Sounds like you have what's called a Parasitic Draw, something is using too much electricity when the truck is off. These things can be tough to find, and drive you crazy! :wink[3]:
Yours seems to be consistent at least, be glad of that, the internment ones will kill ya...
It's detective work really, but you need to prepare to have your batteries dead while doing it (for important times pull Both (+) cables when it sits.)
You can use a mulit-meter inline with a battery terminal in the Amps position to see how much current is being drawn (do this with with one battery disconnected to know the total amount). Shouldn't be much after things "settle-down" as the truck sits (takes awhile for all the electronics to shut down - up to 1/2hr)
You could also start by just taking 1/2 the fuses out of the fusebox and see if that stops it. If not, replace them and take the other 1/2. Then put some back until you narrow down the circuit that has the draw. It's a process.....
Yours seems to be consistent at least, be glad of that, the internment ones will kill ya...
It's detective work really, but you need to prepare to have your batteries dead while doing it (for important times pull Both (+) cables when it sits.)
You can use a mulit-meter inline with a battery terminal in the Amps position to see how much current is being drawn (do this with with one battery disconnected to know the total amount). Shouldn't be much after things "settle-down" as the truck sits (takes awhile for all the electronics to shut down - up to 1/2hr)
You could also start by just taking 1/2 the fuses out of the fusebox and see if that stops it. If not, replace them and take the other 1/2. Then put some back until you narrow down the circuit that has the draw. It's a process.....
