Question about 1999 Pontiac Grand Prix

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On my grand prix gtp the instrument panel lights blink on and off, when it does that my windows will not work and the car will lose power and will barely go, my trunk lid will not open with the button and the locks lock on and off. This all started when the panel lights started to act up. Can you please HELP!!

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Sounds like a ground problem . Do you know anything about automotive electrical circuit's ? Do you know what a wiring diagram is ,how to read one , use a DVOM - digital volt ohm meter ? Reading factory service repair info. on how these systems work would be a good idea also . But the main thing would be to look at wiring diagrams to see if these thing's share a power or ground supply . You look at wiring diagrams here Enter the vehicle info year , make , model an engine size . Under system click on body & accessories ,then under subsystem click on instrumentation . Click the search button then the blue link.Scroll down through the diagrams an note all grounds , wright them down . Find the diagrams for all the affected systems an wright down ground #'s . Watch these video's on electrical testing .
Electric Testing Techniques You Need to Know

Posted on Dec 24, 2017


4 Suggested Answers


Shannon Washam

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SOURCE: 1997 grand prix gtp. Tire pressure/abs light

Hello! This indicates a fault with the wheel speed sensor/ABS sensor. Any major auto parts retailer can pull the details of this code (which sensor) for free, which will help you identify if the wiring is loose or damaged or if the sensor will need to be replaced. If you need to replace the sensor - you will need to replace the entire wheel bearing assembly, as the sensor is internal.

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Posted on Nov 02, 2009



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SOURCE: Looking for rocker panels for 2000 pontiac grand

These rockers are also available at - $8 UPS ground shipping if you mention you heard about them on fixya!

Posted on Jan 25, 2010

tim mcgrath

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SOURCE: Location of mass air flow sensor, 2000 Grand Prix GTP

3.1 or 3.8 motor, mass air flow is in the fresh air (goes from air cleaner to engine)

Posted on Feb 07, 2010

Ken Boote

  • 1 Answer

SOURCE: 2005 grand prix -- trunk lid won't open

If you will turn the ignition on, press & hold the door lock release button to the left . . . . viola!

Posted on Aug 17, 2010

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