1990 Mercury Cougar Service and Repair Manual

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Factory-Grade Data

The 1990 Mercury Cougar 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

  • LS Sedan 2-Door
  • XR-7 Sedan 2-Door

Engines covered

  • 3.8L 232Cu. In. V6 GAS OHV Naturally Aspirated
  • 3.8L 232Cu. In. V6 GAS OHV Supercharged

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

1990 Mercury Cougar Recalls & Complaints

NHTSA #96V07100025/04/1996Component: ELECTRICAL SYSTEM:IGNITION

THE IGNITION SWITCH COULD EXPERIENCE AN INTERNAL SHORT CIRCUIT.

Consequence

THIS CONDITION COULD CAUSE OVERHEATING, SMOKE, AND POSSIBLY FIRE IN THE STEERING COLUMN AREA OF THE

Remedy

DEALERS WILL REPLACE THE IGNITION SWITCH.

NHTSA #90V02600012/02/1990Component: ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES

BATTERY TO STARTER CABLES ARE LONGER THAN SPECIFIED; EXCESSIVE CABLE LENGTH COULD CONTACT ENGINE DAMPER PULLEY.

Consequence

CABLE PROTECTIVE COVERING AND INSULATION COULD WEAR THROUGH AND CAUSE A DIRECT SHORT TO GROUND, RESU

Remedy

REPLACE BATTERY TO STARTER CABLE WITH CORRECT LENGTH CABLE.

NHTSA #91V07600006/05/1991Component: VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR

THE NUTS WHICH HOLD WINDSHIELD WIPER MOTOR TO THE WIPER MODULE MAY NOT HAVE BEEN SUFFICIENTLY TIGHTENED AND MAY LOOSEN OR COME OFF. THIS CAUSES CHANGED WIPER PATTERNS, OR THE WIPERS MAY JAM IF TWO OF

Consequence

CHANGES IN THE WIPER PATTERN OR JAMMING OF THE WIPERSWOULD RESULT IN REDUCED DRIVER VISIBILTY IN INC

Remedy

APPLY TORQUE RETENTION MATERIAL TO WIPER MOTOR STUDS AND NUTS AND RETORQUE.

TSB #623944

SOME VEHICLES MAY EXHIBIT HEATER CORE LEAKS. *SLC

TSB #623988

INFORMATION REGARDING TRANSMISSION FLUID USAGE CHARTS. *SLC

TSB #618546

SUBJECT REGARDING CLIMATE CONTROL - EATC - BLOWER MOTOR CONTROL SERVICE TIPS. *JB

TSB #616522

SUBJECT REGARDING CONTAMINATION FROM PRIOR TRANSMISSION CONCERNS OR EXCESS WEAR MAY BE TRAPPED IN THE TRANSMISSION FLUID COOLING SYSTEM. *TT

TSB #608431

INFORMATION ON THE NEW FLUSH AND FILL TOOL AVAILABLE THROUGH ROTUNDA. *TT

TSB #612203

INFORMATION REGARDING THE NEW TRANSMISSION COOLER FLUSHER- SERVICE TIP. *MJS

TSB #6090087

INFORMATION ON IDENTIFYING NON-APPROVED / ALTERNATE REFRIGERANTS WHICH COULD CAUSE SAFETY, AND PERFORMANCE CONCERNS IF INSTALLED IN FORD A/C SYSTEMS. *TT

TSB #6089681

SUBJECT ON A WIRE HARNESS TERMINAL REPAIR KIT AVAILABLE FOR REPAIRING ELECTRICAL WIRING HARNESSES. *TT

Showing the 8 most recent of 33 technical service bulletins on file with NHTSA.

20100420Component: VEHICLE SPEED CONTROLCrash reported1 injured

THE CONSUMER PRESSED ON THE ACCELERATOR AND ACCELERATED WAY TOO FAST AND HE BOLTED FORWARD STRIKING A CONCRETE BARRIER. *DT CONSUMER SENT ADDITIONAL LETTER REGARDING RESULTS FROM INCIDENT. *TGW 04/06/

19960815Component: ENGINE AND ENGINE COOLING:ENGINECrash reported1 injured

DRIVER ENTERED VEHICLE, PUT ON LAP/SHOULDER BELT, PUT VEHICLE IN DRIVE POSITION, SUDDENLY VEHICLE ACCELERATED AND TOOK OFF, TRIED TO APPLY BRAKES, WHICH DID NOT WORK, DRIVER STEERED VEHICLE TOWARDS A

19960815Component: VEHICLE SPEED CONTROLCrash reported1 injured

DRIVER ENTERED VEHICLE, PUT ON LAP/SHOULDER BELT, PUT VEHICLE IN DRIVE POSITION, SUDDENLY VEHICLE ACCELERATED AND TOOK OFF, TRIED TO APPLY BRAKES, WHICH DID NOT WORK, DRIVER STEERED VEHICLE TOWARDS A

19960815Component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTSCrash reported1 injured

DRIVER ENTERED VEHICLE, PUT ON LAP/SHOULDER BELT, PUT VEHICLE IN DRIVE POSITION, SUDDENLY VEHICLE ACCELERATED AND TOOK OFF, TRIED TO APPLY BRAKES, WHICH DID NOT WORK, DRIVER STEERED VEHICLE TOWARDS A

19960119Component: SEAT BELTS:FRONT:WEBBINGCrash reported1 injured

THE SEAT BELTS DID NOT HOLD THE DRIVER PROPERLY IN A REAR END ACCIDENT.PLEASE DESCRIBE. TT

Showing the 5 most serious of 104 complaints filed with NHTSA.

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