1990 Mercury Topaz Service and Repair Manual
The 1990 Mercury Topaz 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 AWD Sedan 2-Door
- GS AWD Sedan 4-Door
- GS Sedan 2-Door
- GS Sedan 4-Door
- LS AWD Sedan 4-Door
- LS Sedan 4-Door
- LTS AWD Sedan 4-Door
- LTS Sedan 4-Door
- Sport AWD Sedan 2-Door
- Sport Sedan 2-Door
- Sport Sedan 4-Door
- XR5 AWD Sedan 2-Door
- XR5 Sedan 2-Door
Engines covered
- 2.3L 140Cu. In. l4 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
THREADED INFLATOR COMPONENTS MAY HAVE BEEN DAMAGED DURING ASSEMBLY WHICH MAY ALLOW COMPONENTS TO SEPARATE WHEN INFLATOR RECEIVES A SIGNAL TO DEPLOY THE AIR BAG.
INFLATOR COMPONENT SEPARATION ALLOWS HOT COMBUSTION GASES TO ESCAPE INTO THE PASSENGER COMPARTMENT W
REPLACE AIR BAG MODULES CONTAINING POTENTIALLY DEFECTIVE INFLATORS.
THE IGNITION SWITCH COULD EXPERIENCE AN INTERNAL SHORT CIRCUIT.
THIS CONDITION COULD CAUSE OVERHEATING, SMOKE, AND POSSIBLY FIRE IN THE STEERING COLUMN AREA OF THE
DEALERS WILL REPLACE THE IGNITION SWITCH.
SOME VEHICLES MAY EXHIBIT HEATER CORE LEAKS. *SLC
INFORMATION REGARDING TRANSMISSION FLUID USAGE CHARTS. *SLC
INFORMATION ON THE NEW FLUSH AND FILL TOOL AVAILABLE THROUGH ROTUNDA. *TT
RECOMMENDED GUIDELINES FOR TOWING BEHIND RECREATIONAL VEHICLES. *TT
INFORMATION REGARDING THE NEW TRANSMISSION COOLER FLUSHER- SERVICE TIP. *MJS
INFORMATION ON IDENTIFYING NON-APPROVED / ALTERNATE REFRIGERANTS WHICH COULD CAUSE SAFETY, AND PERFORMANCE CONCERNS IF INSTALLED IN FORD A/C SYSTEMS. *TT
SUBJECT ON A WIRE HARNESS TERMINAL REPAIR KIT AVAILABLE FOR REPAIRING ELECTRICAL WIRING HARNESSES. *TT
EXPERIENCING A WHINE / BUZZ TYPE NOISE IN THE SPEAKERS OF THE ENTERTAINMENT RADIO OR TWO-WAY RADIO ON VEHICLES WITH AN IN-TANK ELECTRIC FUEL PUMP. *TT
Showing the 8 most recent of 37 technical service bulletins on file with NHTSA.
UPON REAR END COLLISION, RIGHT PASSENGER SEAT BACK COLLAPSED DUE TO SEAT LEVER FAILING. PLEASE DESCRIBE DETAILS. TT
OWNER STATES THAT SHE WAS INVOLVED IN A CRASH WHILE TRAVELING AT 15-25MPH AND FRONT AUTOMATIC SEAT BELTS DID NOT HOLD/LATCH. ALSO, DEALER STATED THAT SAFETY CATCH WAS DEFECTIVE. *AK
WHILE DRIVING VEHICLE THE RIGHT FRONT PASSENGER'S LUGS/NUTS CAME OFF, CAUSING A CRASH. *AK
VEHICLE CAUGHT ON FIRE. FIRE STARTED IN THE STEERING COLUMN. VEHICLE EXPERIENCED THE SAME PROBLEM AS MANUFACTURER'S RECALL 7774/IGNITION SWITCH. FORD ADVISED CONSUMER THAT THIS VEHICLE WAS NOT
COPIES OF FORM O.M.B. NO. 2127-0008 SENT VIA US MAIL, AND E-MAIL TO: HTTP://WWW.NHTSA.DOT.GOV
Showing the 5 most serious of 67 complaints filed with NHTSA.
