radio FORD FESTIVA 1991 Service Manual

TURBO BOOST GAUGE & SENSOR (CAPRI)
1. Disconnect 3-pin boost sensor electrical connected located on right side of firewall. Turn ignition on. Measure voltage between
Yellow/Green and Black wires. Voltage should be greater than 10 volts. Turn ignition off. If voltage is greater than 10 volts, go t o n e xt
step. If voltage is 10 volts or less, repair Yellow/Green or Black wires as necessary.
2. Remove instrument panel. See INSTRUMENT PANEL
under REMOVAL & INSTALLATION. Disconnect instrument panel 8-pin
connector. With boost sensor disconnected, measure resistance through White/Black between instrument panel and boost sensor harness
connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair or replace White/Black wire.
3. With 8-pin instrument panel connector disconnected, ground White/Black at boost gauge. Boost gauge should read low. Apply 12 vo l t s
to White/Black wire at boost gauge. Boost gauge should read high. If boost gauge operates as specified, go to next step. If boost gauge
does not operate as specified, replace boost gauge.
4. Reconnect instrument panel connectors (if removed). With ignition on and boost sensor disconnected, install jumper wire between
Yellow/Green and White/Black wires of boost sensor vehicle harness connector. Boost gauge should read high. If boost gauge reads
high, replace boost sensor. If boost gauge does not read high, go to TROUBLE SHOOTING
for other possible causes.
REMOVAL & INSTALLATION
INSTRUMENT PANEL
Removal & Installation (Capri)
1. Disconnect negative battery cable. Pull storage compartment from heater/radio bezel. Pull outward and remove trim covers located on
both sides of steering column. Remove retaining screws and carefully pull instrument panel bezel partially away from dash. Disconnect
electrical connectors from clock and switches in bezel. Remove instrument panel bezel.
2. Disconnect speedometer cable from transaxle. Remove instrument panel retaining screws and slide instrument panel outward. Press lock
tab and release speedometer cable from instrument panel. Remove electrical connectors from rear of instrument panel. Remove
instrument panel. To install instrument panel, reverse removal procedure.
Removal & Installation (Festiva)
1. Disconnect negative battery cable. Remove upper and lower steering column covers. Remove screws from panel bezel and remove bezel.
Disconnect rear wiper switch and rear defogger switch wiring harness connectors (if equipped).
2. Remove instrument panel-to-dash screws. Pull panel from dash. Reach behind panel and release speedometer drive cable lock tab. Lift
lock tabs and disconnect 2 electrical connectors from rear of panel. Remove panel. To install instrument panel, reverse removal
procedure.
INDICATOR LIGHTS
Removal & Installation
Remove instrument panel for access to indicator light bulbs. See INSTRUMENT PANEL under REMOVAL & INSTALLATION. To remove
bulb, rotate bulb counterclockwise to disengage locking tabs. When tabs release, pull bulb from printed circuit board. To install bulb, reverse
removal procedure. Install instrument panel and test lights.
SPEEDOMETER R & I
Removal & Installation (Capri)
R e mo ve n e ga t ive b a t t e r y c a b l e . R e mo ve in st r u me n t p a n e l . S e e INSTRUMENT PANEL under REMOVAL & INSTALLATION. Disassemble
instrument panel and remove speedometer/tachometer/boost gauge assembly from instrument panel. To install, apply a 3/16" (4.6 mm) b al l o f
Silicone Damping Grease (D7AZ-19A331-A) into drive hole of speedometer head. Reverse removal procedure to complete installation.
Removal & Installation (Festiva)
R e mo ve n e ga t ive b a t t e r y c a b l e . R e mo ve in st r u me n t p a n e l . S e e INSTRUMENT PANEL under REMOVAL & INSTALLATION. Disassemble
instrument panel and remove speedometer head assembly from instrument panel. Speedometer is a separate module and can be removed
independently from gauges. To install, reverse removal procedure.
SPEED SENSOR
On vehicles equipped with speed control, a speed sensor is mounted in speedometer head assembly. If replacement is necessary, speedometer
head assembly must be replaced. See SPEEDOMETER R & I
under REMOVAL & INSTALLATION.
FUEL GAUGE
Removal & Installation
Remo ve in st ru men t p an el . See INSTRUMENT PANEL under REMOVAL & INSTALLATION. Disassemble panel and remove fuel gauge.
To install gauge, reverse removal procedure. On Capri, the fuel/volt gauge must be replaced as an assembly.
FUEL SENDING UNIT
Removal & Installation
1. For Festiva, remove rear seat. For Capri, remove rear seat cushion. On Festiva, remove carpet hold-down pins and lift carpet for access
to sending unit access plate. On all models, remove access plate screws. NOTE:Federal law requires that a label stating the odom eter has been repaired or replaced be affixed to any
vehicle that has its odom eter repaired, replaced or set to zero.
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Black/White and Black wire terminals of relay. Check continuity of relay across 2 Black/Yellow wire terminals of relay. Continuity should
exist when relay is energized. When relay is de-energized, continuity should not exist.
FILAMENT TESTING
1. To locate breaks in grid wire filaments, attach a voltmeter to middle portion of each filament. Attach other meter probe to vertical
section of window grid.
2. If a grid is broken, meter will register either zero volt or battery voltage, depending on if grid is broken between or outside test leads. If
wire is not broken, meter will register about one half of battery voltage. To locate break, move probe along wire until meter needle
mo ves ab ru p t l y.
REMOVAL & INSTALLATION
REAR DEFOGGER SWITCH
Removal & Installation (Capri)
1. Disconnect negative battery cable. Pull out center storage compartment. Remove 2 nuts, 2 lower screws, and heater/radio bezel. Pull
outward and remove 2 trim covers, one located on each side of steering column.
2. Remove instrument panel bezel retaining screws and pull instrument bezel from dash. Disconnect electrical connector from rear
defogger switch. Depress tangs on both sides of switch and remove switch. To install, reverse removal procedure.
Removal & Installation (Festiva)
Disconnect negative battery cable. Remove steering column covers. Remove screws securing instrument panel bezel to instrument panel. Pull
instrument bezel away from instrument panel. Disconnect electrical connectors from switches in bezel. Compress rear defogger switch lock
tabs and remove switch from bezel. To install, reverse removal procedure.
WIRING DIAGRAMS
See appropriate chassis wiring diagram in the WIRING DIAGRAMS Section.
Copyr ight 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.
Article GUID: A00028302
Page 3 of 3 MITCHELL 1 ARTICLE - DEFOGGER - REAR WINDOW 1991 ACCESSORIES & SAFETY EQUIPMENT Rear Window D
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Fig. 4: Locating Ground G201

Courtesy of FORD MOTOR CO.
SYSTEM TESTS
POW ER REAR VIEW MIRROR
RM1: Check Remote Control Mirror
Check the operation of the remote control mirrors in all switch positions. If remote control mirror not working at all, go to next step. If one or
more, but not all, switches not working, go to RM7: Check Remote Control Mirror Switch
.
RM2: Check Related Systems
Check the radio and cigar lighter. Do they work? If yes, go to step RM5: Check Remote Control Mirror Supply . If no, go to next step.
RM3: Check Cigar Fuse
Check the 15 amp CIGAR fuse. Is fuse OK? If yes, go to next step. If no, replace the 15 amp CIGAR fuse.
RM4: Check ACC Supply
Ignition switch in the ACC position. Check for 12 volts on the Blue/Red wire wire at the ignition switch. See Fig. 5 Is there 12 volts? If yes,
repair the Blue/Red wire between the CIGAR fuse and ignition switch. If no, repair or replace the ignition switch, White wire from the ignition
switch to the main fuse box, or the MAIN fuse as required.
NOTE:If the fuse blows again, check for shorts to ground in the Blue/Yellow wires. Repair the Blue/Yellow
wires as needed.
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2. Disconnect the wiring at the mirror.
3. Remove the attaching screws and the mirror.
4. Remove the seal from the mirror. See Fig. 9
.
Installation
To install, reverse the removal procedure.

Fig. 9: Removing & Installing Power Rear View Mirror

Courtesy of FORD MOTOR CO.
REMOTE MIRROR SWITCH
Removal
1. Remove the left radio speaker grille by carefully prying it up with a screwdriver.
2. Remove the four speaker attaching screws and the radio speaker. See Fig. 10
.
3. Using a screwdriver, pry at the bottom of the switch casing to loosen the remote mirror switch. See Fig. 11
. To prevent marring the
instrument panel, place a pad or clean rag between the blade and the instrument panel.
4. Reach through the speaker opening and disconnect the electrical connector.
5. Remove the remote mirror switch.
Installation
To install, reverse the removal procedure.
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Fig. 10: Identifying Radio Speaker Attaching Screws

Courtesy of FORD MOTOR CO.

Fig. 11: Removing Remote Mirror Switch

Courtesy of FORD MOTOR CO.
WIRING DIAGRAMS
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3. Position Steering Wheel Remover (T67L-3600-A) on steering wheel. Tighten bolt on remover until steering wheel is loose. Remove
steering wheel puller, steering wheel retaining bolt, and steering wheel.
Installation
1. Ensure front wheels are in straight-ahead position. Route clockspring wiring harness through steering wheel opening. Position steering
wheel on steering shaft and align reference marks.
2. Ensure clockspring wire is not pinched when positioning steering wheel. Install new steering wheel retaining bolt and tighten to
specification. See TORQUE SPECIFICATIONS table at end of article. Connect horn and speed control wiring connectors (if equipped)
to steering wheel.
3. Connect air bag module-to-clockspring connector. Install air bag module. Tighten air bag module retaining nuts to specification.
Activate SRS. See SAFETY PRECAUTIONS. Check AIR BAG light to ensure system is functioning properly.
Removal (Festiva)
From back of steering wheel, remove 2 screws securing horn pad. Disconnect horn wire from horn pad and remove pad. Remove steering
wheel nut. Scribe reference mark on steering shaft and steering wheel hub for reassembly. Using Steering Wheel Puller (T67L-3600-A),
remove steering wheel.
Installation
Position steering wheel on steering shaft and align reference marks. Be sure cutouts in rear cover engage turn signal canceling cam. To
complete installation, reverse removal procedure.
COMBINATION SW ITCH
Removal (Capri)
1. Disconnect negative battery cable. Remove lower steering column cover. Remove center access panel and trim cover under steering
column. Remove left side defroster connector tube. Remove steering column upper retaining bolts. Column will pivot downward and
rest on instrument panel brace.
2. Remove 2 switch retaining screws and remove switch. Grasp switch and lever and pull lever out of switch. Disconnect switch electrical
connectors and remove switch.
Installation
Align key with slot and install lever in switch assembly. Position switch on steering column and install retaining screws. To complete
installation, reverse removal procedure.
Removal (Festiva)
1. Disconnect negative battery cable. Remove steering wheel. See STEERING WHEEL & HORN PAD under REMOVAL &
INSTALLATION. Remove 4 screws from upper half of lower steering column cover and remove cover. Remove upper steering column
cover. Remove 5 clips from lower half of lower steering column cover and remove cover.
2. Release wiring harness clip and unplug 4 harness connectors from back of combination switch. From below steering column, loosen
band clamp securing switch hub to steering column jacket. Pull switch assembly from steering column.
Installation
Slide combination switch assembly onto steering column. Make sure switch assembly is seated and level against end of column jacket. To
complete installation, reverse removal procedure.
HEADLIGHT SWITCH
Removal & Installation (Capri)
1. Headlight off/on switch is located on left side of instrument panel bezel. Disconnect negative battery cable. Pull out center storage
compartment. Remove 2 upper screws, 2 lower screws and heater/radio bezel. Pull outward and remove trim covers located on both
sides of steering column.
2. Remove retaining screws and carefully pull instrument panel bezel partially away from dash. Disconnect electrical connector from
headlight switch. Depress tangs on both sides of switch and remove switch from bezel. To install, reverse removal procedure.
IGNITION SWITCH & LOCK CYLINDER
Removal (Capri)
1. Disconnect negative battery cable. Remove lower steering column cover. Remove center access panel and trim cover under steering
column. Remove left side defroster connector tube. Remove steering column upper retaining bolts. Column will pivot downward and
rest on instrument panel brace. steering colum n.
CAUT ION: Rem ove steering wheel carefully to avoid dam aging clockspring wiring, air bag m odule connector, or
accidentally turning clockspring. After steering wheel rem oval, tape clockspring in position to prevent
dam age and keep it from being turned accidentally.
CAUTION: Ensure that no wiring is pinched beneath steering colum n when lowered.
Page 4 of 5 MITCHELL 1 ARTICLE - STEERING COLUMN SWITCHES 1991 ACCESSORIES & SAFETY EQUIPMENT Ford Motor C
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ELECT RICAL COMPONENT LOCAT OR
1991-92 ELECT RICAL COMPONENT LOCAT ION Ford Motor Co. Electrical Com ponents
BUZZERS, RELAYS & TIMERS
BUZZERS, RELAYS & TIMERS LOCATION
CIRCUIT PROTECTION DEVICES
CIRCUIT PROTECTION DEVICES LOCATION
CONTROL UNITS
CONTROL UNITS LOCATION
SENDING UNITS & SENSORS
SENDING UNITS & SENSORS LOCATION
MOTORS
MOTORS LOCATION
ComponentLocation
A/C Clutch Relay (1991)On right front of engine bay, near power
steering pump.
A/C RelayOn left front corner of engine bay, left of
cooling fan. See Fig. 1
& Fig. 2
A/C Wide Open Throttle (WAC) RelayOn left front corner of engine bay, left of
cooling fan. See Fig. 1
& Fig. 2 .
Cooling Fan RelayOn left front fender panel, near
headlight. See Fig. 1
& Fig. 2 .
Condenser Fan RelayOn left front of engine bay, left of
cooling fan. See Fig. 1
& Fig. 2 .
Daytime Running Light (DRL) Relay (Canada) (1992)On left front corner of engine bay, near
headlight. See Fig. 1
.
Fuel Pump RelayBehind left side of dash, near ECA.
Headlight RelayBehind left headlight. See Fig. 1 .
Horn RelayUnder left side of dash. See Fig. 3 .
Main RelayIn left front corner of engine bay, near
battery.
P a r kin g Ligh t R e l a yOn right front corner of engine bay. See
Fig. 1
.
Turn Signal/Flasher RelayUnder left side of dash, behind ECA.
See Fig. 3
.
ComponentLocation
A/C In-Line FuseOn left side of heater case.
Condenser Fan In-Line FuseOn right side of steering column.
Fuse PanelBehind access panel, to left of steering column.
Fusible LinksOn left front strut tower. See Fig. 1 .
ComponentLocation
Electronic Control Assembly (ECA)Behind left side of dash, left of steering column.
Passive Restraint ModuleUnder driver's seat.
ComponentLocation
Airflow MeterOn right front corner of engine bay. See Fig. 1 .
Coolant Temperature Sending UnitBelow thermostat housing.
Crankshaft Position SensorInside distributor. See Fig. 1 .
EGR Temperature Sensor (1991)In exhaust manifold, near EGR valve.
Engine Coolant Temperature (ECT) SensorOn top of engine, near injector No. 1.
Fuel Gauge Sending Unit (1992)In fu el t an k.
Throttle Position Sensor (TPS)On left side of throttle body. See Fig. 1 .
ComponentLocation
Blower MotorUnder center of dash, behind
radio.
Windshield Washer Motors:
Front (1991)On right front fender panel,
bottom of washer reservoir.
Front (1992)On left front corner of engine
bay, in front of battery.
RearOn body panel, behind right
rear quarter panel.
Windshield Wiper Motor
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FUSES & CIRCUIT BREAKERS
Fuses & Circuit Breakers 1988-93 Festiva
FUSES & FUSIBLE LINKS
FUSE PANEL & FUSIBLE LINK BLOCK LOCATIONS
The vehicle has a fuse block with fusible links and a fuse panel with circuit fuses. The fuse panel is located behind the instrument panel, left o
f
the steering column. The fuse block is located under the hood.
FUSE PANEL IDENTIFICATION

Fig. 1: Fuse Panel Identification

Courtesy of FORD MOTOR CO.
Fuse & Circuit Breaker Identification
1 - 15 Amp License Plate Light, Rear Side Marker Ligh t , Fr o n t P a r kin g Ligh t s, C l u st e r a n d Ta il Ligh t s
2 - 15 Amp Horn, Brakelights, High-Mount Brakelight
3 - 15 Amp (1988-89) Safety Belt Warning, Turn & Hazard Warning Flasher Lights, Radio, Trunk Light, Ignition Key Reminder Buzzer
3 - 15 Amp (1990-93) Safety Belt Warning, Turn & Hazard Warning Flasher Lights, Ignition Key Reminder Buzzer
4 - 15 Amp Audio System, Cigarette Lighter, Remote Control Mirror
5 - 15 Amp Rear Wiper/Washer, Daytime Running Light System (Canada)
6 - 15 Amp Heater & Air Conditioner
7 - 20 Amp Heater & Air Conditioner, Cooling Fan System
8 - 10 Amp (1988-89) Interior Courtesy Lights 10 Amp (1990-93) Radio, Interior Courtesy Lights, Luggage Compartment Light
9 - 15 Amp (1988-89) Front Wiper/Washer
9 - 15 Amp (1990-93) Front Wiper/Washer, Shift-Lock System (ATX), Engine Control System
10 - 10 Amp Charging System, Emission Control System
11 - 10 Amp (1988-90) Safety Belt Warning, Turn & Hazard Warning Flasher Lights, Back-Up Lights, Instrument Cluster, Warning
Lights,
11 - 10 Amp (1991-93) Safety Belt Warning, Turn & Hazard Warning Flasher Lights, Back-Up Lights, Instrument Cluster, Warning
Lights, Shift-Lock System
12 - 15 Amp Rear Window Defroster
13 - Not Used (1988-89) Spare
13 - 30 Amp (1990-93) Passive Restraint System (Automatic Seat Belt)
In-Line Fuse Identification
15 Amp (1990-93) Condenser Fan Motor (A/T Models Only)
10 Amp (1990-93) A/C System (located on left side of heater case)
FUSIBLE LINK BLOCK IDENTIFICATION
Page 1 of 3 MITCHELL 1 ARTICLE - FUSES & CIRCUIT BREAKERS Fuses & Circuit Breakers 1988-93 Festiva
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Fig. 3: Horn Circuit

POWER MIRRORS

Fig. 4: Power Mirror Circuit

RADIO
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Fig. 5: Radio Circuits

STARTING/CHARGING

Fig. 6: Charging Circuit

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