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2003 Jeep Wrangler CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT Jeep 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 2003 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 2003 Jeep Wrangler AUTOMOBILES
General Service Domestic Vehicles -> 2003-04 -> Charging System -> Caravan, Town & Country & Voyager -> Cherokee, Dakota, Full Size Pickups, Liberty, PT Cruiser & Vans, Grand Cherokee & Wrangler -> Concorde, Intrepid, LHS & 300M -> DaimlerChrysler Corp. -> Ford Motor Company -> General Motors -> Neon -> Sebring & Stratus Coupe -> Sebring & Stratus Sedan & Sebring Convertible
Vehicle: 2003 Jeep Wrangler Sahara 4.0 L6 GAS
DaimlerChrysler Corp.
Sebring & Stratus Coupe
Never use cans to charge into high pressure side of system (compressor discharge port) or into system at high temperature, as high system pressure transferred into charging may cause it to explode.
- Attach center hose from manifold gauge set to refrigerant dispensing manifold. Turn refrigerant manifold valves completely counterclockwise to open fully, remove protective caps from refrigerant manifold.
- Screw refrigerant cans into manifold. Ensure gasket is in place and in good condition. Torq...
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BRAKE SERVICE PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
Power Brake Units -> Power Brake Unit Service -> Caravan, Town & Country & Voyager -> Cherokee -> Dakota & Durango -> Full Size Pickup -> Full Size Van -> Grand Cherokee -> Hydraulic Booster -> Inline Mount -> Installation -> Liberty -> PT Cruiser -> Removal -> Replacement -> Transverse Mount -> Vacuum Booster -> Wrangler
Vehicle: 2003 Jeep Wrangler X 4.0 L6 GAS
The only serviceable power brake booster components are the vacuum hose and the check valve.. The power brake booster must be serviced as an assembly. If diagnosis indicates a power brake booster fault condition, the unit must be replaced as an assembly.
Replacement
Full Size Pickup
Vacuum Booster
- With engine stopped, pump brake pedal four or five times to deplete power booster vacuum.
- Remove brake lines from master cylinder.
- Remove nuts attaching master cylinder and valves to power brake booster unit studs, then remove master cylinder and valves as an assembly.
- Disconnect vac...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
DaimlerChrysler Corp./Jeep Light Trucks, SUVs & Vans -> Fuel Filter Replacement -> Wrangler, 1997-98 Grand Cherokee & 1997-01 Cherokee
Vehicle: 2003 Jeep Wrangler Sport 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 bee...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
DRIVESHAFT, Replace -> Front -> Rear
Vehicle: 2003 Jeep Wrangler Sahara 4.0 L6 GAS
Front
- With vehicle in neutral, position vehicle on hoist.
- Remove skid plate if equipped to gain access to propeller shaft.
- Mark a line across axle pinion flange, propeller shaft, flange yoke and transfer case for installation reference.
- Remove U-joint strap bolts at pinion shaft yoke.
- Remove transfer case yoke bolts.
- Push rear of propeller shaft forward to clear transfer case yoke.
- Remove propeller shaft from vehicle.
- Reverse procedure to install, noting the following:
- Align reference marks.
- Torque U-joint strap bolts t...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
Starter, Replace
Vehicle: 2003 Jeep Wrangler Sport 4.0 L6 GAS
- Disconnect battery ground cable.
- Raise and support vehicle.
- Remove starter motor lower mounting bolt.
- While supporting starter motor, remove starter motor upper mounting bolt.
- Lower starter motor from front of transmission housing far enough to access wiring connector retaining nut.
- Remove battery cable eyelet to solenoid battery terminal retaining nut.
- Disconnect ...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
Chrysler LLC Trucks -> All Wheel Drive (AWD) Warning Lamp ->
Vehicle: 2003 Jeep Wrangler Rubicon 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 2003 Jeep Wrangler AUTOMOBILES
Radiator, Replace
Vehicle: 2003 Jeep Wrangler Rubicon 4.0 L6 GAS
- Disconnect negative battery cable at battery.
- Remove radiator cap.
- Remove condenser lower seal from lower core support.
- Drain coolant into a suitable container.
- Remove radiator upper and lower hose clamps.
- Remove radiator hoses.
- Disconnect coolant reserve/overflow tank hose from radiator.
- Remove reservoir tank and power steering reservoir and position out of way.
- Remove four fan shroud mounting bolts. Position fan shroud back over fan blades.
- On models with automatic transmission, disconnect and plug automatic transmission fluid cooler lines.
- On all models, remove six radiator mounting ...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 Jeep Wrangler AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 Jeep Wrangler SE 2.4 L4 GAS
- Rotate or lift the belt tensioner arm, using a suitable tool to relieve tension from dr...
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COMPONENT LOCATION DIAGRAMS FOR 2003 Jeep Wrangler AUTOMOBILES
Component location diagrams for most 2003 Jeep Wrangler cars and light trucks sold in the U.S. from 1990+.
 Airbag Control Module And Passenger Airbag On/Off Switch Diagram for 2003 Jeep Wrangler SE 2.4 L4 GASComponents on diagram: |
 Underhood Component Locations Diagram for 2003 Jeep Wrangler SE 2.4 L4 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 Jeep Wrangler AUTOMOBILES
OEM drawn wiring diagrams for most 2003 Jeep Wrangler cars and light trucks sold in the U.S.
 2003 Jeep Wrangler Rubicon 4.0 L6 GAS Wiring DiagramComponents on diagram: |
 2003 Jeep Wrangler Sport 4.0 L6 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 Jeep Wrangler AUTOMOBILES
OEM TSB listings for most 2003 Jeep Wrangler cars and light trucks sold in the U.S. from 1985+.
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Document: AUTOMATIC TRANSMISSION DIAGNOSTIC TEARDOWN PROCEDURE - REVISED Vehicle: 2003 Jeep Wrangler Sahara 4.0 L6 GAS Auto Systems: |
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Document: AUTOMATIC TRANSMISSION DIAGNOSTIC TEARDOWN PROCEDURE - REVISED Vehicle: 2003 Jeep Wrangler Sahara 4.0 L6 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 Jeep Wrangler AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 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 2003 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 2003 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 2003 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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