Need Transfer Case parts

[88K1500inAZ]

I own a 88 Chevrolet K1500

I need a Transfer Case part (Per Chiltons Manual, a Indicator Lamp Switch)

My 4x4 light is on all the time, I have changed out the 4wd Actuator,did not fix my problem.

Now to try the (Indicator Lamp Switch), hopefully this will fix

Any other ideas, I am all ears..

Thanks

Clint