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2003 Pontiac Grand Prix A/C Stops, so does Headlights

Tiny
PATRICK JOHNS
  • MEMBER
  • 2003 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 98,000 MILES
The A/C on my GrandPrix only works on high, when you the fan control nob to a lower setting the blower stops working and the A/C light on the control panel goes out. Also the Daytime running lights or Auto Headlights turn off.
Friday, June 4th, 2010 AT 12:44 AM

1 Reply

Tiny
TROGG56
  • MEMBER
  • 3 POSTS
I've owned three GTPs and a GT (latest year 02) and they have all had a similar issue with the Ac only running on high.
In all four cases, the culprit was the ignition switch which is a wiring harness assembly in the steering column along with the blower motor resistors although I never saw the bad resistors.
I don't recall if this affected the headlights or not.
I had a dealer repair the cars but if you're so inclined, there are online instructions with very good photograghs at:
http://www.sparkys-answers.com/2009/09/2002-pontiac-grand-prix-changing.html although these are for an 02 model

Hope this helps
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Friday, June 4th, 2010 AT 9:36 AM

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