1989 FORD FIESTA audio

1 General information,precautions and battery
disconnection
General information
The engine electrical system consists
mainly of the charging and starting systems.
Because of their engine-related functions,
these components are covered separately
from the body electrical devices such as the
lights, instruments, etc (which are covered in
Chapter 12). Information on the ignition
system is covered in Part B of this Chapter.
The electrical system is of the 12-volt
negative earth type. The battery is of the low maintenance or
“maintenance-free” (sealed for life) type and is
charged by the alternator, which is belt-driven
from the crankshaft pulley. The starter motor is of the pre-engaged
type incorporating an integral solenoid. On
starting, the solenoid moves the drive pinion
into engagement with the flywheel ring gear
before the starter motor is energised. Once
the engine has started, a one-way clutch
prevents the motor armature being driven by
the engine until the pinion disengages from
the flywheel.
Precautions
Further details of the various systems are
given in the relevant Sections of this Chapter.
While some repair procedures are given, the
usual course of action is to renew the
component concerned. The owner whose
interest extends beyond mere component
renewal should obtain a copy of the
“Automobile Electrical & Electronic Systems
Manual” , available from the publishers of this
manual. It is necessary to take extra care when
working on the electrical system to avoid
damage to semi-conductor devices (diodes
and transistors), and to avoid the risk of
personal injury. In addition to the precautions
given in “Safety first!” at the beginning of this
manual, observe the following when working
on the system:
Always remove rings, watches, etc before
working on the electrical system. Even with
the battery disconnected, capacitive
discharge could occur if a component’s live
terminal is earthed through a metal object.
This could cause a shock or nasty burn. Do not reverse the battery connections.
Components such as the alternator, electronic
control units, or any other components having
semi-conductor circuitry could be irreparably
damaged. If the engine is being started using jump
leads and a slave battery, connect the
batteries positive-to-positive and negative-to-
negative (see “Jump starting” ). This also
applies when connecting a battery charger.
Never disconnect the battery terminals, the
alternator, any electrical wiring or any test instruments when the engine is running.
Do not allow the engine to turn the
alternator when the alternator is not
connected. Never “test” for alternator output by
“flashing” the output lead to earth.
Never use an ohmmeter of the type
incorporating a hand-cranked generator for
circuit or continuity testing.
Always ensure that the battery negative lead
is disconnected when working on the
electrical system. Before using electric-arc welding
equipment on the car, disconnect the battery,
alternator and components such as the fuel
injection/ignition electronic control unit to
protect them from the risk of damage.
Battery disconnection
Several systems fitted to the vehicle require
battery power to be available at all times, either
to ensure that their continued operation (such as
the clock) or to maintain control unit memories
(such as that in the engine management
system’s ECU) which would be wiped if the
battery were to be disconnected. Whenever the
battery is to be disconnected therefore, first note
the following, to ensure that there are no
unforeseen consequences of this action:
a) First, on any vehicle with central locking, it is a wise precaution to remove the key
from the ignition, and to keep it with you,
so that it does not get locked in, if the
central locking should engage accidentally
when the battery is reconnected.
b) On cars equipped with an engine
management system, the system’s ECU will
lose the information stored in its memory -
referred to by Ford as the “KAM” (Keep-
Alive Memory) - when the battery is
disconnected. This includes idling and
operating values, and any fault codes
detected - in the case of the fault codes, if
it is thought likely that the system has
developed a fault for which the
corresponding code has been logged, the
vehicle must be taken to a Ford dealer for
the codes to be read, using the special
diagnostic equipment necessary for this.
Whenever the battery is disconnected, the
information relating to idle speed control
and other operating values will have to be
re-programmed into the unit’s memory.
The ECU does this by itself, but until then,
there may be surging, hesitation, erratic idle
and a generally inferior level of
performance. To allow the ECU to relearn
these values, start the engine and run it as
close to idle speed as possible until it
reaches its normal operating temperature,
then run it for approximately two minutes at
1200 rpm. Next, drive the vehicle as far as
necessary - approximately 5 miles of varied
driving conditions is usually sufficient - to
complete the relearning process.
c) If the battery is disconnected while the alarm system is armed or activated, the
alarm will remain in the same state when the battery is reconnected. The same
applies to the engine immobiliser system
(where fitted).
d) If a Ford “Keycode” audio unit is fitted,
and the unit and/or the battery is
disconnected, the unit will not function
again on reconnection until the correct
security code is entered. Details of this
procedure, which varies according to the
unit and model year, are given in the
“Ford Audio Systems Operating Guide”
supplied with the vehicle when new, with
the code itself being given in a “Radio
Passport” and/or a “Keycode Label” at
the same time. Ensure you have the
correct code before you disconnect the
battery. For obvious security reasons, the
procedure is not given in this manual. If
you do not have the code or details of the
correct procedure, but can supply proof
of ownership and a legitimate reason for
wanting this information, the vehicle’s
selling dealer may be able to help.
Devices known as “memory-savers” (or
“code-savers”) can be used to avoid some of
the above problems. Precise details vary
according to the device used. Typically, it is
plugged into the cigarette lighter, and is
connected by its own wires to a spare battery;
the vehicle’s own battery is then disconnected
from the electrical system, leaving the
“memory-saver” to pass sufficient current to
maintain audio unit security codes and ECU
memory values, and also to run permanently-
live circuits such as the clock, all the while
isolating the battery in the event of a short-
circuit occurring while work is carried out.
Warning: Some of these devices
allow a considerable amount of
current to pass, which can mean
that many of the vehicle’s
systems are still operational when the
main battery is disconnected. If a
“memory-saver” is used, ensure that the
circuit concerned is actually “dead” before
carrying out any work on it!
2 Electrical fault finding - general information
Refer to Chapter 12.
3 Battery -testing and charging
1
Standard and low maintenance
battery - testing
1If the vehicle covers a small annual mileage,
it is worthwhile checking the specific gravity
of the electrolyte every three months to
determine the state of charge of the battery.
Use a hydrometer to make the check and
compare the results with the following table.
5A•2 Starting and charging systems
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BulbsWattage
Headlight (halogen) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . H4, 60/55
Sidelight (front) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . 5
Direction indicators (main) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Side direction indicator repeaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Auxiliary driving and foglights (S and XR2i) . . . . . . . . . . . . . . . . . . . . . . H3, 55
Stop/tail light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . 21/5
Rear foglight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . 21
Reversing light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . 21
Number plate light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . 10
Interior light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . . . . . . 10
Luggage compartment light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Instrument warning lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
1.3 or 2.6
Panel illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . 1.3 or 2.6
Cigarette lighter illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4
Automatic transmission selector illumination . . . . . . . . . . . . . . . . . . . . . 2
Lubricants
Grease for windscreen wiper linkage and pivots . . . . . . . . . . . . . . . . . . To Ford specification SAM-1C-911-A
Torque wrench settingsNm lbf ft
Wiper motor to bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 8 to 9 6 to 7
Wiper motor bracket to bulkhead/tailgate . . . . . . . . . . . . . . . . . . . . . . . 6 to 8 4 to 6
Windscreen wiper crank to driving shaft nut . . . . . . . . . . . . . . . . . . . . . 22 to 24 16 to 18
Windscreen/tailgate wiper arm retaining nut . . . . . . . . . . . . . . . . . . . . . 17 to 18 12 to 13
Windscreen wiper pivot shaft nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 to 12 7 to 9
Windscreen/tailgate washer reservoir securing bolts . . . . . . . . . . . . . . . 2.5 to 3.5 2 to 3
Headlight retaining bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. 5.4 to 7.0 4 to 5
Tail light securing nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 1.5 to 2.5 1 to 2
Auxiliary light retaining nut (S models) . . . . . . . . . . . . . . . . . . . . . . . . . . 6.8 to 9.2 5 to 7
Horn bracket retaining bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 to 33 18 to 24
Starter inhibitor switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . 9 to 14 7 to 10
Body electrical systems 12•3
12
1595Ford Fiesta Remake
1 General information and
precautions
General information
The electrical system is of 12-volt negative
earth type. Power for the lights and all
electrical accessories is supplied by a
lead/acid battery, which is charged by the
engine-driven alternator.
This Chapter covers repair and service
procedures for the various electrical
components not associated with the engine.
Information on the battery, ignition system,
alternator, and starter motor can be found in
Chapter 5A and B.
All models from 1994 onwards are fitted
with a driver’s air bag, which is designed to
prevent serious chest and head injuries to the
driver during an accident. A similar bag for the
front seat passenger is also available. The
combined sensor and electronics for the air
bag is located next to the steering column
inside the vehicle, and contains a back-up
capacitor, crash sensor, decelerometer,
safety sensor, integrated circuit and
microprocessor. The air bag is inflated by a
gas generator, which forces the bag out of the module cover in the centre of the steering
wheel. A “clock spring” ensures that a good
electrical connection is maintained with the air
bag at all times - as the steering wheel is
turned in each direction, the spring winds and
unwinds.
An anti-theft alarm system is available on
later models, and is triggered if the vehicle is
broken into through the doors, bonnet, or
tailgate. The alarm will also be triggered if the
ignition or audio equipment is tampered with.
Additionally, from the 1994 model year
onwards, a Passive Anti-Theft System (PATS)
is fitted. This system, (which works
independently of the standard alarm) prevents
the engine from being started unless a
specific code, programmed into the ignition
key, is recognised by the PATS transceiver.
Precautions
Warning: Before carrying out
any work on the electrical
system, read through the
precautions given in “Safety
first!” at the beginning of this manual and
in Chapter 5A, Section 1.
Caution: Prior to working on any
component in the electrical system, the
battery negative lead should first be
disconnected, to prevent the possibility of electrical short-circuits and/or fires. If a
radio/cassette player with anti-theft
security code is fitted, refer to the
information given in the reference sections
of this manual before disconnecting the
battery.
2 Electrical fault-finding
-
general information
2
Note: Refer to the precautions given in
“Safety first!” and in Section 1 of this Chapter
before starting work. The following tests relate
to testing of the main electrical circuits, and
should not be used to test delicate electronic
circuits (such as engine management
systems), particularly where an electronic
control unit is used. Also refer to the
precautions given in Chapter 5A, Section 1.
General
1 A typical electrical circuit consists of an
electrical component, any switches, relays,
motors, fuses, fusible links or circuit breakers
related to that component, and the wiring and
connectors which link the component to both
the battery and the chassis. To help to
pinpoint a problem in an electrical circuit,
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illustration). If possible, it is preferable to
obtain purpose-made rods from an audio
specialist, as these have cut-outs which snap
firmly into the clips so that the radio can be
pulled out. Pull the unit squarely from its
aperture, or it may jam.
4 With the radio/cassette sufficiently
withdrawn, disconnect the feed, earth, aerial
and speaker leads.
5 Remove the tools from the unit by gently
wiggling and pulling.
Refitting
6 Refitting is a reversal of removal. When the
leads are reconnected to the rear of the unit,
press it into position to the point where the
retaining clips are felt to engage. Reactivate
the unit in accordance with the code and the
instructions given in the Ford Audio Operating
Manual supplied with the vehicle.
23 Speakers -
removal and refitting
3
Removal
1 Disconnect the battery negative (earth) lead
(refer to Chapter 5A, Section 1).
Front speaker
2 Remove the side door inner trim panel as
described in Chapter 11.
3 Remove the four screws securing the
speaker assembly to the door and withdraw the speaker from the door. Disconnect its
multi-plug as it is withdrawn
(see illustration).
Rear speaker
4The rear speakers are suspended beneath
the parcel shelf supports and are secured in
position by locating tags and screws.
5 Remove the securing screws then lower the
speaker, disengaging its locating tags from
the parcel shelf support (see illustrations).
Disconnect its multi-plug as it is withdrawn.
Refitting
6 Refitting is a reversal of the removal
procedure.
24 Speaker balance control
joystick - removal and refitting
1
Removal
1Disconnect the battery negative (earth) lead
(refer to Chapter 5A, Section 1).
2 Using a thin flat-bladed screwdriver, carefully
prise the joystick assembly out of the facia. Use
a piece of card or similar to prevent damage to
the facia. Withdraw the assembly so that its
multi-plug may be disconnected, then remove it
from the vehicle (see illustration) .
Refitting
3To refit, first connect its multi-plug then
push home to secure.
4 Reconnect the battery negative lead.
25 Radio aerial -
removal and refitting
2
Note : The roof-mounted aerial mast section
should be removed prior to using an
automatic carwash. This is achieved by
unscrewing it from the aerial base.
Removal
1 Disconnect the battery negative (earth) lead
(refer to Chapter 5A, Section 1).
2 Unscrew the aerial mast section, then
remove the base section as follows. Insert a
thin flat-bladed screwdriver into the slot in the
interior (courtesy) light assembly and carefully
lever the assembly out.
3 Through the resultant opening, the aerial
base securing screw is accessible. Remove
the screw and detach the aerial base from the
roof of the vehicle, having noted the aerial
lead fitment.
Refitting
4 Refitting is a reversal of the removal
procedure, ensuring that the aerial base sits
squarely on the roof. Insert the switch end of
the light assembly to its aperture first, then
pivot the light upwards and push home to
secure.
26 “Lights-on” warning module
- removal and refitting
1
Removal
The “lights-on” warning feature is fitted to
certain models from 1993 onwards. The
warning module, which resembles an ordinary
relay, is located behind the facia, between the
steering column and radio/cassette player. It
can be removed by reaching up behind the
facia and unclipping it from its mounting.
Refitting
Refitting is a reversal of removal.
12•16 Body electrical systems
24.2 Carefully prise the speaker balance control joystick from its location23.5b . . . then disengage the locating
tags (A) from their location on the parcel
shelf support (B)23.5a Remove the rear speaker securing screws . . .
23.3 Remove the screws securing thespeaker assembly to the front door22.3 Radio/cassette player extractor tool
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