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1990 Ford Thunderbird CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Ford REPAIR SHOPS DON'T WANT YOU TO KNOW
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- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service

A/C & HEATER SERVICE PROCEDURES FOR 1990 Ford Thunderbird AUTOMOBILES
A/C & Cooling System Maintenance -> Ford Motor Co. -> 1990-2002 Ford Thunderbird & Mercury Cougar
Vehicle: 1990 Ford Thunderbird 3.8 V6 GAS
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BRAKE SERVICE PROCEDURES FOR 1990 Ford Thunderbird AUTOMOBILES
POWER BRAKES, FORD MOTOR CO. -> SYSTEM DESCRIPTION
Vehicle: 1990 Ford Thunderbird LX 3.8 V6 GAS
The vacuum assist diaphragm assembly multiplies the force exerted on the master cylinder piston in order to increase the hydraulic pressure delivered to the wheel cylinders while decreasing the effort necessary to obtain acceptable stopping performance.
Vacuum assist units get their energy by opposing engine vacuum to atmospheric pressure. A piston, cylinder and flexible diaphragm utilize this energy to provide brake assistance. The diaphragm is balanced with engine vacuum until the brake pedal is de...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1990 Ford Thunderbird AUTOMOBILES
Ford Motor Co. Passenger Cars -> Fuel Filter Scheduled Maintenance -> 1980-97 Cougar, XR-7 & Thunderbird -> Normal Service -> Severe Service
Vehicle: 1990 Ford Thunderbird SC 3.8 V6 GAS
Normal Service
Se...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1990 Ford Thunderbird AUTOMOBILES
DRIVESHAFT U-JOINT, Replace -> Assemble -> Disassemble
Vehicle: 1990 Ford Thunderbird 3.8 V6 GAS
Disassemble
Do not clamp driveshaft in jaws of a vice or a similar holding fixture.
- Place driveshaft on a suitable workbench.
- Mark positions of driveshaft components relative to driveshaft tube. This ensures all components are reassembled in same relationship to maintain correct balance.
- Index driveshaft and driveshaft components.
- Clamp U-Joint Tool in a vise.
- Remove snap rings.
- If bearing cup cannot be pressed all way out, remove it with vise grips.
- Remove driveshaft slip-yoke.
- Position driveshaft in U-Joint Tool.
- Press out a bearing cup.
- Rotate driveshaft 180 degrees.
- Press on...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1990 Ford Thunderbird AUTOMOBILES
Starter, Replace
Vehicle: 1990 Ford Thunderbird 3.8 V6 GAS
- Disconnect battery ground cable.
- Raise and support vehicle.
- Disconnect starter cable and relay connector from starter solenoid.
- Remove starter motor mounting bolt...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1990 Ford Thunderbird AUTOMOBILES
Ford Motor Co. Cars -> Electronic Throttle Control ->
Vehicle: 1990 Ford Thunderbird LX 3.8 V6 GAS
Electronic throttle displays when the system has malfunctioned and the engine has defaulted to a limp-home operation. On vehicles equipped with ...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1990 Ford Thunderbird AUTOMOBILES
Heater Hose, Replace -> Inlet -> Outlet
Vehicle: 1990 Ford Thunderbird 3.8 V6 GAS
Inlet
- Drain coolant into a suitable container.
- Loosen hose clamp connecting hose to heater core inlet tube.
- Loosen hose clamp connecting hose to engine.
- Remove hose from vehicle.
- Reverse procedure to...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1990 Ford Thunderbird AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1990 Ford Thunderbird LX 3.8 V6 GAS
- Rotate automatic tensioner away from belt.
- Remove old belt from pulleys.
- Install new belt over pulleys.
- Ensure all V-groo...
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COMPONENT LOCATION DIAGRAMS FOR 1990 Ford Thunderbird AUTOMOBILES
Component location diagrams for most 1990 Ford Thunderbird cars and light trucks sold in the U.S. from 1990+.
![]() Components on diagram: |
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WIRING DIAGRAMS FOR 1990 Ford Thunderbird AUTOMOBILES
OEM drawn wiring diagrams for most 1990 Ford Thunderbird cars and light trucks sold in the U.S.
![]() Components on diagram: |
![]() Components on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1990 Ford Thunderbird AUTOMOBILES
OEM TSB listings for most 1990 Ford Thunderbird cars and light trucks sold in the U.S. from 1985+.
Document: MERCON ATF IS BEING REPLACED BY MERCON V AS A SERVICE FLUID FOR SOME MANUAL TRANSMISSIONS Vehicle: 1990 Ford Thunderbird 3.8 V6 GAS Auto Systems: |
Document: MERCON ATF IS BRING REPLACED BY MERCON V ATF AS A SERVICE FLUID Vehicle: 1990 Ford Thunderbird 3.8 V6 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1990 Ford Thunderbird AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1990 Ford Thunderbird cars and light trucks sold in the U.S. and Canada from 1970+.
- Brake caliper mounting bolt torque
- Brake drum runout, machining, & discard specs
- Minimum brake lining thickness.
- Brake rotor runout, parallelism, machining, discard, & finish specs
A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most 1990 Ford Thunderbird cars and light trucks sold in the U.S. and Canada from 1980+.
- Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap
COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.
PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules
QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most 1990 Ford Thunderbird cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.
- Automatic transmission/transaxles capacities, lubricant recommendations
- Differential/final drive capacities, lube recommendations, grades, & viscosities
- Final drive fill & drain plug torques
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
- Number of lubrication fittings & plugs
- Power steering, brake, & clutch fluid recommendations
- Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
- Severe service maintenance & interval recommendations
- Tire sizes, wheel nut/bolt torque, pressures & rim sizes
- Transfer case capacities, lube recommendations, grades, & viscosities
TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most 1990 Ford Thunderbird cars and light trucks sold in the U.S. and Canada from 1980+
- Airflow sensor electrical specifications
- Tensioning specifications for systems with automatic tensioners
- Barometric pressure sensor specs
- Battery group number and cranking performance
- Crankshaft & camshaft position sensor resistance
- Engine compression pressures
- Coolant temperature sensor specs
- Computer advance.
- Diesel fuel temperature sensor resistance.
- Distributor advance specifications
- Ignition pickup coil resistance
- Exhaust gas recirculation temperature sensor resistance
- Engine fastener torque values
- Firing order diagrams
- Fuel system pressures
- Generator (alternator) specs
- Intake air temperature sensor specs
- Ignition coil specifications
- Fuel injector resistance
- Engine idle speeds
- Knock sensor resistance
- Manifold absolute pressure sensor specs
- Mixture control solenoid resistance
- Voltage regulator specs
- Spark plug applications & gaps
- Starter motor electrical specs.
- Tensioning specifications for systems without automatic tensioners
- Throttle body temperature sensor resistance
- Ignition timing in degrees at rpm
- Transmission oil temperature sensor resistance
- Throttle position sensor specs
- Vacuum sensor valve specs
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