AUTOMOTIVE ELECTRICIANS
WIRING-DIAGRAMS

Alfa Romeo 166 2.0 TS fino a 2/99 – HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

    HomeWiring Diagrams alfaAlfa Romeo 166Alfa Romeo 166 EnglishAlfa Romeo 166 2.0 TS fino a 2/99 All WIRING DIAGRAMS (English)
Download PDF file
Get access to all wiring diagrams of the carDownload PDF file
Wiring diagram
HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Wiring diagram Alfa Romeo 166 2.0 TS fino a 2/99Get access to all wiring diagrams of the carDownload PDF file

Components
Component codeNameAssembly reference
A6Rear junction node-
B1Junction unit-
B1Junction unit5505A
B1Junction unit5505A
B2Dashboard junction unit (CPL)-
B2Junction unit-
B2Junction unit5505A
B5MAXI FUSE box-
B16Mirror demist fuse-
B33Heated rear window fuse-
B45Luggage compartment junction unit (CVB)-
B99Battery fuses junction unit (CBA)5530B
C10Front left earth-
C15Facia earth, driver's side-
C20Passenger side dashboard earth-
C21Passenger side dashboard earth-
C25Earth on steering column-
C30Rear left earth-
C32Heated rear window earth-
D6Rear - front coupling-
D19Dashboard / battery coupling-
D20Dashboard-rear coupling-
D26Dashboard-right rear coupling-
D30Driver's front door rear. section.-
D30Front left door connection-
D31Front left door connection-
D31Front right door connection-
D31Passenger front door rear. section.-
D90ICS-dashboard coupling-
E50Instrument panel5560B
H1Ignition switch5520A
H31Adjustable-folding mirrors control7005R
H80Climate control system controls5040D
J55Heated rear window relay-
M40A.B.I control unit5505A
M45Electronic Check device-
M45Electronic Check device5560C
M70Climate control system control unit-
M70Climate control system control unit5040B
P25Aerial amplifier-power supply5580M
P55Heated rear windscreen-
P56Heated windscreen-
P60Left door mirror7005R
P61Right door mirror7005R
Location of components
HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Location of components Alfa Romeo 166 2.0 TS fino a 2/99Get access to all wiring diagrams of the carDownload PDF file

Components
Component codeNameAssembly reference
A6Rear junction node-
B1Junction unit-
B1Junction unit5505A
B1Junction unit5505A
B2Dashboard junction unit (CPL)-
B2Junction unit-
B2Junction unit5505A
B5MAXI FUSE box-
B16Mirror demist fuse-
B33Heated rear window fuse-
B45Luggage compartment junction unit (CVB)-
B99Battery fuses junction unit (CBA)5530B
C10Front left earth-
C15Facia earth, driver's side-
C20Passenger side dashboard earth-
C21Passenger side dashboard earth-
C25Earth on steering column-
C30Rear left earth-
C32Heated rear window earth-
D6Rear - front coupling-
D19Dashboard / battery coupling-
D20Dashboard-rear coupling-
D26Dashboard-right rear coupling-
D30Driver's front door rear. section.-
D30Front left door connection-
D31Front left door connection-
D31Front right door connection-
D31Passenger front door rear. section.-
D90ICS-dashboard coupling-
E50Instrument panel5560B
H1Ignition switch5520A
H31Adjustable-folding mirrors control7005R
H80Climate control system controls5040D
J55Heated rear window relay-
M40A.B.I control unit5505A
M45Electronic Check device-
M45Electronic Check device5560C
M70Climate control system control unit-
M70Climate control system control unit5040B
P25Aerial amplifier-power supply5580M
P55Heated rear windscreen-
P56Heated windscreen-
P60Left door mirror7005R
P61Right door mirror7005R
DescriptionThe rear window heater element, door mirror demister coils and the windscreen heater element absorb a considerable amount of energy. They must therefore be turned off once they have been working for a certain period of time.The system for demisting the rear window and door mirrors and heating the windscreen is controlled by a timer. The procedure is as follows.The system is turned on with:with the key in the ON positionactivation signal from the relevant button, located on the climate control system control panel.Coils are activated for 60 minutes, then the power supply is cut off.The power supply is also cut off under the following conditions:ignition in OFF position;deactivation signal from the relevant button;after the first 10 seconds of operation, if engine speed drops below 1000 rpm. .The led stays on as long as the back window heater element is activated.The control software is managed by the Check device located beside the junction unit (the climate control system panel houses only the control button and led, but does not affect the activation software in any way).The back window/door mirror demister and windscreen heater circuit is protected by a special fuse and controlled by a specific relay. These are located on the fuse and relay bracket on the right hand side of the luggage compartment.The door mirror and windowscreen coils are protected by another fuse located on the right hand side of the luggage compartment next to the fuse and relay described previously.
Functional description The heated rear window relay J55 controls the simultaneous switching on of the demisting function of the rear window P55 , the heated windscreen P56 and the external rearview mirrors P60 and P61 . (The control circuit of the heated rear window P55 passes through the power source/amplifier aerial P25 - 3309640SeeE3510RADIO ) The supply line to the latter is also protected by the mirror demister fuse B16 . The relay J55 is supplied by the direct line from the battery through the fuse B33 . An earth signal from the electronic Check device M45 - pin 10 of connector C - energizes the coil of relay J55 , so supply is sent to the resistors of P55 , P56 , P60 and P61 : this signal is enabled and suitably time-lagged by the device M45 . An ignition-operated power supply (INT/A) for the Check device M45 reaches pin 9 of connector C through fuse F1 of junction unit B1 : pin 7 of connector C is earthed. The device M45 gives enablement to the time-lagged switching on of the rear window when it receives the command from the on/off button - pin 11 of connector A - and at the same time the engine rpm signal is present - pin 8 of connector B, coming from the instrument panel E50 . The enablement takes place when the engine speed is above 1000 rpm. The button which switches on the heated rear window function is in the climate control panel H80 : the command is sent to the climate control unit M70 - pin 13 of connector C - from pin 9 through the serial line. The control unit M70 is supplied - to pin 11 of connector B - from the ignition-controlled line (INT/A) of relay R1 protected by fuse F9 of junction unit B1 : pin 8 of connector C is earthed. From pin 9 of connector B of M70 , the command is sent to the Check device M45 - pin 11 of connector A. With the function switched on, the Check device M45 sends back a signal - from pin 2 of connector B - to illuminate the led which indicates that the function is on; the signal reaches pin 11 of connector C of M70 and from there the controls H80 .

Rear junction node



A6A



A6B



A6C



A6G



A6H



A6I



A6A



A6B



A6C



A6G



A6H



A6I



Junction unit



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1D



B1D



B1D



B1G



B1E



B1E



B1E



B1E



B1E



B1E



B1E



B1E



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1H



B1H



B1H



B1H



B1H



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1X



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1A



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1B



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1C



B1D



B1D



B1D



B1G



B1E



B1E



B1E



B1E



B1E



B1E



B1E



B1E



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1F



B1H



B1H



B1H



B1H



B1H



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1I



B1X



multi-function components



5505A10


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314824-5505A18multi-function controlunit - r r . 1. Undo the bolt (1a) and push back the junction unit as far asnecessary to disconnect the electrical connections (1b).767For precise identification ofthe electrical connections, see Wiring Diagrams Section.2. Remove the junction unit.2010592

5505A13


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). 3315196-7040D12engine front side cover (one) lh or rh - r r (left). 3315197-7040D14engine bay rear side cover (one) lh or rh - r r (left).

5505A18


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). 1. Unscrew bolt (1a) and open fuse access cover (1b).2. Undo the bolt (2a) and remove the integrated multiservices unit(2b) after having disconnected the electrical connections (2c),(2d), (2e), (2f) and (2g).2010595

5505A29


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Open the bonnet lid.1. Release the retainers (1a) and remove the cover (1b) for theadditional junction unit.2071293

Dashboard junction unit (CPL)



B2



B2A



B2B



B2C



B2E



B2F



B2G



B2G



B2H



B2I



B2I



B2I



B2I



B2I



B2I



B2



B2A



B2B



B2C



B2E



B2F



B2G



B2G



B2H



B2I



B2I



B2I



B2I



B2I



B2I



MAXI FUSE box



B5A



B5C



B5D



B5D



B5A



B5C



B5D



B5D



Mirror demist fuse



B16



B16



Heated rear window fuse



B33



B33



Luggage compartment junction unit (CVB)



B45A



B45B



B45A



B45B



Battery fuses junction unit (CBA)



B99A



B99C



B99D



B99E



B99G



B99A



B99C



B99D



B99E



B99G



battery and leads



5530B10


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314864-5530B54battery cover - r+r . Make sure that the ignition key is in theOFF position.1. Disconnect the battery negative and positive terminals.2. Undo the bolt (2a) fixing the battery retaining bracket (2b).3. Remove the battery.2010647

5530B40


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314864-5530B54battery cover - r+r1. Press and release the retainers (1a), then remove the cover (1b)for the supply box on the battery. 2071303

5530B52


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314864-5530B54battery cover - r+r . 3314861-5530B10battery - r+r . 1. Remove the battery fluid collection reservoir.2010648

5530B54


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting211. Working in the luggage compartment, undo the knob for the batterycover.2. Remove the battery cover.2010650

Front left earth



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10B



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10A



C10B



Passenger side dashboard earth



C20



C20



C20



C20



C20



C20



C20



C20



Dashboard earth on Air Bag bracket



C21



C21



C21



C21



C21



C21



C21



C21



Earth on steering column



C25A



C25A



C25A



C25B



C25B



C25B



C25



C25A



C25A



C25A



C25B



C25B



C25B



C25



Rear left earth



C30



C30



C30



C30



C30



C30



C30



C30



C30



C30



C30



C30



Heated rear window earth



C32



C32



C32



C32



Rear - front coupling



D6C



D6C



D6C



D6C



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6B



D6B



D6C



D6C



D6C



D6C



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6



D6B



D6B



Dashboard / battery coupling



D19



D19



D19



D19



Dashboard-rear coupling



D20A



D20A



D20A



D20A



D20B



D20B



D20C



D20C



D20A



D20A



D20A



D20A



D20B



D20B



D20C



D20C



Dashboard-right rear coupling



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26B



D26B



D26B



D26B



D26B



D26B



D26B



D26B



D26B



D26B



D26B



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26A



D26B



D26B



D26B



D26B



D26B



D26B



D26B



D26B



D26B



D26B



D26B



Driver's front door rear. section.



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



D30



Front left door connection



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



D31



ICS-dashboard coupling



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



D90



Instrument panel



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50B



E50B



E50B



E50B



E50B



E50B



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50D



E50D



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50A



E50B



E50B



E50B



E50B



E50B



E50B



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50C



E50D



E50D



analogue control panel



5560B06


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314917-5560B11analogue control panel- r+r or replace . 1. At the bench, remove the bulbs from the panel using suitablepliers.2010702

5560B11


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). Lower the steering wheel and move it back.1. Undo the bolts (1a) and remove the upper half casing for thesteering column (1b).2010703

5560B12


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). Open the fuse carrier compartment flap.1. Using the tool (1a) and pushing the fuse carrier compartment,remove the surround (1b) complete with switches.2. Disconnect the elelectrical connections (2a), (2b) and (2c) andremove the surround complete with switches.2010706

Ignition switch



H1A



H1A



H1A



H1A



H1A



H1A



H1B



H1B



H1B



H1A



H1A



H1A



H1A



H1A



H1A



H1B



H1B



H1B



ignition switch



5520A12


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). 3314931-5580C18air bag module - r+r . 7693315174-7040A26steering column trim - r+r . 3314624-4110A11steering wheel - r+r for replacement or check forversions with air bag . 3314902-5550A12complete stalk unit - r+r for versions with air bag . 1. Release the aerial for the electronic key from the ignition switch.2. Release the electrical wiring from the fixing band and disconnectthe electrical connection for the ignition switch.2010621

5520A14


768

Adjustable-folding mirrors control



H31



H31



H31



H31



front door mirrors



7005R30


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213315012-7005E12corner cover of onefront side door, lh or rh r rWith the ignition key in the OFF position,disconnect the battery negative terminal.Take out the connector carrier and openit.1. Disconnect electric mirror wiring connectors (1a), (1b) and(1c). 2. Remove bolt cover panel (2a) and uncrew the bolts (2b) securingthe mirror to the door.3. Withdraw the wiring and remove the mirror.2010797

7005R32



7005R35


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21With the ignition key in thestop position, disconnect the battery negative terminal.1. Use tool (1a) to prise out reflector (1b).1. Disconnect the electrical connections from the reflector andthen remove.2010798

7005R36


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213315037-7005R35door mirror reflector- r r1. Unscrew the motor retaining bolt.2. Disconnect the electrical connections shown.3. Remove the positioning motor.2010799

7005R37


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213315037-7005R35door mirror reflector- r r3315038-7005R36door mirror motor - r r1. Unscrew the bolts retaining the cover to the mount.2. Unscrew the bolts retaining the motor mount to the cover.3. Cut the electrical wiring retaining strip and prise the outdoortemperature sensor out of the cover.4. Remove the rear view mirror cover.2010800

7005R40


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21With the ignition key in thestop position, disconnect the battery negative terminal.1. Take the control switch unit out of the handle by undoing theretaining clip.2. Disconnect the electrical connectors.3. Remove the control switch unit.2010801

7005R42



Climate control system controls



H80



H80



H80



H80



H80



H80



H80



H80



air conditioner controls



5040D52


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). 3314810-5050B34windscreen wiper arm/s complete with blade - r+r . 3315282-7055A18Windscreen base TRIM - R.R. . 1. Disconnect the electrical connection for the intake/recirculationair flap actuator.2. Undo the bolts (2a) and loosen the bolt (2b) for the recirculation/intakeair flap actuator using the tools (2c) and (2d).3. Disconnect the linkage (3a), rotate the recirculation/intakeair flap actuator (3b), completely undo the remaining bolt and removeit.2010575

5040D70


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314729-5010B52ducts (one), lh or rh,on air distribution unit for air duct beneath facia r r with faciaremoved . 1. Disconnect the electrical connection for the distribution airflap actuator.2. Undo the fixing bolts and move the distribution air flap actuatoraside.3. Undo the bolts (3a) and remove the actuator mounting bracket(3b).4. Release the wiring and remove the distribution air flap actuator.2010576

5040D76



5040D77


768

Heated rear window relay



J55



J55



A.B.I control unit



M40A



M40A



M40B



M40B



M40C



M40A



M40A



M40B



M40B



M40C



Electronic Check device



M45A



M45A



M45A



M45A



M45B



M45B



M45B



M45B



M45C



M45C



M45C



M45C



M45C



M45C



M45C



M45D



M45D



M45D



M45D



M45D



M45D



M45D



M45E



M45E



M45E



M45E



M45A



M45A



M45A



M45A



M45B



M45B



M45B



M45B



M45C



M45C



M45C



M45C



M45C



M45C



M45C



M45D



M45D



M45D



M45D



M45D



M45D



M45D



M45E



M45E



M45E



M45E



Climate control system control unit



M70A



M70A



M70A



M70A



M70A



M70B



M70B



M70B



M70B



M70C



M70C



M70C



M70C



M70A



M70A



M70A



M70A



M70A



M70B



M70B



M70B



M70B



M70C



M70C



M70C



M70C



system safety check devices



5040B14


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). 3314767-5040A10Air conditioning refrigerant CIRCUIT - Draining andRefilling . 1. Disconnect the electrical connection for the air conditioningsystem multi-stage pressure switch.2. Undo and remove the air conditioning system multi-stage pressureswitch.2010547

5040B30


768

Aerial amplifier-power supply



P25A



P25B



P25C



P25A



P25B



P25C



om-board navigator



5580M32


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting213314953-5580M50mount for on-board navigatorcomponent in boot - r r . 1. At the bench, unto the screws (1a) and remove the CD player/changer(1b).2010737

5580M50


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21Undo the wing bolts and removethe boot left side trim. Make sure that the ignition is off (STOPposition), then disconnect the negative battery terminal (referto op. 33148615530B10battery - r+r ). Disconnect the electrical connections forthe loudspeakers' amplifier.1. Undo the nuts and move aside the on-board navigator componentsmounting as far as necessary.Disconnect the electrical connection fromthe navigation system CD player/changer.Disconnect the electrical connections ofthe audio CD player/changer.2. Remove the complete on-board navigator components mounting.2010738

5580M70


<anchor>0</anchor><span>Removing</span><icon><imageid>20</imageid></icon>1Refitting21 Make sure that the ignitionis off (STOP position), then disconnect the negative battery terminal(refer to op. 33148615530B10battery - r+r ). 3314968-7005A20Front side DOOR - R.R. . 3315319-7065C34l/h or r/h sun blind (one) - r+r . 3315205-7040E40modular front courtesy light - r r . 3315204-7040E28courtesy light on sun blind - r r . 3315214-7040H32sliding roof switch door panel - r r . 3315318-7065C30interior l/h or r/h grab handle (one) - r+r . 3315216-7040H36central trim lower element - r r . 3315217-7040H38central pillar upper element - r r . 3315215-7040H34central pillar trim - r r . 3315200-7040E17lh or rh rear courtesy light - r r . 3315323-7065C68rear view mirror - r+r . 3315322-7065C59interior rear view mirror with automatic antiglaredevice - r r . 3315211-7040H10roof panel lining - r r . 3315271-7050A20one-piece rear seat cushion - r r . 3315270-7050A19rear seat squab - r r . - 7050A42 rear squab catch device (one) - r+r (left). 1. Disconnect the connections of the on-board navigator aerial cables.2010739

Heated rear windscreen



P55A



P55A



P55B



P55B



P55A



P55A



P55B



P55B



Heated windscreen



P56



P56



P56



P56



P56



P56



Left door mirror



P60A



P60A



P60B



P60C



P60D



P60D



P60A



P60A



P60B



P60C



P60D



P60D



Right door mirror



P61A



P61B



P61D



P61A



P61B



P61D


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