bought blazer and the last owner replaced a modular, as the gauges were not working (fuel, temp, indicator for PRND32) but the after replacing and putting the dash back together the gauges still do not work, as well the 4x4 buttons don't work either, are these issues related?

 

turns out I need to take truck in and have tccm programmed for my 4x4 buttons to work currently using jump wire to engage still haven't figured out dash cluster as I have no windshield washer fluid sprayer either

 

TCCM is plug & play, can not be programmed. Have you checked all fuses, with a test light, in both fuse panels?

 

I know of fuse panel by drivers door where is the other fuse panel?

 

Under the hood, left inner fender, between the air filter housing and the ABS unit. Black plastic cover with a thumb screw on top, can't miss it