My Truck is a 95.5 Tacoma extra cab with v6, 4 wheel drive, and manual transmission.

My problem is the truck no longer goes into 4 wheel drive.

Light does not light up on dash when selector is put into 4 wheel high or low and more importantly no power is going to the front wheels.

Can someone give me steps to diagnose whether it is an electrical
problem, a transfer case problem, or if the hubs are shot?

Thanks in advance for any advice.

Regards,

D