Hi

40cm of snow today and my 4wd sytem not work properly.

4wd work just few second,i can "feel" it was on 4wd,the light turn on but after 10-30sec the light turn off and no more 4wd.I had thinking about vacuum but i can't find a "good" vacuum diagram .

if someone have a diagram or a pics of the 4wd vacuum it's will be appreciate

4runner sr5 1991 22re 4wd

thanks for any help.