fog light upgrade light's

2011 CHEVROLET AVALANCHE

158,621 MILES • 5.3L • 6 CYL • 2WD • AUTOMATIC

ROYCAR71

MEMBER
359 POSTS

I'm upgrading to 5202 LED Fog Light Kit ironwall. The old halogen lights work, but when I replace with led lights they don't turn on. Do I need to upgrade relay in circuit?

Feb 19, 2021 at 5:31 PM

STRAILER

✓Experienced Mechanic
55,051 POSTS

Nope, they should work. you can check for power and ground using this guide with the fog light wiring diagrams below to show you how the system works:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know what happens.

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Professional Diagram for 2CarPros Members
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Feb 21, 2021 at 1:54 AM

ROYCAR71

MEMBER
359 POSTS

Quick note. The wiring and fog lights are after market I installed. It came with 30 amp relay and 15 amp fuse. This setup works fine with regular halogen bulbs. But new led lights with fan in back they won't. Is that a sign that it's not getting enough power?

Feb 21, 2021 at 7:34 PM

STRAILER

✓Experienced Mechanic
55,051 POSTS

It could be. let's check using a voltmeter. this guide can help us figure out what's going on:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Please run down this guide and report back.

Feb 25, 2021 at 12:02 AM