NEED HELP Envoy Parasitic battery drain

[evcorchado]

Hi,

I'm sure there's a thread on this somewhere on this site but didn't come up on search, I'm having a parasitic battery drain overnight on my 03 envoy 4.2L and every time seems like fuse relay #43 seem to blown and have to keep replacing it... Someone provide me with thread link or help me solve it since seems to be a common problem in these vehicles... Thank you.

 

[Mooseman]

Just to confirm, fuse #43 is for the right turn signal? I can't see how that circuit could drain the battery since it is off with the key off. I think this is unrelated.

How old is the battery? Did you have it tested? It may just be tired. Also have the alternator output checked. If all that checks out, you'll have to do a parasitic drain test. YouTube has several videos on how to do this.