The A,/C thermostat tums off the A/C
compressor clutch if the temperature at the
evaporator goes below 3'C (37'F). This prevents
condensation from freezing on the evaporator fins
and blocking the air delivery into the passenger
compartment. lf the temperature goes below 3'C
(37"F) tuming off the Ay'C thermostat, ground will be
removed from the condenser fan relay. This will
deenergize the relay and remove voltage from the
condenser fan motor causing the fan to stop running.
Reter to the Service Manual (Section 23, Eleckical)
for specific tests or troubleshooting procedures.
63-3

-43. Cruise Control Unit
- Gray ('96-'97 models) or Blue ('98-'00 models)- Behind lett side ol dash- On main wire harness
'96-'97 Models:
1 BRN (Cruise controlactuator control)
2 GBY(Brake switch input)
3 BLK (Ground)
4 GRN,ryVHT(Brake switch Input)
5 LT GRN/RED(Set/decel signal inPUt)
6 LT GRN/BLK(Resume/accel inPut)
7
'98-'00 Models:
'I BBN (Actuator control)
2 GRY(Brake switch input)
3 BLK (G401)
4
5 GRN,^/VHT(8rake switch rnput)
6 LT GRN/RED(Set/decel signal inPut)
7 LT GRN/BLK(Resume/accelsignalinput)
8 BRN,AiVHT(Vent solenoid control)
9 RED/BLU("Cruise Control"indicator light conkol)
10 BRN/BLK (Vacuum
solenoid controi)
12 BLUMHT(Vehicle speed input)
13 LT GRN (Power input)
14 PNK (Dlsengage input)
8 *1: BLU/GRN(Cruise signal)
9 BFN/WHT
{Actuator control)
1O RED/ALU(lndicator light conkol)
11 BRN/BLK(Actuator control)
12 BLU,ryVHT(Vehicle speed input)
13 LT GRN (Power input)
14 PNK (Dlsengage input)
\
17
II1011'121314
*1= 99-'00 w(h A/T
202-13
44. Heater Control Panel ('96-'98)
- Green- Center ol dash- On heater-sub-B wire harness
1 YEL (H/DEF control)
2 BLKTYEL (lgnition input)
3 WHT/BLU(Battery input)
4 YEUBLU(Defrost control)
5 RED (lllumination -)
6 RED/BLK (lllumination +)
7 ELUruVHT (Heat conkol)
8 YEL/RED (Vent control)
9 GRN/YEL(Bl'LEV control)
10 BLK (Ground)
11 BLU/FED(lVC thermostat input)
12 GRNMHT(Fresh control)13 GRN/FED(Recirc. control)
14 GRN (A/C ON input)
45. c440
- Blue- Below right side of dash- Connects main wire harness to heater-sub-A
wrre narness
2 BLK (G402)
3 BLU/WHT(Blower controls)
4 '99-'00: BLU/YEL(Rear window defoggeo
7
9
10
11 WHT/BLU (Fuse 47)
12 BLK (G402)
13 RED (Dash andconsole Iights)
14 RED/BLK (Dash andconsole lights)
15 BLUAVHT (FVC
compressor conkols)
16 BLK/YEL (Air delivery)

Connectol
or
Terminal
Number of
Cavities/
Color
LocationConnects toNotes
Connector ldentification and Wire Harness Routing
HEATER SUB.HARNESS A
1"t-
Heater Sub-harness A: '96-'98 models
c440
c722
c723
c724
c725
c726
c727
1 6-BLU
7.GRN
2O.GRY
3-GRY
2.NAT
4-BRN
4.GRN
Under middle of dash
Behind middle ot dash
Behind front console
Behind glove box
Below right side of dash
Behind glove box
Behind glove box
Main wire harness
Mode control motor
Heater sub-harness B
A,/C thermostat
Blower motor
Blower motor resistor
Recirculation control motor
Heater Sub-harness Bt '96;98 models
c743
2O-GRY
6-BRN
14-GRN
Behind front console
Behind middle of dash
Behind middle of dash
Heater sub-harness A
Heater fan switch
Heater control panel
u.
HEATER SUB.HARNESS B
l\-
203-44

) ._'
Connectol
o1
Terminal
Number ot
Cavltles/
Color
LocationConnects toNotes
Heater Sub-harness A: '99-'00 models
c440
c722
c723
c724
wlzc
c726
c727
c728
c729
c730
16.8LU
7-GRN
24-BLU
3-GRY
2-NAT
3-NAT
4.GRN
1-BRN
5-GRN
4-BRN
Under middle of dash
Behind middle of dash
Behind front console
Behind glove box
Below right side of dash
Behind glove box
Behind glove box
Behind front console
Behind glove box
Behind glove box
Main wire harness
Mode control motor
Heater sub-harness B
A'lC thermostat
Blower motor
Power transistor
Recirculation control motor
Heater sub-harness B
Air mix control motor
Blower motor high relay
Heater Sub-harness B: '99-'00 models
c723
c728
c742
c743
24.BLU
1-BRN
8-GRY
2O.BLK
Behind front console
Behind front console
Behind middle of dash
Behind middle of dash
Heater sub-harness A
Heater sub-harness A
Heater control panel conn€ctor A
Heater control oanel connector B
HEATER SUB.HARNESS A
HEATER SUB-HARNESS B
203-45