1986 Mercury Marquis Service and Repair Manual
The 1986 Mercury 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 4-Door
- Base Wagon 4-Door
- Brougham Sedan 4-Door
- Brougham Wagon 4-Door
Engines covered
- 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated
- 3.8L 232Cu. In. V6 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
CERTAIN FEDERAL-MOGUL AFTERMARKET FUEL PUMPS SOLD UNDER THE BRAND NAMES OF CARTER, ACCUFLOW, NAPA, TRUFLOW, PARTS DEPO, AND PARTS MASTER, SHIPPED BETWEEN AUGUST 2006 AND JULY 2007 FOR USE ON THE VEHIC
A LEAKING FUEL PUMP COULD CREATE A VEHICLE FIRE HAZARD.
FEDERAL-MOGUL WILL NOTIFY OWNERS AND REPLACE THE DEFECTIVE FUEL PUMPS FREE OF CHARGE. THE RECALL BE
INFORMATION ON IDENTIFYING NON-APPROVED / ALTERNATE REFRIGERANTS WHICH COULD CAUSE SAFETY, AND PERFORMANCE CONCERNS IF INSTALLED IN FORD A/C SYSTEMS. *TT
WIRING - ELECTRICAL DIODE IDENTIFICATION AND SERVICE REPLACEMENTS. *TW
WINDSHIELD AND INTERIOR GLASS - FOG/FILM. *TW
TRANSAXLE - TORQUE CONVERTER REPLACEMENT GUIDELINES AND TORQUE CONVERTER/TRANSAXLE COOLING SYSTEM CLEANING PROCEDURES - SERVICE TIP. *TW
WHY ARE THE GAS TANKS ROTTING OUT WHEN YEARS AGO GAS TANKS LASTED A LIFETIME AND MORE. EITHER THE GAS HAS AN ADDATIVE THAT IS DOING IT OR THE MFGS' OF GAS TANKS ARE USING POOR QUALITY MATERIALS. TH
LEFT REAR WHEEL CAME OFF, CAUSING ACCIDENT. (OHIO STATE POLICE REPORT)
ELECTRICAL SHORT, CONTINUES TO BLOW FUSES. TT
WHILE DRIVING ON ICY PAVEMENT VEHICLE ACCELERATED WIDE OPEN FOR NO APPARENT REASON. HAD TO TURN OFF IGNITION TO STOP VEHICLE. PLEASE DESCRIBE DETAILS. TT
