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1991 Jeep Wrangler CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Jeep REPAIR SHOPS DON'T WANT YOU TO KNOW
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- 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 Jeep Wrangler car and truck
repair procedures including Jeep 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 Jeep Wrangler automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 1991 Jeep Wrangler AUTOMOBILES
A/C & Cooling System Maintenance -> DaimlerChrysler Corp. -> Jeep
Vehicle: 1991 Jeep Wrangler Islander 2.5 L4 GAS
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BRAKE SERVICE PROCEDURES FOR 1991 Jeep Wrangler AUTOMOBILES
HYDRAULIC BRAKE SYSTEMS, CHRYSLER CORP. -> BLEEDING MASTER CYLINDER
Vehicle: 1991 Jeep Wrangler Renegade 4.0 L6 GAS
This procedure can be performed with master cylinder on or off vehicle.
- Disconnect brake lines at master cylinder, if necessary.
- Connect suitable lengths of brake lines to master cylinder and immerse other ends of lines in master cylinder reservoirs.
- Apply master cylinder pushrod or brake pedal with full strokes until air bubbles have disap...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 1991 Jeep Wrangler AUTOMOBILES
DaimlerChrysler Corp./Jeep Light Trucks, SUVs & Vans -> Fuel Filter Replacement -> 1993-96 Grand Cherokee, 1984-96 Cherokee, 1987-95 Wrangler, 1993 Grand Wagoneer, 1986-92 Comanche & 1984-89 Wagoneer w/Gasoline Engine
Vehicle: 1991 Jeep Wrangler Renegade 4.0 L6 GAS
Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.
Prior to disconnecting fuel lines, the fuel system pressure must be relieved 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 while the vehicle rele...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 1991 Jeep Wrangler AUTOMOBILES
DRIVESHAFT U-JOINT, Replace
Vehicle: 1991 Jeep Wrangler Renegade 4.0 L6 GAS
Clamp only the narrow forged portion of the yoke in the vise. Failure to heed caution may result in damage.
- Remove axle shaft.
- Remove bearing cap retaining snap rings. Saturate the bearing caps with penetrating oil prior to removal.
- Place socket (receiver) with inside diameter larger than bearing cap against yoke and perimeter of bearing cap to be removed.
- Pla...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 1991 Jeep Wrangler AUTOMOBILES
Alternator, Replace
Vehicle: 1991 Jeep Wrangler Sahara 4.0 L6 GAS
- Disconnect battery ground cable.
- On models equipped with air conditioning, remove air conditioning drive belt.
- Remove bolts retaining air conditioning compressor mounting bracket.
- Without disconnecting air conditioning refrigerant lines, position air conditioning compressor to allow alternator removal.
- On all models, remove alternator drive belt.
- Remove alternato...
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MAINTENANCE LAMP RESET PROCEDURES FOR 1991 Jeep Wrangler AUTOMOBILES
Chrysler LLC Trucks -> All Wheel Drive (AWD) Warning Lamp ->
Vehicle: 1991 Jeep Wrangler Islander 4.0 L6 GAS
This light monitors the AWD system. The light will turn on for a bulb check when the ignition switch is turned to the on position and may stay on for as long as three seconds. When the lamp is illuminated solid here is an A...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 1991 Jeep Wrangler AUTOMOBILES
Radiator, Replace
Vehicle: 1991 Jeep Wrangler Islander 2.5 L4 GAS
- Drain cooling system into a suitable container.
- Remove surge tank hose/pipe.
- Remove radiator inlet hose.
- Remove radiator outlet hose.
- Remove alignment dowel E-clip from radiator lower mounting bracket.
- Disconnect coolant reserve bottle hose from radiator.
- Remove cooling fan shroud.
- On models with automatic transmissions, disconnect transmission oil cooler lines from radiat...
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SERPENTINE BELT SERVICE PROCEDURES FOR 1991 Jeep Wrangler AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 1991 Jeep Wrangler 2.5 L4 GAS
Belt tension is adjusted at the power steering pump or idler pulley if not equipped with power steering.
- Disconnect battery ground cable.
- Loosen power steeri...
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COMPONENT LOCATION DIAGRAMS FOR 1991 Jeep Wrangler AUTOMOBILES
Component location diagrams for most 1991 Jeep Wrangler cars and light trucks sold in the U.S. from 1990+.
 Front End Splices Diagram for 1991 Jeep Wrangler Sahara 2.5 L4 GASComponents on diagram: |
 Front End Splices Diagram for 1991 Jeep Wrangler Sahara 4.0 L6 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 1991 Jeep Wrangler AUTOMOBILES
OEM drawn wiring diagrams for most 1991 Jeep Wrangler cars and light trucks sold in the U.S.
 1991 Jeep Wrangler Islander 4.0 L6 GAS Wiring DiagramComponents on diagram: |
 1991 Jeep Wrangler S 2.5 L4 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 1991 Jeep Wrangler AUTOMOBILES
OEM TSB listings for most 1991 Jeep Wrangler cars and light trucks sold in the U.S. from 1985+.
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Document: AUTOMATIC TRANSMISSION FLUID USAGE - ATF+4 (TYPE 9602) - REVISED Vehicle: 1991 Jeep Wrangler 2.5 L4 GAS Auto Systems: |
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Document: WINDSHIELD WIPER BLADE / ELEMENT MAINTENANCE Vehicle: 1991 Jeep Wrangler 2.5 L4 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 1991 Jeep Wrangler AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 1991 Jeep Wrangler 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 Jeep Wrangler 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 Jeep Wrangler 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 Jeep Wrangler 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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