How do you service the 4 wd on 96 jeep grand cherokee?

SOURCE: 96 jeep Grand Cherokee tailgate will not open

This is kind of tricky. OK let's start, you have to crawl into the rear hatch area from the inside of the car. You'll have to pull the rear panel off the hatch, a screwdriver between the panel and hatch near the window will work. There might be 2 screws on the panel you could take out. The trick is to pull the panel far away enough to stick your arm down towards the latch and release it by hand. We did this at the dealer all the time.

SOURCE: Service 4 wheel drive

The service 4 wheel drive light comes on because there's a problem. The biggest causes of this I've seen are a software glitch in the final drive control module which the dealer can fix by reprogramming and the other is usually the electric actuator on the front axle housing. The only light that comes on by a timer is the one that says, "perform service" in your overhead console or odometer.

ZJ Limited

• 17989 Answers
• Posted on Jul 15, 2009

SOURCE: computer light says service 4 wheel drive switch

According to the mechanic who works on my 94 Jeep it's one of three things:
1) Corrosion on the connector to the switch (which is located on top of the transfer case).
2) A bad switch. Part cost about $22.00 or,
3) A bad console display. he says they have had a fair number of console display units fail.

SOURCE: 1996 jeep grand cherokee limited v8 5.2, A/C instructions?

1. Disconnect battery. This must be done to prevent accidental airbag deployment.
2. Using on A/C recovery unit, remove all R-134a refrigerant from the A/C system. See: Service and Repair
3. Remove the shift knob by pulling sharply upward.
4. Place the transfer case in low range. Pry the shift indicator bezel out of the console using a trim stick.
5. Apply the parking brake and place the transfer case in neutral. Remove the parking brake trim insert. Remove the console attaching screws. Lift the console up and disconnect the 4WD indicator lamp hamess. Remove the console.
6. Remove the passenger side knee blocker. Remove the single end screw. Remove the screws below the glove box. Remove the screw at the courtesy lamp. Remove the ash receiver and the screws behind it. Remove the instrument panel armature screw behind the ash receiver. Open the glove box and remove the screws behind it. Lower the panel and disconnect the lamp harnesses. For additional instrument panel service procedures to complete steps 6 thru 25, refer to Instrument Panel, Gauges and Warning Indicators/ Instrument Cluster / Carrier/ Service and Repair/ Procedures. See: Instrument Panel, Gauges and Warning Indicators\Instrument Cluster / Carrier\Service and Repair
7. Remove the pod switch bezels on both sides of the steering column with a trim stick.
8. Remove the drive side knee blocker. Remove the end screw and screws located at the bottom of the knee blocker.
9. Remove the cowl top trim panel by prying it up with a trim stick. Remove the solar sensor if equipped.
10. Remove the "A" post trim panels.
11. Remove the remove the bolts that attach the lower instrument panel reinforcement to the instrument panel armature and remove the reinforcement.
12. Disconnect the park lamp switch.
13. Pull back the carpet at the transmission tunnel from the base of the instrument panel center bezel. Remove the nuts from the upper studs and bolts through the floor that secure the instrument panel center bracket.
14. Remove the bolts that secure the instrument panel center bracket to the drivers side of the transmission tunnel.
15. Remove the screws securing the Vehicle Information Center and remove it. Remove the screw fastening the mounting bracket.
16. Unplug the vacuum harness connector or vent tube on ATC equipped vehicles and the wire harness located under the passenger side of the instrument panel.
17. Remove the screws holding the passenger side kick panel, along with the screw from the kick panel shroud.
18. Unplug the antenna cable near the right cowl side panel.
19. Unplug the instrument panel wire harness connectors from the junction block at the right cowl side panel.
20. Remove the bolts that secure the instrument panel armature to the windshield fence.
21. Remove the nuts that secure the top if the instrument panel armature to the windshield fence.
22. Remove the bolts that secure the ends of the instrument panel to the cowl side panel.
23. Remove the nuts that secure the steering column to the brake pedal support and lower the steering column.
24. Remove the bolts that secure the instrument panel armature to the brake pedal support.
25. Place a protective cover on the seats. Lift the instrument panel off the windshield fence studs and maneuver the instrument panel out and lower it onto the seats.
26. Disconnect the refrigerant lines from the evaporator tubes. Make sure to install plugs or tape the ends of the lines and fittings to ensure that excessive amounts of moisture do not contaminate the A/C system.
27. Remove the vacuum line at the tee from the main vacuum supply harness. This line runs through the body with the upper refrigerant line.
28. Disconnect the heater hoses from the heater core and clamp the ends closed to prevent coolant loss. See: Heater Core\Service and Repair
29. Remove the coolant overflow bottle.
30. Remove the Powertrain Control Module with connectors intact and set aside.
31. Remove the heater A/C housing mounting nuts from the studs on the engine compartment side of the dash.
32. Remove the heater A/C housing from the vehicle.
33. To Install the components, reverse the procedure stated above. Torque Specifications: Instrument panel center bracket to floor transmission tunnel fastener: 28 Nm (250 in. lbs.) Instrument panel to windshield fence bolts and nuts: 12 Nm (105 in. lbs.) Instrument panel to cowl side inner panel bolts: 12 Nm (105 in. lbs.) Instrument panel to steering column support bolts: 12 Nm (105 in. lbs.)

Greg Bernett

• 2993 Answers
• Posted on Dec 01, 2009

SOURCE: 1998 Jeep Grand Cherokee Laredo 4.oL I got a code po113

Trouble Code: P0113 (4.0L L6 VIN S Auto)
IAT Sensor Circuit High Input Print this code data Number of Trips to Set Code: 1
OBD II Monitor Type: CCM Details
Indicators: MIL Details

• CCM Details

• IAT Sensor signal circuit shorted to VREF (5v)
  
• IAT Sensor signal circuit is open, or the ground circuit is open
  
• IAT Sensor is damaged or it has failed (an internal open circuit)
  
• PCM has failed