probably a faulty headlight switch, or you have a bare wire somewhere. My 92 Lesaber is made so the headlights come on automaticaly or you can turn them on with a headlight switch.
because it is night
bad switch or relay, possible short in wiring
Probably a faulty hazard light switch.
The 2000 Buick LeSabre front grill is held in place with eight retaining bolts. Remove the retaining bolts and the front grill will come off.
The bulbs come out of the rear. If you can't get to the back of the lights ytou have to remove them. there are about 8 plastic wing nuts on each side behind the trunk carpet remove them and the whole assy will come out the rear
It stands for Inflatable Restraint sensor might be faulty
Have you checked the fuses?
just changed it today, located right side of engine, under to the right of the engine cover , has wires coming off it looking like a bolt,, water will come out when you loosen the bolt.
Either it has a bad ground, or the motor is bad.
Perhaps they are on a timer or photocell.
There are many features that come standard on a 2000 Buick LaSabre. Some of these features include a laser-etched vehicle identification number plate, a 17.5 gallon fuel tank capacity, and rear bench seats.
Trun signal lights do not come on at all not on dash or outside