1989 Chevy S10 Blazer, 4.3L V6. 4wd not working. Console light shows 4wd engaged, but it's not engaged. Have been told it's ikely a vacuum problem. Where can I find vacuum routing diagram for the 4wd...and...where is 'most likely' place within the vacuum system to start looking for the rotted/ripped/torn/etc vacuum line? Thank you!
Under the battery is where you need to check first,then follow it down around the right front wheel well,
Under neath the middle of your truck where the transmission is located there should be a metal plate if not then skip that part. Just fill above the transmission and you should fill a three way plastic chip holding all 3 hoses togather. rotate the hoses to where they are not crimped. Everything on these trucks are vaccume so one one hose clamps the rest do. And this is what happen to mine after I rebuilt my transmission.
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