After the wiper arm I decided to tackle the issue with my 4wd light NOT coming on. There went the day.
-replaced top VSV=no change.
-tested all 3 VSV; all checked out=no change.
-swapped hoses to the VSV’s=no change.
-removed 4H switch from dash and tested good.
-removed instrument bezels to test 4WD indicator light; tested good!
-put all that crap back=no change.
-had beer=no change.
-verified front driveline was free no matter what the push button switch was on.
-bought some vac hose, and connected it to the hard vac line below the VSV’s and blew, and then sucked=holy crap there’s a leak!
Bingo!
View attachment 1739208
View attachment 1739209