I need some help figuring out where the blue/green/yellow vacuum lines go to and how I find replacements.

 

those are your 4x4 actuation vacuum lines, the red one supplys vacuum to the T/C switch, the blue is a vent with a check valve at the end, by the blower motor, the green and yellow go down to the vacuum disco motor on the axle. the white one comes from the disco motor and closes the switch located by the blower motor and turns on the 4x4 light on the dash.

 

Here is the schematic.

 

I have the dealer part numbers somewhere if you want to go new.

 

hey i want to replace those lines on my 89 there all cracked. you say you know the parts numbers could i get them? i would greatly apprciate it thanks!