Tracking down a short

I hope I am correct on this so here goes..
#1 using a volt meter to see the voltage draw by removing the
negative battery post, attach one lead to the battery negative post
and the other to the ground wire you removed and see what amount
of draw there is ( DC volts setting or use a light tester )
with the key shut off and pull the light bulb under the hood if there is one.
Pull each relay and fuse till you see the gage drop.
this will get you to the circuit that is drawing current as it sets..

The first thing I would do is when it is totally dark outside make sure the clove box, interior and all lights are off and not on...
I believe there are many lights in these vans, even under the passenger set storage but not sure if there is one on this van.
Anything that stay powered up with the key off is where you want to look......... I hope a good tec jumps in here soon so you can help these elderly folks.