I just recently had a new compressor and hoses put on but the guy bypassed power wire to my fuse box under hood and drained my new battery overnite and compressor was on all nite and it was hot last nite when I touched it.i don't have daytime running lights but now my nitetime lites are on when switch is off in daytime could it be the relay switch to fix problem?

 

It was a bit hard to decipher your description of the lights. Could you repeat your description with some more details as to when the lights are on or off?

Could you also tell us the year of your Blazer?

 

Also what compressor was replaced?

Slow down and describe things then someone should be able to help.

 

Bring it back to whoever did the work and tell them to fix.