1990 Ford Mustang service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.
Built for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and use wiring diagrams and system sections to diagnose problems faster.
What’s included
- Step-by-step repair procedures and service information
- Specifications and reference data (where provided)
- Electrical coverage with wiring diagrams
- Coverage across key systems: engine, transmission, brakes, steering, suspension, HVAC, and more
Trims covered
- GT Hatchback 2-Door
- LX Convertible 2-Door
- GT Convertible 2-Door
- LX Sedan 2-Door
- LX Hatchback 2-Door
Engines covered
- 5.0L 302Cu. In. V8 GAS OHV Naturally Aspirated
- 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated
Index / Table of contents
- 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
K2 MOTOR IS RECALLING 1,921 AFTERMARKET HEADLAMPS OF VARIOUS MODELS SOLD FOR USE ON THE ABOVE LISTED VEHICLES. THESE HEADLAMPS ARE MISSING THE AMBER SIDE REFLEX REFLECTOR WHICH FA
DOPE, INC. IS RECALLING 42,540 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HE
SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HE
SOME VEHICLES MAY EXHIBIT HEATER CORE LEAKS. *SLC
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
SOME VEHICLES MAY EXHIBIT A VIBRATION THAT MAY BE HEARD OF FELT AT THE CLUTCH PEDAL BETWEEN IDLE AND 2300 RPM, AND GOES AWAY WHEN DEPRESSING THE CLUTCH AT LEAST 25MM. *TT
INFORMATION ON THE NEW FLUSH AND FILL TOOL AVAILABLE THROUGH ROTUNDA. *TT
INFORMATION REGARDING TSB 98-5A-12 (TRANSAXLE/TRANSMISSION/TRANSFER CASE-VEHICLES TOWED BEHIND RECREATIONAL VEHICLES-RECOMMENDED GUIDELINES) DOES NOT LIST TOWING INFORMATION FOR CERTAIN MODEL VEHICLES. *MJS
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
Showing the 8 most recent of 33 technical service bulletins on file with NHTSA.
CONSUMER WAS TRAVELING ABOUT 30MPH ON A FREEWAY EXIT, AS SHE WAS SLOWING DOWN FOR THE EXIT, VEHICLE SHUTDOWN WITHOUT PRIOR WARNING. LOST CONTROL AND IT WENT STRAIGHT INTO A TREE.
CONSUMER WAS TRAVELING ABOUT 30MPH ON A FREEWAY EXIT, AS SHE WAS SLOWING DOWN FOR THE EXIT, VEHICLE SHUTDOWN WITHOUT PRIOR WARNING. LOST CONTROL AND IT WENT STRAIGHT INTO A TREE.
WHILE DRIVING TURNED THE CORNER AND THE AIR BAG DEPLOYED, WHICH AT THAT TIME ATTEMPED TO APPLY THE BRAKES AND THE VEHICLE DID NOT STOP, HAD TO HIT A TREE BEFORE THE VEHICLE CAME T
Showing the 3 most serious of 119 complaints filed with NHTSA.
