78 short box 4x4 electrical problems please help

[Truck Norris]

Hello all, I have a 1978 Chevy 4x4 Silverado and I'm having some electrical issues. My truck was stolen and stripped back in December among items taken were my door panels and power window and power lock switches. I found switches off a 79 at the junk yard and everything worked great for a couple weeks then suddenly no windows.. I tried to figure out why they didn't have power but no luck. I then spliced the power wire from the locks into the windows and again everything worked great for a few weeks then within a few minutes driver side lock quit then passenger then both windows. And I'm not sure if its related but the blinkers are not working right now either. Please any guidance would be very appreaciated, this has been a nightmare.