Day Time Running Lights Relay

Tiny
KCBRAND
  • MEMBER
  • 1999 CHEVROLET TAHOE
  • V8
  • 4WD
  • AUTOMATIC
  • 108,000 MILES
Where is the DRL relay located on my 1999 Chevy Tahoe? My DRL quite working and my regular headlights still work fine. I have tested the #15 fuse and it is good. Someone told me to replace the DRL relay, but I don't know where it is located. They said it is about an inch square with 5 prongs. They thought it may be under the dash.
Monday, January 12th, 2009 AT 3:14 PM

6 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
In the 1999 Chevrolet Tahoe, the Daytime Running Light (DRL) relay is indeed located under the dash.
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Monday, January 12th, 2009 AT 3:29 PM
Tiny
KCBRAND
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I checked under the hood in the fuse/relay box and found a few relays, but not the DRL relay (they are all labeled). I did find a couple of relays under the dash, just above where your left foot sits. One was the exact same as I purchased (a 5 prong relay, about an inch square). I replaced that relay, but the DRL still don't work. Any more suggestions?
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Tuesday, January 13th, 2009 AT 6:06 AM
Tiny
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HiYes on your year it is left convenience center so the one you replaced was DRL relay.
Test light to terminal G5 a Purple wire see if voltage is there. This is what pulls relay in from the DRL module also on left side dash. If no voltage then module is not functioning. Also is DRL indicator light on?
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Tuesday, January 13th, 2009 AT 7:34 AM
Tiny
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Yes, the green light is on, on my dash board. I will check the purple wire later this morning. Thanks.
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Tuesday, January 13th, 2009 AT 8:06 AM
Tiny
KCBRAND
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I'm not sure what or where terminal G5 is. I do have a purple wire plugged into the convenience center. I did use a volt meter and tested for voltage between the purple wire and ground. No voltage. Is there more than 1 DRL relay or do I have other problems?
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Tuesday, January 13th, 2009 AT 8:23 PM
Tiny
DOCFIXIT
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Make sure beam indicator is on low beam.
The five trem. To relay hear is what you should read
Pink 12v
Yellow 12v
Purple 12v
Light green/Tan ground
Tan 12v
Do you hear relay click when placed into term?
Also on left side there is the DRL control module has about 11 wires to it this maybe the fault.
Let me know what you get at relay.
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Wednesday, January 14th, 2009 AT 8:36 AM

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