[finall]

Humtech,

It is the light which is mounted inside the front passenger door. This is the ONLY light that comes on by itself while driving. Not the overhead console lights nor any other light.

Only noticed it at night. Did it while driving at night a few times. Did it while it was night for a while, NOT during a transition when the headlights come on. Nor did it seem to coincide with any other event while driving.

Door was NOT showing ajar on the dash, which it should if that circuit was completed to turn on the light if the door was ajar. Right?

As Tower suggests, a bad door switch? But, would a bad door switch that activates to turn on the passenger door light also not turn on all the entry lights inside the vehicle, since I presume it is all one circuit?

If this info helps, the vehicle a while back had a dead battery in the morning, running about 9V when I threw it on the tester. I thought that the H2 had 'battery rundown protection" which shut off a draw if the battery hit 11v at rest. It only did this once, a few months ago. No reason for it that I could find, so I did not worry about it further. Battery drop-load tested OK, and is fine to this day. Could this be related? Does this info help?

Any other ideas?