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Headlight upgrade to LED problem

Tiny
ROSS CARTY
  • MEMBER
  • 2002 HUMMER H1
  • 6.5L
  • V6
  • 4WD
  • AUTOMATIC
  • 30,000 MILES
I have installed some Vision X 7" LED headlights in my vehicle and only the Halo/high beam is working. My low beam does not come on but flickers slightly. Does anyone know what the problem might be and how to fix it?
Sunday, September 2nd, 2018 AT 10:55 PM

16 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I am Danny.

Let me check into this for you but it sounds like a Ballast problem.
Danny-
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Monday, September 3rd, 2018 AT 2:33 AM
Tiny
ROSS CARTY
  • MEMBER
  • 8 POSTS
Hi Danny,
Thanks for the reply. Your help would be appreciated.
Ross.
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Monday, September 3rd, 2018 AT 4:15 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Is there there a chance you can upload a picture of the lens and ballast? Thanks again for using 2CarPros.
Danny-
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Wednesday, September 5th, 2018 AT 2:48 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

I have found a picture and I have attached it for you. Having just the low beams flicker means it is not getting enough power. Check the blue wire connection to make sure tight, no corrosion, damage, etc. If you have a voltmeter make sure that circuit is getting 12 volts. Hope this helps and let me know how things are going. Thanks again for using 2CarPros.
Danny-

https://www.2carpros.com/articles/how-to-check-wiring
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Thursday, September 6th, 2018 AT 6:08 PM
Tiny
ROSS CARTY
  • MEMBER
  • 8 POSTS
Thanks Danny, Will do and get back to you.
I had a look for a ballast, but could not find anything that might resemble them.
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Thursday, September 6th, 2018 AT 10:00 PM
Tiny
ROSS CARTY
  • MEMBER
  • 8 POSTS
Hi Danny,

Here are the test readings I have taken before and after the High four adapter P-HLHI4 that allows low beam to be on with high beam on. I took readings for both the red and blue wires, before and after, when the lights were on high beam and low beam.
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Saturday, September 8th, 2018 AT 1:46 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.
Looking over your readings. Did you install this or a shop? Just curious to know if this setup has a Ballast as well.
Danny-
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Sunday, September 9th, 2018 AT 10:30 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again Ross.

Just curious. Were you able to inspect the ground and low beam wires? If they look good I would like you to try something. Bench test the light (hook it up directly to the battery) to check the high and low beam. This will confirm there is an issue with the light. Hope this helps and hope to hear back from you soon. Thanks again for using 2CarPros.
Danny-
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Monday, September 10th, 2018 AT 11:56 AM
Tiny
ROSS CARTY
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  • 8 POSTS
Hi Danny,

The lights works okay when connected directly to a battery. Both high and low beams.
Ross.
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Monday, September 10th, 2018 AT 4:29 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hi Ross.

Well, there lies the problem. It is in your wiring. You should really double check the ground. Where the bolt/screw attaches to the frame use some sandpaper to ensure a good ground. Check for any signs of a bad/loose connection in all the wiring. Did you install or a shop? Hope all this helps and thanks again for using 2CarPros.
Danny-
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Monday, September 10th, 2018 AT 5:30 PM
Tiny
ROSS CARTY
  • MEMBER
  • 8 POSTS
Hi Danny,

Thanks for this.

Do you know where the ground attaches on the vehicle on a 2002 Hummer H1?

A mechanic shop did the install of the lights.

Ross.
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Monday, September 10th, 2018 AT 7:15 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

It will usually be close by the front core support. If you chase that ground wire you should be able to locate. Should be secured with a self-taping screw. Hope this helps and feel free to ask any questions. Thanks again for using 2CarPros.
Danny-
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Monday, September 10th, 2018 AT 10:43 PM
Tiny
ROSS CARTY
  • MEMBER
  • 8 POSTS
Thanks Danny,

I jumpered the ground to the battery and there was no change in the lights.

When I jumpered the power directly to the battery and the low beam worked a lot better. They were twice as bright.

Do you still think it is a ground issue?

Ross.
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Tuesday, September 11th, 2018 AT 9:33 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello again.

Yes, I would double check all the connections especially the ground. Have you talked to the shop that did the install?
Hope this helps and thanks again for using 2CarPros.
Danny-
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Friday, September 14th, 2018 AT 4:01 AM
Tiny
ROSS CARTY
  • MEMBER
  • 8 POSTS
Hi Danny, yes checking grounds at the moment.
Thanks,
Ross.
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Saturday, September 15th, 2018 AT 2:59 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hey Ross

Okay. Hope you find the issue. Thanks again for using 2CarPros.
Danny-
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Saturday, September 15th, 2018 AT 5:12 PM

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