99 Rodeo Automatic won't go into 4WD

My Rodeo with 105,000 miles refuses to go into 4wd. The green 4wd indicator lights blink but never go steady indicating it is engaged in 4wd. About a week ago, I began having trouble with the shifter too. It will start in park but I can't depress the button on the shifter to get it into drive. This forces me to start the car in neutral then put it in gear.

Are these related problems? or separate ones and what can I do to solve them?

Thanks

DAG

It could be range sensor needs cleaning. Also try to engage 4x4 on flat surface.
Read faqs:
http://www.isuzufaq.com/
see faq # 59

This is a tsb (Technical Service Bulletin) for your truck.1998-2004 Isuzu Rodeo (UE) and Rodeo Sport (UA)
Service Information
Use the following steps to remove and replace the Shift Lock Solenoid.
Service Procedure
1.Access the Shift Lock Solenoid by removing the Center, Front, Rear Console Assemblies, Selector Lever Knob, and Cover Assembly. Refer to the Selector Lever section in the Service Manual.
http://www.alldatapro.com/alldata/PRO~V43783344~C40419~R0~OB0~P3R0H~N/0/70910848/78536390/78536423/110737874/34853741/34860071/34861852/42063523/113746616/113396916/115193115
2.Set parking brake, move Selector Lever to lowest gear, and remove the Shift Lock Cable.
http://www.alldatapro.com/alldata/PRO~V43783344~C40419~R0~OB0~P3R0H~N/0/70910848/78536390/78536423/110737874/34853741/34860071/34861852/42063523/113746616/113396916/115193116
3.Remove the two screws securing the Shift Lock Solenoid to the Selector Lever subassembly. Disconnect the Shift Lock Solenoid 2-pin connector.
4.Disconnect the 1-40 (Rodeo) or 1-3 (Axiom) six-pin connector and slide the female connector off bracket. Remove the Terminal Position Assurance (TPA) Lock from the connector. Locate the two blue wires in position 1 and 3 on the female connector. With appropriate tool (shown above), apply light pressure upward on the connector locking tab while gently pulling on the blue wire to release.
Note</B> :Never use force to remove a terminal from a connector.
5.Insert the two blues wires from the replacement Shift Lock Solenoid into the 1-40 (Rodeo) or 1-3 (Axiom) female connector. It does not matter which blue wire is inserted into the 1 and 3 position. Gently tug the blue wires to make sure they are secure.
NOTE</B> :Discard the extra 2-pin connector sub harness included with replacement Shift Lock Solenoid P/N 8-97181-068-2.
6.Reconnect the Shift Lock Solenoid 2-pin connector and reattach the two screws securing the Shift Lock Solenoid to the selector lever subassembly.
7.Reconnect the 1-40 (Rodeo) or 1-3 (Axiom) six-pin connector and slide the female connector onto the bracket.
8.Reinstall the Selector Lever Knob, Cover Assembly, Center, Front, and Rear Console Assemblies. Refer to the Selector Lever section in the Service Manual.
9.Check Shift Lock operation:
a.With ignition key in "Lock" position, Selector lever should not move from "P" position.
b.With ignition key in "ON" position and brake pedal depressed. Selector lever can be moved out of "P" position.
c.Key can be removed only when turned to "LOCK" position and selector lever is in "P" position.

also for your 4 wheel drive you might check the Actuator or Solenoid - for theTransfer Case. this actually shifts your truck into 4 wheel and the light will continue to flash if it does not fully engage. I hope these will be helpful