Three problems related to headlights turn off while driving have been reported for the 2005 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Chevrolet Impala based on all problems reported for the 2005 Impala.
The hi beam headlights failed, which made the lo beam headlights go out when the hi beam was engaged. Repair service found a corroded "pin" in a multi-pin electrical connection. This is a "protected" connection, in the engine compartment, it has been corroded for a very long time according to the electric serviceman. He informed me the other "pins" will fail also effecting the wipers and other "necessary" safety components, because of the condition of this connector.
I was driving at approximately 40 mph on a straight roadway with brights on when the headlights went out. This occurred in the early morning while it was still dark out. The parking lights remained on. Pulling the headlight switch on the left side of dash to the "manual on" position did not help. I turned on the fog lights and returned home using the fog lights only. Upon arriving home, I was able to get the headlights to work again by switching to high beam and back. This has been an intermittent problem for this vehicle in the past month. The multifunction switch felt like it was fully engaged and gave an audible click when pulled. I have ordered a replacement multifunction switch to repair this.
Driving on grande blvd tyler TX, on my way to work, headlights turned off completely, turned the high beams on and the headlights came back on.