how do the front axle lock on a 1989 cherokee laredo it don have vacuum
control system on it do the transfer case lock the front axle if it do how do
the axle lock

atuo lock hubs or vaccum actuator on the front axle

if it has the vaccum actuator it will look like a canister on the axle with a hose or 2 connected to it

it don have no vaccum actuator on the front axle so it atuo lock hubs ok how do atuo lock hubs work

i don't know if this will help or not on my 89 jeep i have a turn knob (don't know the name) under the dash by the 4x4 handle that i turn after i put it into 4 high. do you have somethinglike that?

The factory setup uses a vacuum control system. There's a vacuum actuator io the top of the axle tube and a shifter fork housing.

If these are not there, then a previous owner swapped out your front axle. In that case the axle is always locked regardless of 2wd, 4wd or even neutral. The TC only engages the front drive shaft. There are no locking hubs unless, once again, a previous owner modified your setup.