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Old 05-05-2014, 07:28 PM   #1
Bjaxs
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68 C10 headlights stopped working ?

Hi all,
I'm new here and hoping someone can help.
One day my high beams wouldn't come on but the lights still worked and the very next day both of them went out.
I have replaced the switch in the dash twice just to be sure and then replaced the dimmer switch on the floor and still no headlights. Everything else works fine so I took the dash apart and inspected all the wires and everything is connected good with no burned looking wires or frays anywhere so I am really at a loss as to what to do next, does anyone have a suggestion or point me in another direction?
The 327 engine and trany was done with new wiring less than 10k miles ago so it's not an old system and I am not a mechanic and was hoping to learn stuff on the way but I'm just lost now..
Thanks in advance for anyone taking their time to post.
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Old 05-05-2014, 09:13 PM   #2
VetteVet
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Re: 68 C10 headlights stopped working ?

If you noticed when you replaced the dimmer switch on the floor, There were 3 wires going to it. A blue wire, a tan wire, and a green wire. Those are the three wires that power the bright and dim headlights

When you pull the headlight switch knob all the way out. You should see 12 volts power on the blue wire and the dimmer switch directs this power to the green wire for the high beams, and to the tan wire when the low beam is selected..

The power gets to the lights and goes to the elements and into the radiator support to battery ground. If you have power on the blue wire and none of the lights work then I would jump between the blue wire in the dimmer switch plug and the green wire to see if the brights come on. Then if they do, or don't, come on, then jump the blue and tan wire and see if the low beams come on.

If none of the lights work, then they are all burned out or the grounds for the lights, are not making good connection to the radiator support or the battery negative.
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Old 05-06-2014, 12:24 AM   #3
Andy4639
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Thumbs up Re: 68 C10 headlights stopped working ?

Quote:
Originally Posted by VetteVet View Post
If you noticed when you replaced the dimmer switch on the floor, There were 3 wires going to it. A blue wire, a tan wire, and a green wire. Those are the three wires that power the bright and dim headlights

When you pull the headlight switch knob all the way out. You should see 12 volts power on the blue wire and the dimmer switch directs this power to the green wire for the high beams, and to the tan wire when the low beam is selected..

The power gets to the lights and goes to the elements and into the radiator support to battery ground. If you have power on the blue wire and none of the lights work then I would jump between the blue wire in the dimmer switch plug and the green wire to see if the brights come on. Then if they do, or don't, come on, then jump the blue and tan wire and see if the low beams come on.

If none of the lights work, then they are all burned out or the grounds for the lights, are not making good connection to the radiator support or the battery negative.
What he said! X2
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Old 05-07-2014, 07:13 PM   #4
Bjaxs
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Re: 68 C10 headlights stopped working ?

Thanks for the help..turns out the ground wire was not connected good like you said and also had a burned out light..
Thanks again!!
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Old 09-14-2016, 03:55 AM   #5
SonomaComa
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Re: 68 C10 headlights stopped working ?

Is it difficult to install a relay for the headlights
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Old 09-14-2016, 10:30 AM   #6
VetteVet
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Re: 68 C10 headlights stopped working ?

Quote:
Originally Posted by SonomaComa View Post
Is it difficult to install a relay for the headlights
Quote:
Originally Posted by davidsmith121 View Post
Yaa Is it so difficult to install.

No, it is one of the easiest mods to do.

read these.

https://www.google.com/search?domain...D%3A1%3B&hl=en
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Old 06-16-2017, 01:45 PM   #7
VetteVet
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Re: 68 C10 headlights stopped working ?

Methinks our English friends are playing with us, using verbal dysentery, unencumbered by any desire to communicate without the use of college thesis writing styles. While not really suited for an internet forum, nonetheless it serves to illustrate differences in writing styles.

Perhaps we should retaliate with a course in Ebonics and listen for
heads to explode across the pond.

I'm joking of course and on a somber note, my condolences on your two recent terrorist losses in Manchester and London.
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Old 06-22-2017, 07:01 PM   #8
mongocanfly
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Re: 68 C10 headlights stopped working ?

^^^^^^^reported^^^^^^^dang...their invading us ..I think I got em all reported

Last edited by mongocanfly; 06-22-2017 at 07:07 PM.
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Old 06-22-2017, 07:09 PM   #9
mongocanfly
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Re: 68 C10 headlights stopped working ?

Vettevet..I would talk to em but I doubt they'd understand my southern talking..
need to let tim peeler ruff talk em...https://m.youtube.com/watch?v=kfQPKzelXcE

Last edited by mongocanfly; 06-22-2017 at 07:14 PM.
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