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DRL and parking lights work, no low beam or high beams

Tiny
JROWE4229
  • MEMBER
  • 1999 CHEVROLET SUBURBAN
  • 7.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 120,000 MILES
Hello, hoping to get some help with this electrical problem. I have no high beams or low beams, but do have DRL. I have checked all fuses and relays that I can find and they are good. I have checked for power at the 50a maxi fuse under the hood labeled lighting and when I turn the headlight switch to on I get 12v. I checked for power at the headlight bulb plug and I have no power. I have replaced the headlight switch. Any suggestions?
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Tuesday, June 18th, 2019 AT 5:32 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,057 POSTS
Hello,

There is a headlight relay that needs to be checked. here is a guide and the headlight with DRL wiring diagrams and relay location to help you fix the problem:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what happens.
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Thursday, June 20th, 2019 AT 1:47 PM

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