Question about 2001 Chevrolet Tahoe

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Window switch lights, DRL, and fog lights not working

I have a 2001 tahoe LT and a while ago my fog lights worked, but now they don't turn on. I've changed both fog light bulbs and nothing. I noticed when I push the fog light switch the light indicator doesn't turn on. Another thing I noticed is my window switches and unlock button lights do not light up anymore. The last thing is I pulled the DRL bulbs and I swithced them out with new ones, but when I took out the old bulbs the socket looked burnt and the new bulbs didn't work. I have no idea what the problem can be and I've tried to look it up but nothing. The closest I can get to this problem was a post a guy put up saying that a green wire was pinched but I have no idea where and what the wire is. Any help will be greatly appreciated. I have put a new radio but they the fogs went out before I did anything to the truck. Thanks for reading

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Voltage testing is the way to find problems like this . or voltage drop testing . Find a wiring diagram an trace out the circuit , Don't go by someone said something about a green wire . Watch these videos on youtube Electric Testing Techniques You Need to Know
The Trainer 32 How To Read An Automotive Block Wiring Diagram
If you want to fix electrical problems need to learn how don't guess or go by some guy talked about a pinched green wire .
How to read an electrical diagram Lesson 1 Then find a wiring diagram at Enter your vehicle info. year , make , model an engine size . under system click on lighting , then under subsystem headlamps . Hit the search button ,you'll see three links . Click on the second , this is the DLR diagram , you'll see a drl relay , a BCM - body control module , DRL fuse 10amp located in the under hood fuse box . IGN fuse 10amp supply's B+ voltage to the control side of the drl relay . With a DVOM - digital volt ohm meter test voltage supply . Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts If you want to fix electrical problems on your vehicle you need to learn how ! Or leave it to a professional like me ! I've been doing it for over thrity years . These resources i have listed , wish they would have been around back when i first started .

Posted on Mar 16, 2017


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Posted on Jan 02, 2017



  • 3 Answers


You'll have to order the socket from the GM dealer. I've tried some common park/tail light sockets from Napa, etc. and none fit the lens housing. Part# for my 2004 GMC Sierra is 15306157. (Yours may be different, but probably not)
Remove the headlight lens (unclip & flip the two black steel rods towards you and pull them straight up & out). The lens should almost fall out if the bulb wires didn't hold it in!
There are only two wires, and since incandescent bulbs are not polarity-sensitive, they can go either way without mixing them up. Just cut & strip the old socket's wires, and strip & crimp the new socket on. ****-type crimp connectors were even included with the socket.

Posted on Apr 03, 2009


  • 3 Answers

SOURCE: I have a 2001 chevy hd2500 duramax 4x4. I have

check the ground on the lights.

Posted on Nov 30, 2009


  • 1244 Answers

SOURCE: 99 chevy 1500 with DRL feature; headlights won't

change the headlight switch!! itself its broken inside the unner contacts

Posted on Jan 17, 2010



  • 116 Answers

SOURCE: i got a 2004 chevy

If it is anything like my 04 GMC Sierra, there is a relay panel under the hood. In that underhood box where you found the fuses, there are also relays. They pop out (the diagram is on the lid of the box). After the GMC hit 200k, the relays started going out. The high beams are on a relay, the lowbeams are on a different one. You can pop one out and replace it with the horn or foglight relay if you want to check it out. I am betting that the DRL bulb just happened to go at the same time. Mine go out regularly..I would say around every 10-15k miles. I don't know if this helps, it is just something that I have run across with a similar vehicle.

Posted on Aug 16, 2011


Harvey N Tawatao

  • 3854 Answers

SOURCE: 1995 chevy suburban headlights won't come on

Common for the wire harness on the switch to go bad. Inspect the wire harness where it clips on to the switch and look for any signs of damage.

The plastic heats up from the current running through the switch and causes it to melt and then you loose connection caused from melted plastic between the contacts from the harness to the switch.

There is a upgrade to the headlight harness which is larger then the ones that came with the Suburban to address this issues. You can get them at the dealer or NAPA i believe.

Good luck and keep us posted. Thank you for using fixya and stay safe.


Posted on Nov 03, 2011

Testimonial: "I replaced the turn signal switch which solved the problem. It was that. The headlight wires had melted at the connector. The pain is the new turn signal switch has a malfunctioning wiper component causing the wiper delay to turn on with out being on. Now I have to do it all over. "

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I have a 2014 Police Chevy Tahoe and want to turn the DRL back on, how do I go about doing this ?

The DRL system will come on when the following
conditions are met:
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When the DRL are on, only the DRL lamps will be on.
The taillamps, sidemarker, instrument panel lights,
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When it begins to get dark, the automatic headlamp
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Here is your Owners Manual as a PDF file

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I have 95 mustang and my fog lights are not working at all. And recently my headlights would stay on for five minutes then they turn complete off while I'm driving. Most of the time I have to turn on my...

In the engine compartment fuse box, check the 20A DRL, FOG, HORNS FUSE and confirm that the FOG LAMPS RELAY is in place. Fog lamp operation depends upon the DRL setting so the DRL circuit may be defective which would account for the headlight problems.

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Obviously you need wiring diagrams or you can't
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How would someone answer your question ?

The switch you replaced was tested & failed or your
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These trucks are known for bad multifuction switches.
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My drl switch is bad iv'e concluded... but now i have no headlights high or low. is this a blown fuse from lack of drl switch replacement or what. i still have my parking lights but no headlights

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I tried to disable DRL but when i did my low beams dont work, any ideas?

You are wasting your time. This system is automatically controlled by the Daytome Running Lamp module. The system requires the daytime running lamp relay to work in order for the low beam headlamps to work. Any attemps to "disable" the daytime running lamps will also disable the low beam headlamps. I think what you are having problems understanding is that your headlamp switch does not actually turn the lights on. The switch only provides power so the DRL module can doesn't send power directly to the lamps. The power to the lamps is provided by the relay, which is operated by the DRL module. Unless you want to completely "re-engineer" the ENTIRE headlamp system, you are not going to get it to work the way you are wanting it to.

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You have a short to ground somewhere in the drl-fog lamp circuit. Check for obvious wiring connector or wiring to drl & fog lamps. check wiring for pinched or broken wires coming from sockets. If you don't find problem, you can trace wiring from lamps to main harnesses and hopefully find source of short.
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