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Topic: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED!

in Forum: C3 Electrical


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Re: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED! (2/12)
 12/22/24 10:44am
F4Gary
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air. 2017 Black Rose Grand Sport convertible.


Joined: 8/26/2006
Posts: 1494

Are these ebay special led headlights? 



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Re: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED! (3/12)
 12/22/24 12:10pm
Guff39
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Yup...they are.

Take it that maybe these have been proven in the past to have complications on C3s?

Thanks for the quick reply!

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Re: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED! (4/12)
 12/22/24 12:26pm
F4Gary
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air. 2017 Black Rose Grand Sport convertible.


Joined: 8/26/2006
Posts: 1494

I have a friend that bought so called plug and play LED headlights for his 95 C4 and they didn't work like they should.  I think he got a hold of the seller and the seller sent him new ones that worked.  Chinesium parts are hit of miss unfortunately.



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Re: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED! (5/12)
 12/22/24 12:32pm
Guff39
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Posts: 7

Hmmmm..well its definitely a possibility thats for sure.  I guess i can always go buy a halogen and swap it amongst the buckets to rule in favor of a potential true diagnosis.  Too bad I dont have the stockers...got flooded 2x with Helene and Milton.  Vette was moved to a safe location...parts bin got a tad bit wet.  Ha.  

Thanks again man.  Ill be sure to report back for the forums content.  

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Re: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED! (6/12)
 12/22/24 12:38pm
F4Gary
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Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air. 2017 Black Rose Grand Sport convertible.


Joined: 8/26/2006
Posts: 1494

Good. I hope it's just the headlights.



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Re: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED! (7/12)
 12/22/24 1:34pm
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2465

Not to be judgmental, but do you have the bulbs and sockets in the correct position? 



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Re: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED! (8/12)
 12/22/24 1:55pm
Guff39
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Hello

I "assume" so...I wasnt aware that they had to " clocked" a certain way.  Theyre 4 sided LEDs...Id figure they would illuminate one way or the other.  Judgemental can 100% be a good thing feller! 😜

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Re: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED! (9/12)
 12/22/24 3:42pm
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2465

Hi, one bulb has two prongs for wires, one has three.  Not sure about L.E.D., but the O.E.M. ones are positional. 



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Re: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED! (10/12)
 12/23/24 9:52pm
Guff39
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Well...got a somewhat good update for the thread.

After reviewing some stuff online and revisiting the the harness...I decided to go back to stock utilizing the factory wiring harness and new LED lights...works like a charm, so it isnt the lights per se.  Lights work like intended with factory wiring.

I contact customer service in regards to the harness and they advised the harness is not intended to work with LED lighting options.  

So go figure...ugh.  at least Im back on the right track and not sitting here scratching my head all day and night again.  

Ill run em on the stock harness and monitor for heat at both the light connections and headlight switch.

Thanks 



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Re: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED! (11/12)
 12/24/24 10:21am
manchestersharkLifetime Member
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Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2465

Who Ray!  Glad it all worked out for you. Not sure if heat would be a factor, as the L.E.D.s would pull less amperage and run cooler. What, if any reason was there that the new harness would not work? 



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Re: 1979 Headlight issue. Got hi-beams, but no low-beams. STUMPED! (12/12)
 12/24/24 10:35am
Guff39
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