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1991 Mercury Grand Marquis CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Mercury REPAIR SHOPS DON'T WANT YOU TO KNOW
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- A/C & Heater Service
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- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Mercury Grand Marquis car and truck
repair procedures including Mercury engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Mercury Grand Marquis automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1991 Mercury Grand Marquis AUTOMOBILES
A/C & Cooling System Maintenance -> Ford Motor Co. -> 1990-2002 Ford Crown Victoria & Mercury Grand Marquis
Vehicle: 1991 Mercury Grand Marquis 5.0 V8 GAS
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BRAKE SERVICE PROCEDURES FOR 1991 Mercury Grand Marquis AUTOMOBILES
DRUM BRAKES, FORD MOTOR CO. -> Types 1 & 2 -> INSTALLATION
Vehicle: 1991 Mercury Grand Marquis 5.0 V8 GAS
- Lightly lubricate backing plate shoe contact surfaces with suitable brake lube.
- On type 1 brakes, assemble parking brake lever to secondary shoe and secure with spring washer and retaining clip. Crimp ends of clip with suitable pliers.On type 2 brakes, engage parking brake lever tang with secondary shoe.
- Position brake shoes on backing plate, primary (short lining) shoe facing front of vehicle and secondary (long lining) facing rear. Secure brake shoes with hold-down springs, pins and retainers.
- Install parking brake link and spring between shoes.
- Loosen parking brake adjustment nut, t...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Mercury Grand Marquis AUTOMOBILES
Ford Motor Co. Passenger Cars -> Fuel Shutoff Switch Location -> 1988-92 Crown Victoria, Grand Marquis & Marauder -> Sedan -> Wagon
Vehicle: 1991 Mercury Grand Marquis 5.0 V8 GAS
Sedan
The inertia switch is located at the lefthand...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Mercury Grand Marquis AUTOMOBILES
DRIVESHAFT, Replace
Vehicle: 1991 Mercury Grand Marquis 5.0 V8 GAS
- Raise and support vehicle.
- Index-mark driveshaft. Place a paint index-mark on pinion flange to driveshaft centering socket yoke.
- Remove driveshaft-to-driveshaft pinion flange bolts.
- Place a paint index-mark on driveshaft slip-yoke to transmissio...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Mercury Grand Marquis AUTOMOBILES
Starter, Replace
Vehicle: 1991 Mercury Grand Marquis 5.0 V8 GAS
- Disconnect battery ground cable.
- Raise vehicle on hoist.
- Disconnect starter cable and relay connector from starter solenoid.
- Remove starter motor mounting bolts.
- Rem...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Mercury Grand Marquis AUTOMOBILES
Ford Motor Co. Cars -> Check Engine Lamp/Malfunction Indicator Lamp (MIL)/Service Engine Soon Lamp -> 1990-94 Models w/EEC-IV
Vehicle: 1991 Mercury Grand Marquis 5.0 V8 GAS
This lamp should light when the ignition is turned On. After the engine is started, the lamp should go off, unless a fault condition is detected by the EEC-IV system. Following diagnosis and repair, the Check Engine/MIL lamp will automatically reset when the stored codes are cleared from the EEC-IV system memory. After diagnosis and repair, the EEC-IV memory may be cleared of stored codes as follows:
- With ignition turned Off, connect a jumper wire between Self Test and Self Test Input (STI) connectors, Fig. . On Crown Victoria, Grand Marquis and Town Car models, the...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Mercury Grand Marquis AUTOMOBILES
Radiator, Replace
Vehicle: 1991 Mercury Grand Marquis 5.0 V8 GAS
- Disconnect battery ground cable.
- Drain cooling system into a suitable container.
- Disconnect coolant recovery hose at radiator.
- Disconnect upper radiator hose.
- Disconnect lower radiator hose.
- Disconnect transmission oil cooler lines.
- Remove two upper shroud retaining bolts at radiator support.
- Lift fan shroud sufficiently to disengage lower retaining clips and lay sh...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1991 Mercury Grand Marquis AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1991 Mercury Grand Marquis 5.0 V8 GAS
- Rotate or lift the belt tensioner arm, using a suitable tool to relieve tension from dr...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Mercury Grand Marquis AUTOMOBILES
Component location diagrams for most 1991 Mercury Grand Marquis cars and light trucks sold in the U.S. from 1990+.
 LH Side Of Cargo Compartment Diagram for 1991 Mercury Grand Marquis 5.0 V8 GASComponents on diagram: |
 RH Side Of Luggage Compartment Diagram for 1991 Mercury Grand Marquis 5.0 V8 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1991 Mercury Grand Marquis AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Mercury Grand Marquis cars and light trucks sold in the U.S.
 1991 Mercury Grand Marquis 5.0 V8 GAS Wiring DiagramComponents on diagram: |
 1991 Mercury Grand Marquis 5.0 V8 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Mercury Grand Marquis AUTOMOBILES
OEM TSB listings for most 1991 Mercury Grand Marquis cars and light trucks sold in the U.S. from 1985+.
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Document: MERCON ATF IS BRING REPLACED BY MERCON V ATF AS A SERVICE FLUID Vehicle: 1991 Mercury Grand Marquis 5.0 V8 GAS Auto Systems: |
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Document: FRONT WIPER MOTOR - MOUNTING BRACKET AND DEPRESSED PARK OUT ARM - TRANSFER SERVICE TIPS Vehicle: 1991 Mercury Grand Marquis 5.0 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Mercury Grand Marquis AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Mercury Grand Marquis cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 1991 Mercury Grand Marquis cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 1991 Mercury Grand Marquis cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 1991 Mercury Grand Marquis cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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