Daytime-Running-Lights won't go off
I've got a 96 Taurus sedan with 133K miles on it; I've maintained it reasonably well.
It was the warmest day of the year here yesterday (95 degrees), and I'd just driven 1/2 an hour at freeway speeds to get home from work: The car was *hot*. I came out of a store and found my DRLs still on even though the car was in park, the emergency brake set, and the ignition off with the key out (any one of which is supposed to turn the DRLs off). I ran several additional erands and the lights stayed on each time.
When I got home I parked close up to the garage doors so I could see the lights from inside. I tried each of those three controls in combinations, and the lights stayed on. I tried the main beams, dimmer, turn signals, radio, A/C -- all on and off to no effect: The DRLs stayed on.
I took the car into the dealership last night and told their after-hours service writer the problem. He looked at me funny and went out to verify that they were, in fact, on. Only then did he write a ticket. The shop called me at noon today to say that they could not replicate the problem -- the DRLs were out when they pulled the car in this morning and the tech could not make the lights stay on.
What could cause the DRLs to stay on?
What could cause the problem to go away?
Is this likely to be a heat related problem and,
what might go the next time the car gets really hot?
Should I view the car as reliable until this is resolved?
I'd sincerely appreciate any ideas or suggestions you can offer.