1999 FIAT PUNTO ECU

Body electrical systems 12*5
4.27 Withdraw the tight unH, then twist the bulbholder anti-clockwise to release it from the light unit
Front fogllght 30 Access to the rear of the fogllght units can be gained by via removable hatches in plastic inner wheel arch liners. 31 Turn the steering wheel to angle the roadwheel away from the rear of the relevant fogllght. 32 Reach through the wheel arch liner and disconnect the wiring from the rear of the fogllght unit at the connector (see illustration). 33 Unscrew the rear cover from the foghghl unit by turning it anticlockwise (see Illustration). 34 Unplug the flying lead from the push-fit connector inside of the rear cover. Release Ihe spring clip, and withdraw the bulb from the rear of the light unit (see illustrations). 35 Fit the new bulb using a reversal of Ihe removal procedure, ensuring that the recess In the bulb flange engages with the lug in the bulbholder.
Rear light cluster bulbs 38 Open the tailgate. Working from within the loadspace. prise the plastic caps from the rear pillar trim panel (see illustration). 37 Using the special socket provided with the vehicle's toolkit, unscrew the rear light cluster securing bolts (see illustrations). 38 Pull the light cluster away from the bodywork. Unplug the electrical wiring at the connector (see illustrations).
4.37b ... unscrew the rear light cluster securing bolts (arrowed)
4.32 Disconnect the wiring from the rear 4.33 Unscrew the rear cover from the of the fogtight unit at the connector fogllght unit by turning It anticlockwise
4.38a Pull the light cluster away from the 4.38b ... unplug the electrical wiring at bodywork... the connector

12*6 Body electrical systems
4.39a Remove the screws...
39 Remove the screws and separate the bulbholder from the lens unit (see Illustrations). 40 The bulbs are a bayonet (it in the bulbholder (s&e Illustration), 41 Fit the new bulb using a rovorsal of the removal procedure. Note that the stop/tall light bulb has offset locking pins, to ensure correct orientation.
Rear number plate light 42 Remove the securing screws, and lower the light unit lens from the tailgate handle (see Illustration), 43 The bulb Is a push fit In the light unit. 44 Fit the new bulb using a reversal of the removal procedure.
5.3a On models with a manually oporated sunroof, remove the sunroof crank handle
5.3b Carefully prise out the pfestic caps...
from the lens unit
5 Bulbs (interior lights) -renewal
General 1 Whenever a bulb is renewed, note Ihe following points: a) Ensure that the relevant electrical circuit is Isolated before removing a bulb. If
In
doubt, disconnect the battery negative terminal (refer to Disconnecting the battery In the Reference Section of this manual) before starting work. b) Remember that, if the light has just been in use, the bulb may be extremely hot. c) Always check the bulb contacts and holder, ensuring that there is clean metal-to-metal contact between the bulb and its live contacts) and earth, dean off any corrosion or dirt before fitting a new bulb. d) Wherever bayonet-type bulbs are fitted, ensure that the live contact(s) bear (irmly against the bulb contact. e) Always ensure that the new bulb is of the correct rating (see Specifications), and that it Is completely clean before fitting it.
Courtesy light 2 On Punto S models (except those with a manually operated sunroof end/or theft alarm) access to the courtesy light bulb can gained by unclipping the lens from the roof lining. The bulb can then be prised from its spring loaded contacts.
5.3c ... and remove the screws that secure the overhead console to the roof
buibhoidai
/ ' fl B 4.42 Remove the securing screws, and lower the light unit lens from the tailgate handle 3 On all other variants, carefully prise out the plastic caps and remove the screws that secure the overhead console lo the roof. Note: On models fitted with a manually operator sunroof, it will be necessary to remove
the
screw and detach the sunroof crank
handle
from its shaft, before the overhead console can be removed (see illustrations). A Unplug Ihe wiring from the console at the connector (see illustration). 5 Unciip the plastic cover from the rear ol the overhead console (see illustration). 6 Carefully prise the bulb from the spring contacts (see Illustration). 7 Fit the new bulb using a reversal of the removal procedure.
Luggage compartment light 8 The light unit is located under 1he left hand parcel shelf support panel.
5.4 Unplug Ihe wiring from (he console at the connector

Body electrical systems 12*7
5,5 Unclip the plastic cover from the rear of the overhead console 0 Unclip the lens from the support panel (see Illustration). 10 The bulb can be prised from its spring-loaded contacts (see illustration). 11 Fit the new bulb using a reversal of the removal procedure.
Instrument panel gauge Illumination 12 Remove the instrument panel as described In Section 7. 13 The bulbs are a bayonet fit in the rear of the instrument panel (see Illustration). The colour of the bulb casing denotes its wattage - ensure that a replacement bulb of the correct rating is used.
Switch illumination 14 The bulbs that Illuminate the facia-mounted switches are integral with the switch body and cannot be renewed separately.
5.6 Overhead console bulb location 5.9 Unclip the Ions from the support panel A Map reading bulb B Courtesy bulb C Clock illumination bulb
6.3a Unscrew the headlight side securing bolt (arrowed)...
5.10 The bulb can be prised from its spring-loaded contacts (arrowed)
6 Exterior light units • removal and refitting ^ ^
Caution: Ensure that the relevant electrical circuit is isolated be/ore removing a light unit. If In doubt, disconnect the battery negative terminal (refer to Disconnecting the battery in the Reference Section of this manual).
1 Remove the adjacent direction indicator light unit as descnbed in Section 4. 2 Disconnect all wiring from the rear of the light unit at the connectors.
5.13 Tho bulbs are a bayonet fit in the rear of the instrument panel
3 Unscrew the headlight side and upper securing bolts (see illustrations). 4 Withdraw the headlight unit from the vehicle (see illustration).
Refitting 5 Refitting is a reversal of removal. On completion, it Is advisable to hove the headlight beam alignment checked with reference to Section B.
Front direction indicator light 6 The procedure is described as part of the bulb renewal procedure In Section 4. Note that the wiring harness can be disconnected from the light unit without removing the bulb holder (seo illustration).
6.3b ... and upper securing bolts (arrowed) 6.4 Withdraw the headlight unit from the vehicle 6.6 Disconnecting the direction indicator light unit wiring from the bulb holder

12*8 Body electrical systems
6.10 Front foglamp beam adjustment screw (arrowed)
Front direction indicator side repeater light 7 The procedure is described as pari of the bulb renewal procedure In Section 4.
Front foglight 8 Remove the hatch from the wheel arch liner and unplug Ihe wiring Irom the rear of the foglamp unit. 9 The front foglamps are secured to tho valence by three screws • one directly above the light unit, accessed from the front and two accessed Irom below the valence. Once these ere removed, the foglamp can be removed via the hatch in the wheel arch liner. 10 Refitting is a reversal of removal. On complellon, it Is advisable to check the foglight beam alignment. If necessary, the beam may be altered using the adjustment screw (see Illustration)
Rear light cluster 11 The procedure is described as part of the bulb renewal procedure in Section 4.
7 Instrument panel -removal and refitting
Removal 1 Disconnect the battery negative terminal (refer to Disconnecting the battery in the Reference Section of this manual). 2 Remove the securing screws from 1he instrument panel surround.
9.2 Unplug the wiring from the hom at tho connector (arrowed)
7.3a Carefully pull the panel oway from the facia 3 Carefully pull tho panel away from (he facia. Label each bundle of electrical cables carefully to old refitting later end then unplug them nt the connectors (see illustrations). Where a mechanical speedometer drive is fitted, disconnect the dnve coble from the rear of the instrument panel, 4 The individual gauges are Illuminated by filament bulbs. These are a bayonet fit In the rear of the Instrument panel and can be removed individually by rotating them through a quarter turn and withdrawing them • refer to Section 5 for details.
Refitting 5 Refit the instrument panel by following the removal procedure in reverse
8 Headlight beam alignment -general information
Accurate adjustment ot the headlight beam is only possible using optical beam-setting equipment, and this work should therefore be carried out by a Fiat dealer or suitably-equipped workshop. Incorrectly adjusted headlamps can dazzle other drivers and cause accidents. Certain models are equipped with a headlight aim adjustment switch, located on the facia, which allows the aim of tho headlights lo be adjusted to compensate lor tho varying loads carried in the vehicle. The switch should be positioned according to Ihe
9.3 Unscrew the securing bolt (arrowed) and remove the horn sounder
7.3b Label and then unplug the wiring connectors load being carried in the vehicle - refer to lie vehicle's handbook for details.
9 Horn -removal and refitting
Removal 1 The horn is mounted on the lower edge o! the front left hand wing, behind Ihe front bumper moulding. To gain access, remove the screws and detach the hatch from the wheel arch linor. 2 Reach through the aperture in the wheel arch liner and unplug the wiring Irom the hom st the connector (see Illustration). 3 Unscrew the securing boll (see Illustration) and remove the horn sounder.
Refitting 4 Refit the hom by following the removal procedure in reverse.
10 Loudspeakers -removal and refitting §;
1 Ensure that the radio/cassette unit is switched off.
Facia mounted front speakers 2 Remove the screw and lift off the
facia
grfle (see illustration).
10.2 Remove tho screw and lift off the facia grille

Body electrical systems 12*9
3 Undo the mounting screws and lift out the speaker (see Illustration). Unplug the wiring at the connector. 4 Refitting is a reversal of removal,
Rear parcel shelf speakers 5 Working underneath the relevant parcel shetf support bracket, remove the securing screws and lower the loudspeaker from the support bracket. Unplug the wiring at the connector (see illustration). 6 Refitting is a reversal of removal.
11 Radio aerial - J^s removal and refitting ^
Removal 1 Carefully prise off the plastic cap. then remove the securing screws and withdraw the aerial from the roof. 2 Oraw the aerial co-axial cable through the roof aperture and disconnect it. If there is insufficient slack In the aerial cable, remove the courtesy light unit/overhead panel from the inside of the vehicle (as described earlier in this Chapter) to gain access to the cable connector,
Refitting 3 Refitting Is a reversal of removal, but ensure that seal between the aerial housing and the roof panel is in good condition.
12.2 Removing the radio/cassette unit using the special extraction tools
12.3 Disoonnect the wiring plugs from the rear of the unit. Note the bayonet fuse (arrowed) which is a push fit In the rear of the unit
10.3 Lift out the speaker and unplug the wiring at the connector
12 Radio/cassette player -removal and refitting ^
Removal Note: Once the battery has been disconnected, the radio/cassette unit cannot be re-activated until the appropriate security code has been entered. Do not remove the unit unless the appropriate code Is known. 1 Disconnect the battery negative terminal (refer to Disconnecting the battery in the Reference Section of this manual). 2 Insert the special extraction tools supplied with the vehicle into the holes on either side of the radio/cassette unit. Press them home until the Internal clips can be felt to release (see illustration). 3 Pull the unit forwards from the facia, then disconnect the wiring plugs and the aerial lead from the rear of the unit. Note the bayonet fuse, which is a push fit in the rear of the unit, (see illustration).
Refitting A Refitting is a reversal of removal, ensuring that the wiring Is routed freely behind the unit.
13 Speedometer drive cable - % removal and refitting Ss ^
Note: Later vehicles are fitted with an electronic transducer in place of the mechanical speedometer drive. This is mounted on the fransm/ss/on casing; refer to Chapter 7A, Section 3, for details.
Removal 1 Remove the instrument panel as described in Section 7. 2 Working in the engine compartment, unscrew the sleeve securing the cable end to gearbox, then pull the cable from gearbox. 3 Where applicable, release the cable from the brackets in the engine compartment bulkhead, then pull the cable through into the engine compartment. If necessary, pull the cable grommet from the bulkhead.
10.S Lower the loudspeaker from the support brackot and unplug tho wiring at the connector
Refitting 4 Refitting is a reversal of removal, bearing in mind the following points: a} Ensure that the bulkhead grommet is securely seated. b) Refit the instrument panel with reference to Section 7. c) Note that certain models have alignment marks on the cable outer for use when refitting. The marks should be aligned with the bulkhead bracket when the cable is correctly refitted and routed.
14 Switches -removal and refitting ^
Steering column stalk switches Note: On vehicles equipped with sfeezing wheel-mounted radio controls, the column stalk switch unit also incorporates the rotary contacts for the steering wheel switches. Removal 1 Disconnect the battery negative cable and position it away from the terminal. Turn the steering wheel so that the roadwheeis are pointing in the straight-ahead position. 2 Refer to Chapter 10 and remove the steering wheel from the column. 3 Remove the screws and lift off the upper and lower steering column shrouds. 4 Using an Allen key. slacken Ihe clamp ring at the rear of the switch unit (see illustration),
14.4 Using an Allen key, slacken the clamp ring at the rear of the switch unit

12*10 Body electrical systems
14.5 Remove the switch unit the steering column and unplug the wiring connectors 14.9 Carefully lever the switch body out of the facia, using a flat btaded instrument
14.10 Unplug the wiring from tho rear of the switch body at the connector
5 Pull the switch unit along ihe steering column slightly, then label and unplug the wiring connectors from the rear of the unit (sec Illustration). 6 Remove the switch unit from the steering column Refitting 7 Refitting is reversal of removal • ensure that the steering column/roadwheels are still in the straight-ahead position. On completion, ensure that the direction indicator cancelling mechanism lunations correctly.
Headlamp beam adjustment switch 8 Disconnect the battery negative cable and position il away from the terminal. 9 Carefully lever the switch body out of the facia, using a flat bladed instrument. Pad the
15 Refitting is a reversal of removal. Courtesy light/door ajar warning switches 16 Disconnect the battery negative terminal (refer to Disconnecting the battery in thf Reference Section of this manual). 17 Open the door to expose the switch
in
the door 8-plHar. 18 Remove the secunng screw, then remove the rubber gaiter (where applicable) ant) withdraw the switch from the door pillar. Disconnect the wiring connector as tl becomes accessible.
Tape the wiring to the
door
i m | pillar, or tie a length of
string
HlNTi to the wiring, to retrieve itttit falls back Into the door pillar.
14.14 Remove the screws and lift the switch bank from the rear of the facia panel
facia with a small piece of card to prevent the Instrument blade from damaging it (see illustration). 10 Unplug the wiring Irom Ihe rear of the switch body at Ihe connector (see illustration). 11 Refitting is a reversal of removal
Stop-light switch 12 Refer to the information in Chapter 9
Centre console switches 13 With reference to Chapter 11, Section 19, remove the combined air ventilation/switch panel from the facia. 14 Remove the screws and lift Ihe switch bank from Ihe rear of the panel (see illustration),
19 Refitting Is a reversal of removal, but ensure that the rubber gaiter is securely seated over the switch.
Electric window switches 20 Refer to the information given
In
Chapter It, Section 14.
15 Tailgate wiper motor - & removal and refitting ^
Removal 1 Disconnect the battery negative terminal (refer to Disconnecting the battery in the Reference Section of this manual), 2 Remove the tailgate inner trim panel with reference to Chapter 11, Section 8. 3 Remove the wiper arm with reference to Section 18. 4 Working inside the tailgate, unplug tlx tailgate wiper motor wiring at Ihe connector and disconnect the washer hose at
1he
union (see illustrations). 6 Unscrew the bolts securing the motor mounting bracket to the tailgate (see illustration). 6 Withdraw the motor assembly through tte aperture in the tailgate (see illustration).
15.4a Working inside the tellgate, unplug tho tailgate wiper motor wiring at the connector...
. and disconnect tho washer hose at the union 15.5 Unscrew the bolts securing the motor mounting bracket to the tailgate

Body electrical systems 12*11
15.6 Withdraw the motor assembly through the aperture in the tailgate
Refitting 7 Refitting is a reversal of removal. Refit the wiper arm with reference to Section 16.
16 Windscreen/tailgate washer % system components • ^ removal and refitting ^
Washer fluid reservoir
Removal 1 Ensure that the vehicle is parked on a level surface. Apply the handbrake and chock the rear wheels. Slacken the left hand front roadwheel bolts. 2 Raise the front of the vehicle, rest it securely on axle stands (see Jacking and vehicle support) and remove the left hand front roadwheel. 3 Disconnect the battery negative terminal {refer to Disconnecting the battery In the Reference Section of this manual). 4 Working from the engine bay, remove washer fluid reservoir upper securing screws. 5 Remove the secunng screws and lift off the front and rear sections of the wheel arch liner. 6 Remove fluid reservoir lower securing screws. 7 Disconnect the sviring plugs from the washer pumps, and from the fluid level sensor, where applicable. Label each connector to aid correct refitting later. 8 Disconnect the fluid hoses from the washer tx/mps • if the reservoir still contains fluid, be prepared tor spillage.
16.20a Remove the circllp...
9 Where applicable, release the wiring harness from its clips, and move the harness to one side to allow sufficient clearance to remove the reservoir. 10 Lower the reservoir from under the wheel arch. Refitting 11 Refitting is a reversal of removal.
Washer fluid reservoir and washer pump(s)
Removal 12 Remove the washer fluid reservoir, as described in the previous sub-Section. 13 Disconnect the wiring plug and the fluid hose from the relevant washer pump. 14 Release the spring clip, then pull the washer pump from the reservoir. Where applicable, recover the grommet. Refitting 15 Refitting is a reversal of removal.
IV/nctecreen washer nozzle
Removal 16 Open the bonnet. 17 Working under the bonnet, release the securing tabs using a suitable screwdriver, then push the nozzle from the bonnet. Disconnect the fluid hose, and withdraw the nozzle. Refitting 18 Refitting is a reversal of removal.
housing from the end of the wiper shaft
Tailgate washer nozzle
Removal 19 The tailgate washer nozzle is integral with the wiper motor shaft; remove the wiper motor as described in Section 15. 20 Remove the circllp and then slide the nozzle housing from the end of the wiper shaft (see illustrations). Refitting 21 Refitting is a reversal of removal, but ensure that the fluid hose is securely reconnected.
17 Windscreen wiper motor -removal and refitting ^
Removal 1 Disconnect the battery negative terminal (refer to Disconnecting the battery In the Reference Section of this manual). 2 Refer to Section 18 and remove both wiper arms. 3 Remove the securing screws and plastic clips, and withdraw the cowl panel (see illustrations). 4 Disconnect the motor wiring plug. 5 Slacken and withdraw the motor and linkage securing bolts, then withdraw the assembly from the bulkhead (see illustrations).
17.3a Remove the securing screws and plasUc clips... 17.3b ... and withdraw the cowl panel 17.5a Wiper motor and linkage left-hand ...

12*12 Body electrical systems
17.0 If desired, the motor may be detached from the linkage by removing the securing screws (arrowed) 17.5b ... and right-hand securing bolts (arrowed)
6 If desired, the motor may be detached from the linkage by removing the securing screws (see illustration).
Refitting 7 Refitting Is a reversal of removal, but ensure that the motor drrve is in the 'parked' position before reconnecting ihe crank arm.
18 Wiper arm - fe removal and refitting
Removal 1 Operate the wiper motor, then switch ft off
so that the wiper arm returns to tha at-rest/parked position, 2 If a windscreen or tailgate wiper Is being removed, stick a length of masking tape on tha glass below ihe edge of tha wiper blade, to use as an alignment aid on refitting. 3 Where applicable, lift up the wiper arm spindle nut cover, then slacken and remove the spindle nut (see illustrations). 4 Lift the blade of
I
the glass, and pull the wiper arm off its spindle. If necessary, the aim can be carefully lavered off the spindle using a suitable fiat-bladed screwdriver. If both windscreen wiper arms are removed, note their locations, as different arms are fitted to the driver's and passenger's sides.
Refitting 5 Ensure that the wiper arm and spindle splines are dean and dry. 6 When refitting a windscreen or tailgate wiper arm, refit tha arm to the spindle,
aMgnhg
the wiper blade with the tape fitted before removal. If both windscreen wiper arms have been removed, ensure that the arms are refitted to their correct positions as noted before removal. 7 Rflfit the spindle nut, tighten It securely,
ana
where applicable, clip the nut cover back into position.
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