Question about 1998 Pontiac Grand Prix

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Reoccurring Problem with Multifunction Switch

I've been having this problem for a while, my day time running lights work fine but as soon as it gets dark out they turn off and the only lights I can use are my fog lights, low beams and high beams both don't work. I replaced the multifunction switch because the gray plastic part the slides into the wire harness was starting to melt on one side. This fixed the problem for a few months, but then it slowly started happening again, only working sometimes, and now they're not working at all again. What could be causing this problem?

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  • Jeffrey Kozma
    Jeffrey Kozma Nov 21, 2013

    Also the lights are the only things I've had problems with, turn signals, windshield wipers, break lights and tail lights, hazards, everything else works fine.

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  • Master
  • 1,082 Answers

If changing out the "multifunction switch" worked for a while, and some plastic is being heat damaged, I would suspect a poor connection in the wire harness where it terminates into the switch. If a connection is reduced because of broken wire strands or dirty connections, the remaining capacity (of the wire strands or smaller area of contact) must take the full load being demanded by the lighting system, causing the poor connection to get hot, possibly arc and get worse or fail completely in a very short time. I would first try an Electrical contact or switch cleaner and thoroughly clean out the assembly, while checking for loose or cracked connectors. Follow all safety precautions for the cleaner spray, available at auto parts stores.
Try to determine if the switch area is getting enough air flow for cooling.

Posted on Nov 21, 2013

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Posted on Jan 02, 2017

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SOURCE: 1999 Sunfire Headlight problem

on the driver side follow the wire that goes from driver to passager in the middle i saw many broking wire in there hope it help fixya our post thanks pierre

Posted on Jul 21, 2008

GM Elec
  • 1000 Answers

SOURCE: 02 Grand Am SE Instrument lights, fog lights don't work

There is a 10amp fuse located in the fuse box under the R/S instrument panel end cap cover.
Open the passenger door, remove the cover, if I remember correctly it is held in place with clips.
The Illumination fuse probobly blew when you were working on the multifunction switch, it happens.
Good luck, let me know if there is any thing further.
Regards,

Posted on Feb 20, 2009

  • 1 Answer

SOURCE: 2000 grand prix day time running lights/blower not working correctly

Believe it or not, but it was a bad ignition switch. I the switch apart and found about 3 different and one in particular that were burned pretty bad. Must have been the circuit that controls the blower and DRL? Found the solution on another blog. I put a new switch on in about 1.5 hours. I does take a couple special tools, very small female torx sockets. Other than that pretty easy.

Posted on May 25, 2009

emissionwiz
  • 76164 Answers

SOURCE: low beams do not work

the problem is most likey the main headlight switch and the headlight switch connector.

Posted on Oct 19, 2009

wracefans24
  • 1985 Answers

SOURCE: i have a 2005 montana i installed hid headlight

yours is the fifth problem with the hid headlight kit,
have no idea,it may be their problem since people are having trouble.

Posted on Dec 22, 2009

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The day time running lights module , ambient light sensor , would be a good guess but that's all it would be .Do you know what these are ? Really don't think there is a short in the multifunction switch . Maybe it's time to take to a qualified repair shop , dealer ! Cadillac or Buick .

Daytime Running Lamps (DRL)
The Daytime Running Lamps (DRL) control module is designed to automatically operate the exterior lights depending on the outside light conditions.
The DRL control module operates in 2 modes:
• The day mode
In the day mode, the DRL control module turns ON the low beam headlamps at a reduced intensity when the DRL ambient light sensor detects daylight under the following conditions:
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- The park brake is OFF.
• The low light mode
In the low light mode, the DRL ambient light sensor detects darkness, turning ON the low beam headlamps to full intensity through CKT 10.
Additionally, the DRL ambient light sensor turns ON the following lamps through CKT 9:
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