Stupid Stereo Wiring

[FireRedTahoe]

I've been having problems with my stereo since a bit after i bought my 96 Tahoe.At first it was the back speakers in the ceiling, after I Uninstalled them I cut the wires and capped them. I went awhile without problems then one day my battery died, since then I can't get power to any stereo I put in. I've tried the stock stereo for my Blazer, the aftermarket one in my Blazer and nothing... I checked each in the blazer in and they all work! What could be my problem? I've checked both of the fuses to the radio and they are fine..

 

[lesterl]

Harness in dash should have 12v constant on Yellow, 12v Key on/run on red, and black wire should be a ground for both.....

 

[FireRedTahoe]

I looked it up and the website i looked at said its orange. After checking everything out with a ground tester, i found out i'm not getting power at the fuse box.