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Headlights dim

Tiny
BERRY4271
  • MEMBER
  • 2004 CHEVROLET MONTE CARLO
  • 3.8L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 197,000 MILES
Just bought car wrecked in front. Passenger side headlights work fine the driver side headlights are on but very dim and the bright and dim are on at same time. Replace bulbs and checked the ground did not do any difference.
Saturday, June 23rd, 2018 AT 6:49 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning.

Do you have a volt meter to do some voltage checks?

You need to verify the voltage at the orange wire at the headlight that is dim.
Do that with the connector off first then check it with the headlight hooked up.

Roy
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Sunday, June 24th, 2018 AT 7:14 AM
Tiny
BERRY4271
  • MEMBER
  • 4 POSTS
Thanks Roy, I checked orange wire unhooked 12 volts when hooked it was 8.6.
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Monday, June 25th, 2018 AT 3:30 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, that is why it is dim. You have a voltage drop in that wire back to the fuse box. Check the voltage at the fuse block and see if it is the same.

Roy
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Monday, June 25th, 2018 AT 4:38 PM
Tiny
BERRY4271
  • MEMBER
  • 4 POSTS
Roy Thank you! It was the ext. Light fuse was blown. Lights work great now. Thank you
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Monday, June 25th, 2018 AT 5:49 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Good job finding it.

Roy
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Monday, June 25th, 2018 AT 5:50 PM

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