Dim Headlight - Chevelle Tech
Electrical & Wiring Troubleshooting electrical problems.

 
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post #1 of 9 (permalink) Old Feb 13th, 14, 5:23 PM Thread Starter
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Scott
 
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Dim Headlight

I have nice and bright lights on the right side of my '70 SS but the inner left side light is out completely and the outer is much dimmer then light on the right side. Any ideas where i should start? Also there is a white wire attached to what looks like a capacitor bolted to the on voltage regulator, that wire is hanging on by a thread on the clip side. What does it do and any ideas on how to get another one?

Thanks as always
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post #2 of 9 (permalink) Old Feb 13th, 14, 6:15 PM
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Mike
 
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Re: Dim Headlight

Sounds like a poor ground.
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post #3 of 9 (permalink) Old Feb 13th, 14, 7:07 PM
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Re: Dim Headlight

And or a badly corroded high beam terminal. Check and clean all of the connections.

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post #4 of 9 (permalink) Old Feb 14th, 14, 11:08 AM Thread Starter
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Scott
 
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Re: Dim Headlight

Thanks, any idea on the Voltage Regulator?
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post #5 of 9 (permalink) Old Feb 14th, 14, 11:22 AM
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Re: Dim Headlight

Bad ground or a bad bulb or try swapping out the bulb and test it.

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post #6 of 9 (permalink) Old Feb 14th, 14, 11:58 AM
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Re: Dim Headlight

Quote:
Originally Posted by 1970 LS6 View Post
Thanks, any idea on the Voltage Regulator?
Noise supressor for the AM radio. Won't affect charging. They are ALMOST the same as the one in the distributor.
It's called a capacitor.


http://www.ss396.com/part/GRC-12834.html ouch .

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post #7 of 9 (permalink) Old Feb 14th, 14, 6:48 PM Thread Starter
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Re: Dim Headlight

Thanks Levon that is what I thought is was. I see one for sale in the NPD catalog.
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post #8 of 9 (permalink) Old Feb 14th, 14, 8:32 PM
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Dave
 
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Re: Dim Headlight

My left side lights were dim also. First I checked the voltage at the inside ( two post) headlight with a voltmeter, set the meter to DC volts and connecting one lead to the negative - post of the battery and the other to one side of the headlight (on head light itself, not plug). Meter read battery voltage, 12+ volts approx. Next I connected meter to the other terminal on the same lamp, meter read battery voltage. This told me headlight was good and getting voltage but was not being grounded. I found a broken ground wire which connected both lamps on that side to ground. Hope the helps. Ground was laid under one of the voltage regulator mounting screws. My not be correct but that was where it was landed on my 70.
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post #9 of 9 (permalink) Old Feb 15th, 14, 12:19 AM
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Re: Dim Headlight

Do a continuity test with DVM, set it X1 ohm and check the black wire from each headlight socket to the ground lug. It should read zero ohm. If read "0", Then either have a poor ground or a loose connector.

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