Perhaps they were referring to it by a different name--at any rate, according to the "book", it doesn't control the headlights anyway:
"The ETACS control module (Electronic Time and Alarm Control system control Module) controls the front wiper & washer, chime bell, keyless entry & burglar alarm, power door lock, courtesy and tail gate lamps, rear window defogger & outside mirror defogger, room lamp delay, door warning, seat belt warning, ignition key hole illumination and door key hole illumination.
The module is supplied battery voltage at all times from fuse 11. Fuse 9 supplies battery voltage to the module whenever the key is in ON. Fuse 19 supplies battery voltage to the module when the ignition is in ON or START.