Dodge caravan ground points?

I am getting wierd things happening on a 2001 dodge caravan - all
electrical related.

I suspect grounding issues. Can anyone advise of the main ground
points on this vehicle?

- Battery
- I guess cable from engine to body.
- I am aware of one in the rear tail lamp assembly (left rear I
think).

Any others to check before I itemize the issues?

Also - does anyone know how difficult it is to remove the main fuse/
relay block near the battery in order to 'flip' it over and clean and
check things?

tia for your patience and assistance.