Battery draw, Parasitic draw

[Steve Lowenberg]

I want to find what’s drawing down my battery, but i need to make sure the dome light switch is off when door is open to check fuses, but it dosn’t have a nice simple button on door frame like in the old days. I think the switch is in the door. How can i simple disengage so i can have the door open while checking fuses. Or can i just take out the dome light fuse, and if the draw is from that circuit, i guess my multimeter would tell me that, right?
Also can i just unplug the under the hood light. That would show a draw on my multimeter unplugged, would it?
Thanks for the help

 

[Rich_007]

maybe just pop the dome light bulb out? Don't know if there is more on that circuit than jus the light though.

 

[Don Hall]

Does your truck have a dimmer roller switch on the dash? If so, switching it
completely off will negate the dome light

 

[Steve Lowenberg]

To many interior lights, just looking for simpler way and I thought power would still be going to interior lights dimmer and would affect the reading, but will try.
But first i wanted to establish whether i had a draw. I have good battery, disconnected neg and with multimeter on DCamp, connected one lead to batt and other to disconnected cable. All i got was a clicking relay in the engine compartment fuse box. Multimeter just jumping around. I do have red lead on multimeter plugged into the dcamp spot and set on dcamp.
Wondering if it’s my multimeter(new battery’s, but that shouldn’t matter). ?
So obviously i still don’t know if i have a draw, but I’m sure i do cause when i charge battery with it connected it goes dead in couple days, but when i charge battery disconnected it holds charge.
Thanks for your feedback.

 

[Don Hall]

How to measure amps:

https://www.hagerty.com/media/maintenance-and-tech/measuring-current/