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2003 Mercury Grand Marquis CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Mercury REPAIR SHOPS DON'T WANT YOU TO KNOW
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- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
A/C & HEATER SERVICE PROCEDURES FOR 2003 Mercury Grand Marquis AUTOMOBILES
Computer Relearn Procedures -> Ford Motor Co. -> 1999-2002 -> 2003-04 -> Automatic Data Transfer -> Except 1999-2002 -> Manual Data Entry -> Powertrain Control Module (PCM)
Vehicle: 2003 Mercury Grand Marquis 4.6 V8 GAS
Powertrain Control Module (PCM)
Except 1999-2002
Disconnect negative battery cable for a minimum of five minutes. After clearing memory, it is required to drive vehicle a minimum of 10 miles to allow PCM time to relearn operating strategy.
1999-2002
Automatic Data Transfer
- Prior to removing old PCM, connect a suitably programmed scan tool to Data Link Connector (DLC).
- Follow scan tool manufacturers' instructions to download data from old PCM.
- Install new PCM and connect scan tool to DLC.
- Follow scan tool manufactur...
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BRAKE SERVICE PROCEDURES FOR 2003 Mercury Grand Marquis AUTOMOBILES
Anti-lock Brakes -> Crown Victoria, Grand Marquis, Marauder & Town Car -> System Service -> 1999 -> 2000-03 -> Brake System Bleed -> Component Replacement -> Front Speed Indicator Ring -> Front Wheel Sensor -> Hydraulic Control Unit -> Installation -> Rear Speed Indicator Ring -> Rear Wheel Sensor -> Removal -> Stop Lamp Switch
Vehicle: 2003 Mercury Grand Marquis 4.6 V8 GAS
Brake System Bleed
Refer to "Hydraulic Brake Systems" for bleed procedure.
Component Replacement
Hydraulic Control Unit
1999
- Disconnect connector attaching anti-lock brake module to wire harness.
- Remove tubes from inlet ports of pump motor and tubes from outlet ports of brake pressure control valve block. Plug each port to prevent brake fluid from spilling on paint and wiring.
- Remove HCU to mounting bracket retaining nuts, then tip rear of HCU up and pull rearward to slide forward mounting pins out of the retaining grommets.
- Remove HCU from vehicle.
- Reverse procedure to install, noting the ...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Mercury Grand Marquis AUTOMOBILES
Ford Motor Co. Passenger Cars -> Fuel Filter Replacement -> Except 2002-05 Thunderbird, 2000-06 LS, 1984-87 Escort, Tracer, Tempo & Topaz 2.0L Diesel Engine & 1984-85 Continental & Mark VI 2.4L Diesel Engine
Vehicle: 2003 Mercury Grand Marquis 4.6 V8 GAS
Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.
Prior to disconnecting fuel lines, the fuel system pressure must be relieved to prevent accidental spray of fuel.
When installing the fuel filter, ensure the flow arrow is facing in the pro...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Mercury Grand Marquis AUTOMOBILES
DRIVESHAFT U-JOINT, Replace -> Assemble -> Disassemble
Vehicle: 2003 Mercury Grand Marquis 4.6 V8 GAS
Disassemble
Do not clamp driveshaft in jaws of a vice or a similar holding fixture.
- Place driveshaft on a suitable workbench.
- Mark positions of driveshaft components relative to driveshaft tube. This ensures all components are reassembled in same relationship to maintain correct balance.
- Index driveshaft and driveshaft components.
- Clamp U-Joint Tool in a vise.
- Remove snap rings.
- If bearing cup cannot be pressed all way out, remove it with vise grips.
- Remove driveshaft slip-yoke.
- Position driveshaft in U-Joint Tool.
- Press out a bearing cup.
- Rotate driveshaft 180 degrees.
- Press on...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Mercury Grand Marquis AUTOMOBILES
Starter, Replace
Vehicle: 2003 Mercury Grand Marquis 4.6 V8 GAS
- Disconnect battery ground cable.
- Raise and support vehicle.
- Remove starter motor solenoid terminal cover and disconnect cables.
- Remove bolt, then position transmission cooler lines and bracket aside.
- Remove upper starter motor mounting bolts, lower bolt, then starter motor...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Mercury Grand Marquis AUTOMOBILES
Ford Motor Co. Cars -> Message Center -> Crown Victoria, Grand Marquis & Town Car
Vehicle: 2003 Mercury Grand Marquis 4.6 V8 GAS
The message center may be located to the right of the instrument cluster, or it may be a part of the cluster itself. It consists of three buttons: Select, E/M and Reset. The E/M button switches the display betw...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 Mercury Grand Marquis AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 2003 Mercury Grand Marquis 4.6 V8 GAS
Inlet
- Drain cooling system into a suitable container.
- Reposition heater hose inlet clamp at heater core.
- Remove heater inlet hose from heater core.
- Reposition heater core inlet hose clamp at engine.
- Remove hose from engine.
- Remove hose from vehicle.
- Reverse procedure to in...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Mercury Grand Marquis AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Mercury Grand Marquis 4.6 V8 GAS
- Rotate tensioner away from belt using a breaker bar installed in 1/2 inch square hole in tensioner arm.
- Lift old belt over alternator pulley...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Mercury Grand Marquis AUTOMOBILES
Component location diagrams for most 2003 Mercury Grand Marquis cars and light trucks sold in the U.S. from 1990+.
Behind Rear Seats Diagram for 2003 Mercury Grand Marquis 4.6 V8 GAS Components on diagram: |
Starter Motor Diagram for 2003 Mercury Grand Marquis 4.6 V8 GAS Components on diagram: |
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WIRING DIAGRAMS FOR 2003 Mercury Grand Marquis AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Mercury Grand Marquis cars and light trucks sold in the U.S.
2003 Mercury Grand Marquis 4.6 V8 GAS Wiring Diagram Components on diagram: |
2003 Mercury Grand Marquis 4.6 V8 GAS Wiring Diagram Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Mercury Grand Marquis AUTOMOBILES
OEM TSB listings for most 2003 Mercury Grand Marquis cars and light trucks sold in the U.S. from 1985+.
Document: WHITE FLAKES COMING FROM A/C VENTS - REVISED Vehicle: 2003 Mercury Grand Marquis 4.6 V8 GAS Auto Systems: |
Document: RECALL - CERTAIN 1992-2003 MODEL YEAR CARS AND TRUCKS - FUSED JUMPER HARNESS REPLACEMENT FOR VEHICLES SERVICED WITH AN INCOMPATIBLE FUSED JUMPER HARNESS Vehicle: 2003 Mercury Grand Marquis 4.6 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Mercury Grand Marquis AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 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 2003 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 2003 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 2003 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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