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camerontech
camerontech, auto technician
Category: Pontiac
Satisfied Customers: 509
Experience:  diagnostic auto tech
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My 2007 grand prix gxp, the headlights randomly turn on and

Customer Question

my 2007 grand prix gxp, the headlights randomly turn on and off when the car is parked
JA: Have you checked the fuses? Have you checked the bulbs?
Customer: yes
JA: Are you fixing your Grand Prix yourself? What have you tried so far?
Customer: yes, i had the battery, alternator and starter checked because the car goes dead at night when it's parked
JA: Anything else you want the mechanic to know before I connect you?
Customer: does this cost?
Submitted: 1 month ago.
Category: Pontiac
Expert:  camerontech replied 1 month ago.

hi there

im cam, a licenced diagnostic tech

i ahve seen this a few times on these and some buicks

there is a hdm relay (headlight driver module realy) in the underhood relay fuse box.

swap this relay (#35) with another of the same relay and see if this stops. I will usually use the horn relay as this will also let me know if the horn starts instead of the lights.
if it stops flashing than the relay must be replaced

Expert:  camerontech replied 1 month ago.

hi there

let me know if i can assit you any further!

please take a moment to rate me

thanks and i appreciate postitive ratings!

cam