These are the diagrams that Autozone has for the 1999 4.3L Blazer 4x4.
SOURCE: i need a vacuum routing
you will need to find a chiltons TOTAL CAR CARE repair manual total car care will be on the binder of the book it shows you all wireing and Vacum diagrams for the make modle and year that you buy the book for.
SOURCE: Dodge 4x4 Doesn't Engage
It's probably the actuator located on the front axle on the passenger side. Also, check all your vacuum lines to make sure there's no broken or leaking lines.
SOURCE: i need a connection diagram for a chev blazer
The Vacuum line to the 4wd actuator from under the battery try runs along the passenger side frame to the vacuum harness that is connected to the vacuum switch on top of the transfer case, driver's side.
The 4wd vacuum switch on top of the transfer case (driver's side) will have three vacuum line, one to the actuator under the battery try, one to vent out the vacuum, and the vacuum line it self which runs up towards the firewall making it's way to the vacuum canister on the drivers fender by the brake booster.
Hope this helps your and thank you for using fixya.
http://i11.photobucket.com/albums/a187/swartlkk/general%20automotive/94_vac_overall.gif
http://i11.photobucket.com/albums/a187/swartlkk/general%20automotive/94_4wd1.gif
Testimonial: "The best explanation I could find for the vacuum system operating the 4wd on my Blazer"
SOURCE: I need the vacuum line diagram for a 1985 s 10
This vacuum diagram is for a 2.8L federal spec vehicle with manual transmission
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This is all I've got.Hope this helps?
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