Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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#407377 04/30/18 10:06 PM
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pottejo Offline OP
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You've probably discussed this many times but I have been unable to find the thread..My lights work, there just too dim to see where your going. I've checked all the connections several times, and I can't find anything wrong with them. I' have tried regular headlight bulbs and Halogen bulbs. They both look about the same. I'm beginning to think that I'm just not getting a good enough ground. Any suggestions.

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pottejo #407379 04/30/18 10:32 PM
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Most likely the problem is the ground. It limits the flow of electric current and therefore the brightness of the bulbs.


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pottejo #407380 04/30/18 10:37 PM
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Here are some quick ideas to consider.
- Measure the voltage available at the light bulb socket. There could be high resistance upstream of the socket. Compare it to voltage at the battery.
- Measure the resistance between the inside diameter of the socket and a known good ground.
- Check out this thread. https://vccachat.org/ubbthreads.php/topics/407021/dim-lights-and-poor-signal-power.html#Post407021
- Do an Advanced Search for posts with both the words "dim" and "light".


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pottejo #407382 04/30/18 11:07 PM
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Test - run a ground wire from the battery neg. post to the head light and see if it makes the light brighter.


Gene Schneider
Chev Nut #407451 05/02/18 10:44 AM
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pottejo Offline OP
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Thanks, I ran a wire from the battery to the headlight bucket. There was some improvement be not much. So, I cleaned the ground lead from the battery to the transmission. Not sure, if it made much difference. Too bad there's not LED or some other kind of bulb that will put out more light.

pottejo #407457 05/02/18 03:11 PM
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You may be expecting too much from the 1937 head light.
The reflector must be in perfect condition....have a 32-32 candle power bulb....generator putting out 7.2 volts or more...clean grounds....and a good battery.

With all of that the light level will be far less than what we have had in the last 65 years.


Gene Schneider
pottejo #407458 05/02/18 03:13 PM
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Have you checked your headlight reflectors to see if they need re-silvering? If the reflectors are badly tarnished you might want to look at having them re-coated with vacuum sealed aluminum which will make the reflectivity about 95%.

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pottejo #408585 05/23/18 10:41 PM
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I put 32 / 50 CP bulbs in my 31 Chev's headlights. You might have to buy them from the Model A parts dealers.


My Chevy is over 70 years old and still running great. I hope I keep running cuz I just turned 81 !!

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