It's hit winter and my hilux that I purchased few weeks ago is now struggling to crank in the morning. It's a new battery and I've checked the voltage and all seems to be fine. I suppose the next thing is alternator (what's the best way to test)??? However I have suspicion that I may have a power drain, as I checked the amps on the negative connector and it was hovering from .11 to .83!!!! I started checking the fuses and noticed that when I removed the STA fuse the amps dropped, I've searched on google what the STA fuse does however didn't have much luck, I think it might have something to do with starter motor? I'd like any feedback regarding best ways to to test vehicle to determine the cause of the problem. Has anyone ever dealt with a power drain out there??? Thanks