1984 Mercury Grand Marquis Service and Repair Manual
The 1984 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
- Base Sedan 2-Door
- Base Sedan 4-Door
- Colony Park Wagon 4-Door
- LS Sedan 2-Door
- LS Sedan 4-Door
Engines covered
- 5.0L 302Cu. In. V8 GAS OHV Naturally Aspirated
- 5.8L 5753CC 351Cu. In. V8 GAS OHV 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
THE BOLTS THAT ATTACH THE D-SHAPED RING FOR THE SHOULDER BELT ARE INADEQUATELY SUPPORTED BY THE MATERIAL IN WHICH THEY ARE MOUNTED. THE ATTACHMENT DOES NOT COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTO
DEALERS WILL INSTALL NEW ATTACHING HARDWARE TO IMPROVE THE STRENGTH OF THE MOUNTING.
INFORMATION REGARDING TRANSMISSION FLUID USAGE CHARTS. *SLC
SUBJECT REGARDING CONTAMINATION FROM PRIOR TRANSMISSION CONCERNS OR EXCESS WEAR MAY BE TRAPPED IN THE TRANSMISSION FLUID COOLING SYSTEM. *TT
FORD MOTOR COMPANY HAS RELEASED A NEW ELECTRICAL GREASE ( F8AZ - 19G208-AA ) TO REDUCE THE POSSIBILITY OF MOISTURE CORROSION AT THE TERMINALS. *YC
A NEW SILICONE GASKET AND SEALANT. *YC
INFORMATION ON TIRE COMPANY TELEPHONE NUMBERS FOR CUSTOMER ASSISTANCE. *YC
INFORMATION ON A NEW TRANSMISSION FLUID USAGE CHART. *YC
FLUID- TRANSMISSION FLUID USAGE CHARTS. *JD
WIRING - ELECTRICAL DIODE IDENTIFICATION AND SERVICE REPLACEMENTS. *TW
Showing the 8 most recent of 12 technical service bulletins on file with NHTSA.
CONSUMER HAD THE VEHICLE IN PARK, THEN PUT THE VEHICLE IN DRIVE, AND THE VEHICLE JUST TOOK OFF, CAUSING THE CONSUMER TO RUN IN A YARD AND WENT DOWN AN ENBANKMENT AND HIT A TREE. THE INSURANCE COMPANY
ACCELERATOR STUCK WHILE ATTEMPTING TO BACK UP, CAUSING SUDDEN ACCELERATION/LOSS OF CONTROL/ACCIDENT. *SKD
VEHICLE EXPLODED INTO FLAMES WHEN HIT FROM BEHIND. *DH
DROVE 5 MILES, SHUT OFF ENGINE, RETURNED WITHIN 5 TO 6 MINUTES, FLAMES WERE COMING UP FROM UNDERHOOD IN AREA OF WINDSHIELD, FUEL INJECTED ENGINE. *AK
AFTER STARTING AUTO TO WARM IT UP THEN WALKED AWAY AND SUDDENLY IT BLEW UP AND BURNED EVERYTHING UNDER THE HOOD AND DASH. *AK
Showing the 5 most serious of 24 complaints filed with NHTSA.
