Question about 2002 Pontiac Grand Prix

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A/C only works in the daytime and will freeze u out. Will not work at night or early in the morning.

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  • Mike May 11, 2010

    that is a very unusual condition. The next step is to determine if the compressor is engauging during night or early morning. What happens if you use defrost (which actuates the compressor for moisture removal)? The first key is the compressor answer. Then, is your system auto temp control? Are you able to maintain correct temp? What is the outside temp during these conditions, both working and not?

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If the system is automatic ac control sounds like sunlight sensor on top of dash make sure its not coverd or bloked or its defective.looks like a little red lite on dach also check your owners manual may show its location.

Posted on Sep 13, 2009

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Posted on Jan 02, 2017

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1 Answer

Running headlights not working need solution or is there a switch for lights


Head light have two relays.one for daytime and one for normal night. the daytime switching the light to serial circuit and if one bulb is out down both Leigh quit working. Inspect your light high and low beam for normal operation . Inspect your fuses . Swap the daytime relay with identical one.and under the dash is module for daytime running light. inspect the red/black wire for ground from light switch and light blue/ yellow for power from 15A ECU-B fuse
good luck

Jun 05, 2014 | 1994 Toyota Camry

1 Answer

1998 Lumina lights don't work at night!The lights work during the day but not at night. Does anyone know how to fix it?


Theres a sensor in the middle of the dash by the front windshield that detects sunlight and triggers the automatic headlights. The main headlights and daytime running lights might be on a different circuit, in which case they daytime running lamps would turn off at night and the main headlights would turn on, indicating the main headlights arent working and the daytime running lamps are working as intended.

I would check all the fuses related to headlights, check the bulbs and check the switch, then last the light sensor on the dash.

Jan 08, 2014 | 1998 Chevrolet Lumina

1 Answer

My a/c will freeze you to death until you stop (i.e @ a light or sign)then it starts blowing warm/hot air especially on hot day's.at night or early in the morning there does not seem to be any...


sounds like your condensor is working great with forced air pushing through i.e. driving ...i would start by cleaning the condensor with high pressure air blowing through the radiator towards front of car you can use a hose with water as well ...you should be able to hold a light behind the radiator and see straight through from the condensor ...if you can not see through..you have a plugged up condensor ..

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1 Answer

Daytime running lights off


there is usually a sensor on the dash probaly in the defrost vent

Apr 13, 2010 | 2000 Buick Century

1 Answer

Alero: low beams as bright as Daytime runners while brights work?


Look for the relay for the head lights,it may be bad.Also look for a bad ground.And check the bulbs too.

Nov 04, 2009 | 2003 Oldsmobile Alero

2 Answers

Low Beams suddenly stopped working


SURE!...Take/Tow your vehicle to an authorized Hyundai dealership and pay the diagnostic fee... they will tell you exactly what the problem is and the cost of parts/labor to fix it... at least this way you'll know what the problem is and what's required to fix it. OR --- Go to www.hmaservice.com and register( Vehicle by VIN). Afterward, you have access to shop manuals, service bulletins, wiring diagrams, etc. about your vehicle.

Oct 02, 2009 | 2006 Hyundai Elantra

1 Answer

My blower motor only works on high speed its a 2005 jeep liberty it worked fine last night when i got home i started it early this morning and it would only work on 4


Your blower motor resistor has gone bad. Everytime these go out (definitely happens a lot on Jeep) you will lose every speed except for the highest one. Replace your resistor and you will be back to new. Let me know if you have any further questions. Thanks for using FixYa!

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