Battery keeps draining overnight?

[undrboost]

ok i keep having this problem everytime my car sits overnight the battery is completly dead in the morning. so i took off the neg battery cable and hooked a test light in between the cable and the post, and i do have a draw. so after checking all the fuses no luck until i was sitting in my car and i hear clicking noise behind the dash. so i pull everything out of the way and one of the relays is clicking. So when i disconnect the relay i no longer have a draw with that said i only see 2 relays behind the radio and the one clicking is the one on the right so i wrote the numbers done and here they are. i was woundering which relay this is and if i replaced it would it fix my problem... thanks

MB543648V
12V
G8R-27M-V

05Y7A1

 

[TurkF26]

take that relay to the dealer (or go to a junk yard) and just get a new one. I think that relay is for the power door locks but not sure. If its clicking when the car is off id just replace it and it should fix your problem

 

[luv2rallye]

If it's the horizontal pair under the radio, the right one is the starter relay (ignition switch when in start supplies power). If it's the vertical pair to the right of the radio, the right one is the MFI relay(turned on by ECU). With the key off neither should be getting power and you need to figure out why.