When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
You purist may throw me out for asking this but: When I got the 73, the previous owner, had converted the headlights to electric. They worked at first with the right one being sporadic. Now the control mod just clicks about every 10 seconds and no movement. Is there any way I can test to determine if the mod is bad? From what I can tell the conversion came from mid 90s Trans-am.
Hmmm... Perhaps that's why the Chevy Engineers decided to dump the electric C2 headlamp system for the less expensive & more reliable vacuum operated system.
Hmmm... Perhaps that's why the Chevy Engineers decided to dump the electric C2 headlamp system for the less expensive & more reliable vacuum operated system.
And maybe that is why a recurring theme on the C3 Forum is malfunctioning headlights.
In the GM of yesterday stuff was supposed to work for the first 12,000 miles so no warranty repairs. Then you were supposed to buy a new one. As a demonstration of GM's "engineering to a low cost" I will simply point out the Vega as an example, with both the engine block and body rust problems.
It took the Germans and Japanese to finally teach GM (and Detroit) that durability and quality was more than sticking another chrome strip on the new model.
I used Miata motors to work my headlights and they continue to work perfectly, without maintenance.
Last edited by Rotonda; Mar 5, 2018 at 05:17 AM.
Reason: Addition
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
I like the crudeness of the vacuum system, its design and the hiss and thunk of them working, but would prefer the reliability of electric. I just had to go through my system because the 2 year old light switch lost its vacuum seal. crappy chinese repops. I hope this lectric limited one is higher quality.
And maybe that is why a recurring theme on the C3 Forum is malfunctioning headlights.
In the GM of yesterday stuff was supposed to work for the first 12,000 miles so no warranty repairs. Then you were supposed to buy a new one. As a demonstration of GM's "engineering to a low cost" I will simply point out the Vega as an example, with both the engine block and body rust problems.
It took the Germans and Japanese to finally teach GM (and Detroit) that durability and quality was more than sticking another chrome strip on the new model.
I used Miata motors to work my headlights and they continue to work perfectly, without maintenance.
I guess my 78's are mutants...totally stock, 40 years old in Oct 2017, never been touched since new except changing the 4 headlights to Hella Euro Haolgens, same hoses, same electric dashboard switch, same everything, 100% original, and work PERFECTLY AND COUNTING.......AND I beat the 12,000 mile warranty...coming on 70,000 miles.
There are lots of things to improve on the C3, but I would not count electric headlights necessarily an improvement..........................
Hmmm... could you explain which part(s) you used and the mods needed? I had to buy Wagner's H5006 and H5001 from summit for my car as I couldn't figure any bulb available in Europe for it.
You purist may throw me out for asking this but: When I got the 73, the previous owner, had converted the headlights to electric. They worked at first with the right one being sporadic. Now the control mod just clicks about every 10 seconds and no movement. Is there any way I can test to determine if the mod is bad? From what I can tell the conversion came from mid 90s Trans-am.
Try to manually raise the headlights by turning the ****. They should turn smooth and easy.
If not- it's more than likely a bad motor- bearings- brushes- water damage.
And if the motor was tough to turn- it might have torched the module as well-see below.
If they turn smoothly- might just be the module.
Fiero and Firebird modules will work- however the later ones are better (see below- green board)
A lot of us have used later technology-as the Firebird was controlled by current sensing. The newer(93-97) Ford Probe and Mazda Miata motors- have switching and control all internally- no extra modules. These things are bulletproof.
Originally Posted by 7T1vette
Hmmm... Perhaps that's why the Chevy Engineers decided to dump the electric C2 headlamp system for the less expensive & more reliable vacuum operated system.
Hmmmmm- I think Rube Goldberg was working for Chevy at that time... Chevy engineers dumped the vacuum for the C4 and C5...
Originally Posted by jb78L-82
I guess my 78's are mutants...totally stock, 40 years old in Oct 2017, never been touched since new except changing the 4 headlights to Hella Euro Haolgens, same hoses, same electric dashboard switch, same everything, 100% original, and work PERFECTLY AND COUNTING.......AND I beat the 12,000 mile warranty...coming on 70,000 miles.
There are lots of things to improve on the C3, but I would not count electric headlights necessarily an improvement..........................
Hmmm... Perhaps that's why the Chevy Engineers decided to dump the electric C2 headlamp system for the less expensive & more reliable vacuum operated system.
ThAt's funny. After GM fired Rube Goldburg, they went back to electric, and now I don't think they use vacuum for anything.
To be fair, that is no ordinary car, but one of the finest restomods on this forum. I don't think GM ever envisioned a vacuum solution to the backup lights that worked like this: