What may be causing issue with headlights turning on by themselves even when car is off?

Asked by Apr 16, 2014 at 01:54 PM about the 2007 Pontiac Grand Prix

Question type: Maintenance & Repair

My wife drives a 2007 Grand Prix - Last week when I came home I noticed that even
though the car was off her headlights (and only her headlights were on. By the time I
got into the house and asked her about it she noticed her lights were on from the
window and by the time we got back outside they were off again. Then comes last
night we get home from working out lights turn off as we turn off the car we get in the
house about five minutes or so later look outside and once again the headlights were
on, this time we could not get them to turn back off unless we turned the car on and
back off but again within about 5 minutes of turning the engine off and locking the car
the lights were back on.

1 Answer

4,965

This can be caused by a faulty Body Control Module or faulty snesor. The headlights are controlled from the dash but also from the security system (unlock=on, lock=delay off). Stray voltage or a worn sensor can cause the BCD to randomly power and unpower the headlights while the car is off or locked. You'll need to have the BCM scanned for trouble codes to see what's going on.

13 of 13 people found this helpful.

Your Answer

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,590
  • #2
    Tom Demyan
    Reputation
    3,170
  • #3
    munron
    Reputation
    2,600
View All

Related Models For Sale

Used Chevrolet Impala
466 Great Deals out of 31,445 listings starting at $1,000
Used Dodge Charger
305 Great Deals out of 35,594 listings starting at $1,999
Used Pontiac G8
8 Great Deals out of 406 listings starting at $4,450
Used Pontiac G6
33 Great Deals out of 3,548 listings starting at $999
Used Chevrolet Monte Carlo
6 Great Deals out of 1,106 listings starting at $1,125
Used Pontiac Grand Am
913 listings starting at $2,295
Used Pontiac GTO
392 listings starting at $3,950
Used Ford Mustang
332 Great Deals out of 41,500 listings starting at $1,488
Used Chevrolet Malibu
943 Great Deals out of 52,791 listings starting at $1,599
Used Dodge Challenger
156 Great Deals out of 25,864 listings starting at $7,250
Used Jeep Grand Cherokee
859 Great Deals out of 72,064 listings starting at $900
Used Buick LaCrosse
308 Great Deals out of 14,188 listings starting at $1,900

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
8 Great Deals out of 363 listings starting at $1,900
2007 Pontiac Grand Prix For Sale
304 listings starting at $4,499
2006 Pontiac Grand Prix For Sale
397 listings starting at $4,000
2005 Pontiac Grand Prix For Sale
295 listings starting at $2,499

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.