4WD problems

[High desert LJ78]

I just imported (to the USA) a 1991 LJ78 Prado and now that the snow has hit can't make the 4WD work. I get no response from the hub lock or 4H buttons on the dash. I read that the electric hubs on these are unreliable, so I followed directions on Youtube and put them in permanent lock. I can shift into 4L with no problem, but I don't get any action out of my front wheels. I have tried just about every combination of button/lever I can find and don't get any results. Anybody have any ideas? Thanks, Brian

 

[Ako]

Remove the electronic hubs and install some manual Aisin ones (OEM supplier).

http://aisinaftermarket.com/uploads/FreeWheelHubBrochureComp.pdf

 

[Ben]

Check the vacuum hoses and solenoid mounted on the firewall. You should here them click when you press the 4wd button.

If they are clicking, follow the 2 hoses down to the actuator on the front of the transfer case next to the front prop/drive shaft and make sure they aren't damaged and are stil attached.