Why wont my 4wheel drive work or light u on the dash its a 1989?

There could be several reasons why the 4WD system in your 1989 vehicle isn't working or the indicator light isn't illuminating. Common issues include a faulty transfer case switch, a blown fuse, or problems with the wiring or connectors. Additionally, there could be mechanical issues within the transfer case or front differential. It's best to check the relevant components and wiring for any signs of damage or wear.