1991 FORD FESTIVA engine

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GENERAL INFORMATION
Using Mitchell1's Wiring Diagram s
INTRODUCTION
Mitchell1(R) obtains wiring diagrams and technical service bulletins, containing wiring diagram changes, from the domestic and import
manufacturers. These are checked for accuracy and are all redrawn into a consistent format for easy use. All system wiring diagrams are
available in color format and may be viewed and or printed in color or black and white, depending on your program settings and available
printer hardware.
In the past, when cars were simpler, diagrams were simpler. All components were connected by wires, and diagrams seldom exceeded 4 pages
in length. Today, some wiring diagrams require more than 16 pages. It would be impractical to expect a service technician to trace a wire from
page 1 across every page to page 16.
Removing some of the wiring maze reduces eyestrain and time wasted searching across several pages. Today, the majority of Mitchell1(R)
diagrams follow a much improved format, which permits space for internal switch details, and component and ground locations.
Components shown with a dashed line instead of a solid line indicate not all circuits are shown in this particular diagram (circuits shown in
system diagrams are typically applicable to that system only). The remaining circuits connected to that component will be shown in the
appropriate system that they apply to.
Today, the wiring diagram necessary to support a given repair procedure is included within that article or a link is provided to the appropriate
SYSTEM WIRING DIAGRAM article. For example, the wiring diagram for a Ford EEC-IV system may be included in ENGINE
PERFORMANCE and WIRING DIAGRAMS articles for Ford Motor Co. The wiring diagram for a cruise control system may be included in
ACCESSORIES & EQUIPMENT section for the specific vehicle manufacturer, and the wiring diagram for an anti-lock brake system may be
included in BRAKES and WIRING DIAGRAMS for the specific manufacturer.
WIRING DIAGRAMS contains all wiring diagrams not included in STARTING & CHARGING SYSTEMS and ACCESSORIES &
EQUIPMENT. This includes: Data Link Connectors, Ground Distribution, Power Distribution, Engine Performance, Electric Cooling Fans,
Anti-Lock Brakes, Electronic Suspension and Electronic Steering wiring diagrams. The Data Link Connectors wiring diagrams show the
circuits by which the various on-board computers exchange information, and the diagnostic connectors used for diagnosis and their location.
The Ground Distribution wiring diagrams show all vehicle ground points, their location, and the components common to those ground points.
The Power Distribution wiring diagrams show the power feed circuits and the components common to those power feeds.
Wiring diagrams used to support the information in ACCESSORIES & EQUIPMENT are drawn in a "top-down" format. The diagrams are
drawn with the power source at the top of the diagram and the ground point at the bottom of the diagram. Component locations are identified
on the wiring diagrams. Any wires that do not connect directly to a component are identified on the diagram to indicate where they go.
WIRING DIAGRAM COLOR ABBREVIATIONS
COLOR ABBREVIATIONS
WIRING DIAGRAM SYMBOLS
ColorNormalOptional
BlackBLKBK
BlueBLUBU
BrownBRNBN
ClearCLRCR
Dark BlueDK BLUDK BU
Dark GreenDK GRNDK GN
GreenGRNGN
GrayGRYGY
Light BlueLT BLULT BU
Light GreenLT GRNLT GN
OrangeORGOG
PinkPNKPK
PurplePPLPL
RedREDRD
TanTANTN
VioletVIOVI
WhiteWHTWT
YellowYELYL
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Fig. 2: Ground Numbers & Locations (2001 & Prior Model Years)

WIRING DIAGRAM COMPONENT LOCATIONS
When trying to locate a component in a wiring diagram and you don't know the specific system where it is located, use this handy component
locator to find the system wiring diagram in which the component is located. Then, go to that system and locate the component within the
wiring diagram.
For example, if you don't know the specific system in which the ignition switch is located, look up ignition switch in the wiring diagram
component location tables and go to the appropriate wiring diagram(s) which contain either full or partial views of the ignition switch. The full
view of the ignition switch is located in Power Distribution.
The first listing for the component will be the full or most complete view of the component. Additional listings will be partial views of the
component. Not all components are used on all models.
All components will have a partial view in Ground Distribution and Power Distribution. Data Link Connectors show connecting circuits
between modules. Alternate names for components may be listed in wiring diagram component locations tables.
WIRING DIAGRAM COMPONENT LOCATIONS
ComponentWiring Diagram
ABS Electronic Control UnitAnti-Lock Brakes; Data Link Connectors
ABS Hydraulic UnitAnti-Lock Brakes
Acceleration SensorAnti-Lock Brakes
Accessory Delay RelayPower Windows
A/C Compressor Clutch RelayEngine Performance
A/C SensorEngine Performance
A/C Pressure SwitchEngine Performance
Adaptive Lamp Control ModuleExterior Lights
Air Bag(s)Air Bag Restraint System
Air Bag ModuleAir Bag Restraint System
Air Bag Sensor(s)Air Bag Restraint System
Air Injection Pump RelayEngine Performance
Air Temperature SensorOverhead Console
Alternator (Generator)Generators & Regulators
Anti-Theft Control ModuleAnti-Theft System; Starters
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Autolamp Control RelayHeadlight Systems; Daytime Running Lights
Automatic Shutdown (ASD) RelayEngine Performance; Generators & Regulators
Autostick SwitchEngine Performance
Auxiliary Battery RelayGenerators & Regulators
Back-Up LightsBack-Up Lights; Exterior Lights
Barometric (BARO) Pressure SensorEngine Performance
BatteryPower Distribution
Battery Temperature SensorEngine Performance
Body Control ModuleBody Control Computer; Anti-Theft System; Daytime Running
Lights; Engine Performance; Headlight Systems; Warning Systems
Boost Control SolenoidEngine Performance
Boost SensorEngine Performance
Brake Fluid Level SwitchAnalog Instrument Panels
Brake On/Off (BOO) SwitchCruise Control Systems; Engine Performance; Shift Interlock
Systems
Buzzer ModuleWarning Systems
Camshaft Position (CMP) SensorEngine Performance
Central Control ModuleAnti-Theft System
ClockspringAir Bag Restraint System; Cruise Control Systems; Steering
Column Switches
Clutch Pedal Position SwitchStarters
Clutch Start SwitchStarters
Combination MeterAnalog Instrument Panels
Constant Control Relay Module (CCRM)Engine Performance; Electric Cooling Fans
Convenience CenterPower Distribution; Illumination/Interior Lights
Convertible Top MotorPower Convertible Top
Convertible Top SwitchPower Convertible Top
Crankshaft Position (CKP) SensorEngine Performance
Cruise Control ModuleCruise Control Systems
Cruise Control SwitchCruise Control Systems
Condenser Fan Relay(s)Electric Cooling Fans
Data Link Connector (DLC)Engine Performance
Da yt ime R u n n in g Ligh t s M o d u l eDaytime Running Lights; Exterior Lights
Defogger RelayRear Window Defogger
Diagnostic Energy Reserve Module (DERM)Air Bag Restraint System
Discriminating Sensor (Air Bag)Air Bag Restraint System
DistributorEngine Performance
Door Lock ActuatorsPower Door Locks; Remote Keyless Entry
Door Lock Relay(s)Power Door Locks
Electrochromic MirrorPower Mirrors
Electronic Level Control (ELC) Height SensorElectronic Suspension
Electronic Level Control (ELC) ModuleElectronic Suspension
Engine Coolant Temperature (ECT) Sending UnitAnalog Instrument Panels
Engine Coolant Temperature (ECT) SensorEngine Performance
Engine Control ModuleEngine Performance; Generators & Regulators; Starters
ETACS ECUWarning Systems; Power Windows; Remote Keyless Entry
Evaporative (EVAP) Emissions CanisterEngine Performance
EVAP Canister Purge SolenoidEngine Performance
EVAP Canister Vent SolenoidEngine Performance
Exhaust Gas Recirculation (EGR) ValveEngine Performance
Fuel Tank Vacuum SensorEngine Performance
F o g Ligh t sHeadlight Systems; Daytime Running Lights
F o g Ligh t R e l a yHeadlight Systems; Daytime Running Lights
Fuel Door Release SolenoidPower Fuel Door Release
Fuel Gauge Sending UnitAnalog Instrument Panels
Fuel InjectorsEngine Performance
Fuel PumpEngine Performance
Fuel Pump RelayEngine Performance; Power Distribution
Fuse/Relay BlockPower Distribution
Fusible LinksPower Distribution; Generators & Regulators; Starters
GeneratorGenerators & Regulators; Engine Performance; Power Distribution
Generic Electronic Module (GEM)Body Control Modules; Electronic Suspension
Glow Plug RelayEngine Performance
Glow PlugsEngine Performance
GroundsGround Distribution
Headlight Door ModuleHeadlight Doors
Headlight RelayHeadlight Systems; Daytime Running Lights
HeadlightsHeadlight Systems; Daytime Running Lights
Heated Oxygen Sensor(s) (HO2S)Engine Performance
Heated Windshield Control ModuleHeated Windshields
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Height SensorElectronic Suspension
HornsSteering Column Switches
Horn RelaySteering Column Switches
Idle Air Control (IAC) Motor/ValveEngine Performance
Ignition Coil(s)Engine Performance
Ignition Key Lock CylinderAnti-Theft System
Ignition ModuleEngine Performance
Ignition SwitchPower Distribution; Engine Performance; Generators &
Regulators; Starters
Illuminated Entry ModuleIllumination/Interior Lights
Illumination LightsIllumination/Interior Lights
Impact SensorAir Bag Restraint System
Inertia Fuel Shutoff SwitchEngine Performance
In h ib it Rel ayStarters
Instrument ClusterAnalog Instrument Panels
Intake Air Temperature (IAT) SensorEngine Performance
Interior LightsIllumination/Interior Lights
In t erl o ck Swit chStarters
Junction BlockPower Distribution
Keyless Entry ReceiverRemote Keyless Entry
Key Reminder SwitchStarters
Knock SensorEngine Performance
Lamp Control ModuleExterior Lights
License Plate LampExterior Lights
Lighting Control ModuleLighting Control Modules; Anti-Theft System; Daytime Running
Lights; Headlight Systems
Lower RelayPower Convertible Top
Malfunction Indicator Light (MIL)Engine Performance; Instrument Panels
Manifold Absolute Pressure (MAP) SensorEngine Performance
Mass Airflow (MAF) SensorEngine Performance
Mega FuseGenerators & Regulators
Memory Seat/Mirror ModuleMemory Systems
M ir r o r De fo gge rRear Window Defogger
Moon Roof MotorPower Moon Roof
Moon Roof RelayPower Moon Roof
Multi-Function Control ModuleWarning Systems
Neutral Safety SwitchStarters
Oil Level SwitchEngine Performance
Oil Pressure Switch/Sending UnitAnalog Instrument Panels; Engine Performance
Overhead ConsoleOverhead Console
Oxygen Sensor(s) (O2S)Engine Performance
Parking Brake SwitchAnalog Instrument Panels
Park LightsExterior Lights
Park/Neutral Position SwitchStarters; Engine Performance; Anti-Theft System; Body Control
Module
Perimeter Lighting Control RelayExterior Lights
Power AmplifierPower Antennas
Power Antenna ModulePower Antennas
Power Antenna MotorPower Antennas
Power Distribution CenterPower Distribution; Generators & Regulators; Starters
Power Door Lock MotorsPower Door Locks
Power Mirror MotorsPower Mirrors; Memory Systems
Power Sliding Door ControllerPower Sliding Side Door
Power Seat MotorsPower Seats; Memory Systems
Power Steering Pressure SwitchEngine Performance
Power Top MotorPower Convertible Top
Power Top Relay(s)Power Convertible Top
Powertrain Control ModuleEngine Performance; Analog Instrument Panels; Cruise Control
Systems; Data Link Connectors; Generators & Regulators; Starters
Power Window MotorsPower Windows
Power Window Relay(s)Power Windows
Radiator Fan Motor(s)Electric Cooling Fans
Radiator Fan Relay(s)Engine Performance; Electric Cooling Fans;
Rainsense ModuleWiper/Washer Systems
Raise RelayPower Convertible Top
Remote Anti-Theft Personality (RAP) ModuleAnti-Theft System; Starters; Warning Systems
Seat Belt PretensionersAir Bag Restraint System
Seat Belt Retractor SolenoidPassive Restraints
Seat Belt SwitchAir Bag Restraint System; Passive Restraints
Shift Interlock SolenoidShift Interlock Systems
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Shift Lock ActuatorShift Interlock Systems
Side Marker LightsExterior Lights
SIR Coil Assembly (Clockspring)Air Bag Restraint System
Slip Ring (Clockspring)Air Bag Restraint System; Steering Column Switches
SRS Control ModuleAir Bag Restraint System
Starter MotorStarters
Starter Interrupt RelayStarters
Starter SolenoidStarters
Starter RelayStarters
Steering Wheel Position SensorAnti-Lock Brakes
StoplightsExterior Lights
Stoplight SwitchEngine Performance; Cruise Control Systems; Anti-Lock Brakes
Sun Roof ECUPower Sun Roof
Sun Roof MotorPower Sun Roof
Sun Roof Position SensorPower Sun Roof
TaillightsExterior Lights
Throttle Position (TP) SensorEngine Performance
Torque Converter Clutch Solenoid/SwitchEngine Performance
Traction Control SwitchAnti-Lock Brakes
Trailer Tow ConnectorExterior Lights
Trailer Tow RelayExterior Lights
Transmission/TransaxleEngine Performance
Transmission Control Module (TCM)Engine Performance; Starters
Transmission Range SensorStarters; Back-Up Lights; Engine Performance
Transmission Range SwitchBack-Up Lights; Engine Performance; Anti-Theft System
Turn Signal FlasherExterior Lights
Tu r n S ign a l Ligh t sExterior Lights
Twilight Sentinel SwitchHeadlight Systems; Daytime Running Lights
Vapor Canister Leak Detection PumpEngine Performance
Vehicle Control Module (VCM)Engine Performance
Vehicle Dynamic ModuleElectronic Suspension
Vehicle Speed Control ServoCruise Control Systems
Vehicle Speed SensorData Link Connectors; Analog Instrument Panels; Cruise Control
Systems; Electronic Suspension
Voltage RegulatorGenerators & Regulators
Water-In-Fuel SensorEngine Performance; Analog Instrument Panels
Wheel Speed SensorsAnti-Lock Brakes
Window Timer ModulePower Convertible Top
Windshield Intermittent Wiper RelayWiper/Washer Systems
Windshield Washer MotorWiper/Washer Systems
Wiper MotorWiper/Washer Systems
Copyr ight 2009 Mitchell Repair Information Company, LLC. All Rights Reserved.
Article GUID: A00130983
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Fig. 1: Engine Compartment & Headlights (Grid 1
-3)
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Fig. 2: Computer Engine Control, Fuel Pump System (Grid 4
-7)
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DRIVE BELT ROUTING
1991-92 ENGINE COOLING BELT ROUT ING
BELT ADJUSTMENT
Tensioners may be used to automatically adjust belt tension to specification. Check belt for fraying. If fraying exists, ensure both belt and
tensioner are properly aligned. See Fig. 1
. Tensioners may contain a belt-wear indicator. See Fig. 2 . If tensioner reaches travel limit, as
indicated by marks on tensioner, replace belt. Ensure serpentine belts are properly installed. See Fig. 3
-Fig. 7 . On models without
tensioners, ensure belt tension is within specification. See BELT ADJUSTMENT SPECIFICATIONS table.
BELT TENSION ADJUSTMENT SPECIFICATIONS
(1)
ApplicationNew Belt(2) Used Belt
Continental(3) (3)
Cougar & Thunderbird(3) (3)
Crown Victoria & Grand Marquis
5.0L & 5.8L
1/4" "V" Belt70 (32)50 (23)
6 Rib Belt170 (77)150 (68)
Escort & Tracer
1.8L(4) (5) (4) (5)
1.9L(3) (3)
Mark VII(3) (3)
Mustang(3) (3)
Probe
2.2L & 2.2L Turbo
Alternator(4) (6) (4) (6)
A/C90 (41)90 (41)
Sable & Taurus
2.5L(3) (3)
3.0L (7)
Alternator140-160 (63-67)110-130 (50-59)
P/S & A/C(3) (3)
3.0L SHO
A/C & Alt.220-265(100-120) 148-192 (67-
87)
P/S & W/P154-198 (70-90)112-157 (51-71)
3.8L(3) (3)
Tempo & Topaz
2.3L
Alternator150-170 (68-77)130-150 (59-68)
W/P150-90 (23-41)40-60 (18-27)
Town Car(3) (3)
(1)Tension is measured in Lbs. (kg) using tension gauge.
(2)Used belt is a belt in operation for at least 10 minutes.
(3)Belt tension is automatically adjusted by tensioner.
(4)Manufacturer lists only belt deflection with 22 lbs. applied on belt.
(5)Belt deflection on new belt is .31-.35" (7.9-8.9 mm) or .35-.39" (8.9-9.9 mm) on used belt.
(6)Belt deflection on new belt is .24-.31" (6.1-7.9 mm) or .27-.35" (6.9-8.9 mm) on used belt.
(7)Specification is for models without belt tensioner.
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