Outback electrical gremlins

[svxxx26]

I have a friend with a 2002 Outback LL Bean (H-6 3.0).
It has run fine for 2½ years, has around 50,000 on it - "however"....

It has just started having bizarre electrical issues.

- Power windows work sporadically.
- Headlights won't come on, then may come on after turning ignition back on.
- Same thing with tail lights.
- lighted ring around ignition won't come on.

A month or so ago, they reported that the security system was acting strangely. Now the lights do not blink as they usually do when arming/disarming.

My only guess is water damage from long ago now just showing up. Doesn't really make sense though, that it would take that long to show up. My second guess is a bad security system module? would that be possible?

Any ideas on this anyone?