front end won't engage

[boxer]

96 explore with cotrol trac 4wd and i know that the xcase is engageing cause the front drive shaft is under perssure when i get under the truck and check any answers would be helpful thanks i was also wondering if the vacumes lines on the front end should have pressure on them when it is in 4wd

 

[Blee1099]

You don't have hubs.. You have live cv axles.. I suspect there's a problem with your xfer case, especially if your 4WD lights flashed.. Try cleaning the shift motor and see if that helps.

 

[JDraper]

You may also want to look at the front axle disconnect. On the '96's, there is a vacuum module that locks and unlocks the right inner front axle shaft from the outer front axle shaft. If there is a vacuum leak, or the module is broken/jammed, it won't engage and the lights flash. Have someone watch your truck when you put it in 4wd and roll forward. If the front driveshaft is turning, I'd look for a problem in the vacuum module, if it's not turning, take Blee1099's advice and look into xfer case problems.

 

[boxer]

i think it might be the vacume moudle i was wondering if there is any way to check that and if it could possible be somthing else that engages the front end