2017 Silverado Power Drain overnight.

Bryant_Gallagher · March 28, 2020

Hi, I have a 2017 Chevy Silverado that has a issue. The truck battery drains itself overnight. There is a .2 amp draw. Unfortunately I can’t seem to find the problem. I thought it was a bad ignition relay powering the transmission/ignition fuse (F40 under the hood fuse box) but I’m not sure that’s the issue anymore. The battery tested fine and the alternator as well. Please help I’m sick of using a jump box every morning.

elcamino · March 28, 2020

Any accessories not original to the truck? Like a Range AFM disabler?

JimCost2014 · March 29, 2020

Having too many details about your truck is never a bad thing, having none makes it hard to get a response that can help.

Share everything, especially as mentioned above, aftermarket stereo, The Range device, lights, ect…..

Bryant_Gallagher · March 29, 2020

Good call but sadly No aftermarket devices that are electrical are connected.

truckguy82 · March 29, 2020

well the obvious thing to do is use a multimeter and pull fuses one by one until you dont see the draw

did you do that yet?

truckguy82 · March 29, 2020

I think there are Interior fuse panels on the left and Right side of the dash. You have to remove the interior panels. They are panels that are only exposed when you open the door. They are literally on the side.

truckguy82 · March 29, 2020

I’ve never tried this, but I have used one and they are amazing.

i’d bet a thermal camera could see the draw if the place your in is cold enough. Home depot rents pretty good ones. I think you can buy reasonably priced ones that attach to your phone as well. They come in handy.

Found so many thermal leaks in my house using one.

Edited March 29, 2020 by truckguy82

JimCost2014 · March 30, 2020

Have you checked your battery grounds?

Unfortunately the factory batteries always seem to "check" out ok, even in most cases when they are failing. If it is the original, it could be the problem.