PIR HC-SR501 and TIP122 - TIP 127 heating problem
The resistor below TIP127 is miswired, instead of acting as a current limiter from 12V to the emitter of TIP127, it's a a (non-functional) shunt from 12V to the base of TIP127, as a result both transistors short the 12V load. 

You need to place it in series from 12V to the emitter terminal of the TIP127.

With 2200 ohms and 12V you have about 5mA of current through your indicator LED.