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1991 Ford Bronco CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Ford REPAIR SHOPS DON'T WANT YOU TO KNOW
Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!Select Section
- 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
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 1991 Ford Bronco car and truck
repair procedures including Ford engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work
guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up &
drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install
procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c
system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix
your Ford Bronco automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1991 Ford Bronco AUTOMOBILES
A/C & Cooling System Maintenance -> Ford Motor Co. -> 1990-93 Ford Aerostar, Bronco II & Explorer & 1990-94 Ranger
Vehicle: 1991 Ford Bronco 4.9 L6 GAS
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BRAKE SERVICE PROCEDURES FOR 1991 Ford Bronco AUTOMOBILES
DISC BRAKES, FORD -> General Information -> TROUBLESHOOTING -> BRAKE RATTLE -> BRAKE ROUGHNESS OR CHATTER; PEDAL PUMPING -> CALIPER BRAKE FLUID LEAK -> EXCESSIVE PEDAL EFFORT -> EXCESSIVE PEDAL TRAVEL -> HEAVY BRAKE DRAG -> NO BRAKING EFFECT WHEN PEDAL IS DEPRESSED -> PULL, UNEVEN OR GRABBING BRAKES -> REAR BRAKES LOCKING ON APPLICATION
Vehicle: 1991 Ford Bronco 5.0 V8 GAS
EXCESSIVE PEDAL TRAVEL
- Worn brake lining.
- Shoe and lining knock back after cornering or rough road travel.
- Piston and shoe and lining assembly not properly seated or positioned.
- Air leak or insufficient fluid in system or caliper.
- Loose wheel bearing adjustment.
- Damaged or worn caliper piston seal.
- Improper booster pushrod adjustment.
- Shoe out of flat more than .005 inch.
- Rear brake automatic adjusters inoperative.
- Improperly ground rear brake shoe and lining assemblies.
BRAKE ROUGHNESS OR CHATTER; PEDAL PUMPING
- Excessive lateral runout of rotor.
- Rotor excessively out of parallel.
EXCESSIVE P...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Ford Bronco AUTOMOBILES
Ford Motor Co. Light Trucks, SUVs & Vans -> Fuel Filter Replacement -> Except Diesel Engines & Villager
Vehicle: 1991 Ford Bronco 5.0 V8 GAS
The fuel system remains under high pressure even when the engine is not running. This residual pressure must be relieved before servicing the fuel system. To avoid injury or fire, release pressure from the fuel system before disconnecting any fuel line.
The fuel system pressure must be relieved prior to disconnecting fuel lines to prevent accidental spray of fuel.
After the battery has been disconnected and reconnected, some abnormal driveability symptoms may occur. The vehicle may need to be driven 10 miles or more while it relearns its adaptive strategy.
On model...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Ford Bronco AUTOMOBILES
DRIVESHAFT U-JOINT, Replace -> Assemble -> Disassemble -> Double Cardan -> Single Cardan, Flange Yoke -> Single Cardan, Slip Yoke
Vehicle: 1991 Ford Bronco 5.0 V8 GAS
Single Cardan, Slip Yoke
Disassemble
Do not, under any circumstance, clamp the shaft in the jaws of a vise or similar holding fixture. Denting or localizing fracture can result, causing shaft failure during vehicle operation. Place the shaft on a suitable workbench. Do not damage the tube. If components are not marked and installed incorrectly, driveline imbalance can occur.
- Index-mark the shaft components.
- Remove and discard all four snap rings.
- Clamp bearing cup removal tool No. 205-086 or equivalent in a vise.
- If necessary, use a pair of pliers to remove a bearing cup t...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Ford Bronco AUTOMOBILES
Starter, Replace
Vehicle: 1991 Ford Bronco 5.0 V8 GAS
- Disconnect battery ground cable.
- Raise and support vehicle, if required.
- Disconnect electrical connector or solenoid relay wire from starter motor.
- Remove starter motor attachi...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Ford Bronco AUTOMOBILES
Ford Motor Co. Trucks -> Check Engine Lamp -> 1990-91 EEC-IV
Vehicle: 1991 Ford Bronco 4.9 L6 GAS
This lamp will light when the ignition is turned On. After engine is started the lamp should go off, unless a problem has been detected by the EEC-IV system. After diagnosis and repair, the Check Engine/MIL lamp will automatically reset when stored codes are cleared from EEC-IV system memory. After diagnosis and repair, EEC-IV memory may be cleared of stored codes as follows:
- With ignition turned Off, connect a jumper wire between Self Test and Self Test Input (STI) connectors.
- On Aerostar, the Self Test and STI connectors are gray in color and are located on lefthand fender apron...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Ford Bronco AUTOMOBILES
Coolant Hose, Replace -> Lower -> Upper
Vehicle: 1991 Ford Bronco 4.9 L6 GAS
Lower
- Drain cooling system into a suitable container.
- Reposition hose clamp at radiator outlet and remove hose.
- Reposition hose clamp at water pump and remove hose.
- Remove hose from vehicle.
- Reverse procedure to install.
Upper
- Drain cooling system into a s...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1991 Ford Bronco AUTOMOBILES
Serpentine Drive Belt, Replace -> Automatic Tension -> Manual Tension
Vehicle: 1991 Ford Bronco 5.0 V8 GAS
Automatic Tension
- Install suitable 5/16 inch closed end wrench on tensioner pulley bolt, then lift tensioner arm away from belt. Do not use socket and ratchet.
- Remove belt, slowly release tensioner. Do not allow tensioner to snap back, as damage may result.
- Reverse procedure to install.
Manual Tension
- Loosen accessory adjustment bolt and pivot bolt.
- Remove belt.
- Reverse procedure to install, adjust belt tension as follows:
- Lo...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Ford Bronco AUTOMOBILES
Component location diagrams for most 1991 Ford Bronco cars and light trucks sold in the U.S. from 1990+.
 RH Front Of Engine Compartment Diagram for 1991 Ford Bronco 5.8 V8 GASComponents on diagram: |
 Engine Compartment Components Diagram for 1991 Ford Bronco 5.0 V8 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1991 Ford Bronco AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Ford Bronco cars and light trucks sold in the U.S.
 1991 Ford Bronco 5.8 V8 GAS Wiring DiagramComponents on diagram: |
 1991 Ford Bronco 5.0 V8 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Ford Bronco AUTOMOBILES
OEM TSB listings for most 1991 Ford Bronco cars and light trucks sold in the U.S. from 1985+.
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Document: MERCON ATF IS BEING REPLACED BY MERCON V AS A SERVICE FLUID FOR SOME MANUAL TRANSMISSIONS Vehicle: 1991 Ford Bronco 5.0 V8 GAS Auto Systems: |
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Document: TRANSMISSION - 4R100/E40D - TORQUE CONVERTER ACCESS EXTERNAL DUST PLUG MAY BECOME DISLODGED Vehicle: 1991 Ford Bronco 5.0 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Ford Bronco AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Ford Bronco 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 1991 Ford Bronco 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 1991 Ford Bronco 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 1991 Ford Bronco 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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