2005 Mercury Grand Marquis Service and Repair Manual

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Factory-Grade Data

The 2005 Mercury Grand Marquis Service and Repair Manual is a practical, workshop-ready reference for maintenance, diagnostics, and repairs. Use it to troubleshoot symptoms, follow step-by-step procedures, verify specifications, and confirm wiring and connector locations before replacing parts.

Ideal for technicians and DIY owners, it supports everything from routine service to deeper mechanical and electrical work—including drivability, no-start, warning lights, overheating, brake and suspension issues, HVAC faults, and circuit testing.

Trims covered

  • GS Sedan 4-Door
  • GSL Sedan 4-Door
  • LS Sedan 4-Door
  • Limited Edition Sedan 4-Door
  • Ultimate Edition Sedan 4-Door

Engines covered

  • 4.6L 281Cu. In. V8 GAS SOHC Naturally Aspirated

What’s inside

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

Why this manual matters

  • Faster diagnostics with system-based troubleshooting and wiring diagrams
  • Clear procedures and reference sections to reduce guesswork and rework
  • Helpful for maintenance planning and verifying parts/specs before repairs

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Vehicle Safety Data

2005 Mercury Grand Marquis Recalls & Complaints

NHTSA #13V38500029/08/2013Component: STEERING

Ford is recalling certain model year 2005-2011 Ford Crown Victoria (including Crown Victoria Police Interceptors), Mercury Grand Marquis, and Lincoln Town Car vehicles. The affected vehicles are curre

Consequence

If the lower bearing separates, the vehicle may experience a loss of steering, increasing the risk o

Remedy

Ford will notify owners and dealers will replace the lower intermediate shaft, free of charge. The

NHTSA #15V86100022/12/2015Component: EXTERIOR LIGHTING:HEADLIGHTS

Ford Motor Company (Ford) is recalling certain model year 2003-2005 Ford Crown Victoria and Mercury Grand Marquis vehicles manufactured October 3, 2001, to August 2, 2005. The affected vehicles have

Consequence

A loss of headlights can reduce driver visibility and increase the risk of a crash.

Remedy

Ford will notify owners, and dealers will replace the LCM, free of charge. The recall began April 1

NHTSA #05V51800009/11/2005Component: ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES

ON CERTAIN PASSENGER VEHICLES, THE BATTERY CABLE INCLUDES A FUSIBLE LINK THAT MAY CONTACT AND SUBSEQUENTLY CHAFE ON A #2 CROSS MEMBER ATTACHING BOLT.

Consequence

THIS CONDITION MAY RESULT IN HEAT DAMAGE AND COULD LEAD TO A FIRE.

Remedy

DEALERS WILL INSPECT THE FUSIBLE LINK AND POSITION IT AWAY FROM THE CROSS MEMBER BOLT. IF THE FUSIB

TSB #10205037

Inpected or repaired under 13R01 - Requests for recall service action under 13S08

TSB #10183773

For 2005-2012 Crown Victoria, 2005-2011 Grand Marquis and Town Car vehicles, Regional Program 13R01 applies to vehicles not registered in corrosion states and not included in Safety Recall 13S08, where operation in high corrosion areas for

TSB #10156863

Some 2000 and newer Ford, Lincoln and Mercury vehicles equipped with aluminum body panels may exhibit corrosion concerns appearing as bubbled and/or peeling paint with or without accompanying white dust. Panel replacement is recommended. Fo

TSB #10155551

Some 2000 and newer Ford, Lincoln and Mercury vehicles equipped with aluminum body panels may exhibit corrosion concerns appearing as bubbled and/or peeling paint with or without accompanying white dust. Panel replacement is recommended. Fo

TSB #10109070

The Powertrain Control/Emissions Diagnosis (PC/ED) manual has been revised for diagnosing electronic throttle bodies (ETBs). The ETC_ACT and ETC_DSD PIDs should not used to diagnose possible ETB concerns. The IDS has a limited refresh rate

TSB #10074793

SUMMARY TO BE PROVIDED ON A FUTURE DATE.

TSB #10056190

FORD: SEE DOCUMENT SEARCH BUTTON FOR OWNER LETTER. INFORMATION REGARDING THE LIGHTING CONTROL MODULE EXTENDED WARRANTY COVERAGE, FOR SOME VEHICLES, TO 15 YEARS OR 250,000 MILES, WHICHEVER OCCURS FIRST. MODEL 2003-2005 VICTORIA, GRAND MARQUI

TSB #10055936

FORD: THE LIGHTING CONTROL MODULE HAS EXTENDED WARRANTY COVERAGE, ON CERTAIN VEHICLES, DUE TO A POSSIBLE CRACK ON SOLDER JOINT THAT CONNECTS RELAY TO CIRCUIT BOARD. MODEL 2003-2005 CROWN VICTORIA, GRAND MARQUIS. *PE

Showing the 8 most recent of 32 technical service bulletins on file with NHTSA.

20120124Component: ELECTRICAL SYSTEMCrash reportedFire reported2 injured

UPON STARTING UP 2005 MERCURY MARQUIS (~24000 MILES) AND PLACING CAR INTO DRIVE, CAR ACCELERATED AT A HIGH RATE OF SPEED AND CRASHED INTO A GAS STATION PUMP. THE CAR ACCELERATOR MALFUNCTIONED AND WAS

20120124Component: VEHICLE SPEED CONTROLCrash reportedFire reported2 injured

UPON STARTING UP 2005 MERCURY MARQUIS (~24000 MILES) AND PLACING CAR INTO DRIVE, CAR ACCELERATED AT A HIGH RATE OF SPEED AND CRASHED INTO A GAS STATION PUMP. THE CAR ACCELERATOR MALFUNCTIONED AND WAS

20090526Component: VEHICLE SPEED CONTROLCrash reported3 injured

ARRIVED AT SON'S HOME AND STOPPED IN DRIVEWAY WITH FOOT ON BRAKE WHEN VEHICLE SUDDENLY ACCELERATED UNCONTROLLABLY, SPINNING WHEELS IN GRAVEL DRIVEWAY. DRIVER SWERVED TO AVOID HITTING GARAGE AND RAN H

20121012Component: AIR BAGS: ALLEGED COUNTERFEIT AIR BAGCrash reported2 injured

MY DAUGHTER AND I WERE REAR ENDED AND OUR 2005 MERCURY GRAND MARQUIS GS AIRBAGS NEVER DEPLOYED IN SPITE OF BEING HIT THREE TIMES BY A DELIVERY DRIVER WITH A BOX TRUCK AT THE INTERSECTION OF PEMBROKE A

20080102Component: VEHICLE SPEED CONTROLCrash reported2 injured

WHILE PARKED AT THE END OF HER DRIVEWAY, WAITING FOR ONCOMING VEHICLES TO BYPASS, THE VEHICLE AUTOMATICALLY ACCELERATED, AND MADE A HALF TURN AT 40 MILES PER HOUR. THE VEHICLE, AS A RESULT, HIT A TREE

Showing the 5 most serious of 634 complaints filed with NHTSA.

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