Does anyone know what's that small pyramid on top of the dashboard, in the middle, by the window? It's a shallow piece, about 1 inch square, black plastic. Looks like a sensor or something...
I did some more digging, the auto headlights are indeed controlled by the RLS attached to the back of the rear view mirror, The little hump in the dash near the windshield is a light intensity sensor for Climatronic HVAC. It's purpose is to control a temperature flap and the fresh air blower depending on light intensity. The instrument console lighting is controlled by yet another, separate sensor in the cluster.
Copied from SHAWNG in this forum
I should have mentioned I have an SE with a 'stupid' mirror - no electrical on it. And the A/C is manual, no Climatronic. Could this be just a dumb cover? You can see it in the middle, behind the tray recess, right under the glass, it's a wee plastic protrusion. Here -v
I remember reading about this earlier. It is a light sensor, just not the one for the auto headlights. I think it is for the dash lights as well as for the HVAC system. I admit it seems sort of wierd to have two sensors that in essence do the same job, but apparently that is the set-up.
I've always wondered what that was too. Sits there right at the bottom of the windshield in the middle where the windshield interior meets the dash edge.
Mine is an SE, and I've seen them in the SEL, not sure about the S models, but believe they have it as well.
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