My 1991 Mits Montero 4WD will not get out of Wheel Lock. Help

The module is in the distibiutor on the 3.0 engine if you have the 3.5 it would be the crank sensor to the ECM with cam sensor also. Have you checked to see if the timing belt is still intact and moving the camshafts. I have also seen a lot of ecu issues that cause the same thing. But I would start with simple steps Check fuses and connections first.

Check your oil, do not run the vehicle until you have that repaired or checked. It could mean no oil is flowing through the engine, A sure ticket to a blown motor if not lubricating.

well its not security that only keeps form running , could be bad cell in battery or the starter is bad possible bad cables ? worse case engine locked upi would have the battery tested make sure cables ends are clean if ok remove starter and have tested if ok look at cables ? maybe make engine turns by hand

2001 Mits Montero 3.5, Fuel pump isn't responding. What do i do?

check the wires in the door jam that connect the door to the chassis.. where they bend evertime open and close the door sometimes cause the wires to break

it is easy to change even you can change it your just going to take off the front wheel then you will see the break panel there's a bolt holding the break pad loose it so can pull the break pad out... or more or less even a driveway mechanic can do this for less cost...

Do the 4 wheeldrive lights in the middle of the instrument cluster flash when you've selected 4 Wheel Drive?. Have you tried move forward with the transferbox lever to 4 Wheel Low on a NON-Asphalt/Tarmac surface[ie, dirt road/trail. Sometimes on a Gen 2 Pajero/Montero that hasn't had the 4 Wheel selection used in awhile, do this trick, before moving the lever back up to 4 Wheel High[with no center diff lock] seems to free up a sticking t-box. Also, make sure all your vacuum hoses for the front axle connection system are attached to their metal pipes or solenoids, esp. the main connection at the engine[your source of vacuum for the system.]

Bad 4wd position sensor located on transfer case or bad sensor located on right front axle housing for 4wd engagement position.

Do you have an exploded view of the front wheel 4WD auto free mechanism? my car is mitsubishi delica starwagon 1991 model.

I have the same problem, changing to 4 wheel drive works ok but 4WD light keep flashing. I was told that it needed a solenoid switch.