97 LHS auto headlight on-off control doesn't

My sons 97 LHSs and mine have the auto on/off headlight controls.
Neither turn the headlights off during the day. Mine used to - before
I had a 'remote' reconfigured. I've replaced the sensor on mine to no
avail.
Anybody have any ideas? Are these controled by the body (or whatever
it is) computer? I didn't find the circuit in my Haynes manual.
tia

 

I have two, and they're both doing it too. The lights will go out in dim
daylight, but as soon as the full sun hits them the lights are back on
again. I have done nothing to fix them, but I suspect the BCM is
overestimating the amount of sunlight, and it goes so high that it goes into
some "error" mode which turns the lights back on.

 

Extra followup on this topic: it's not covered in the factory shop manual.
It says there's a separate "body diagnostic procedures" manual.

 

In case you're still out there.
My dealer finally confirmed the lights on is controlled by the body
computer. Wants 70$ to see what the codes are!
I'm tempted to change out the 'puter to see what happens.

 

Thanks! I'm still here.