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C3 headlights



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mickeywick

Club Member

Tue 02 Jan 18 18:27

C3 headlights


my right-hand headlight comes up after i park the car. I can push it down again but why does it come up in the first place.
One problem is, of course, I can't see whether it is up or down when I'm actually driving the car - any ideas?
Mike Annett, Horley, Surrey



Last edited by mickeywick on Tue 02 Jan 18 18:27; edited 1 time in total. [1 %]
--------------------
Mike A

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kentvette

Club Member

Wed 03 Jan 18 11:31

Re: C3 headlights


I think you'll find this is a vacuum issue. I believe that the front chassis tube is the reservoir for the "hold down" aspect of the lights. As only one is coming up, I suspect you have a leak in a vacuum hose. I have been fortunate to have avoided this little gremlin, so am not a great expert, but no doubt someone on here will confirm or deny my thoughts!


--------------------
Stephen J Irons
CCCUK Lifetime Member
Corvette Club France
Corvettes of Southern California
NCM Family Member
Stephen & June's Web Site
Red Corvettes Have More Fun!

Apple IS Genisys!
The "Born-Again Greenies" are killing the planet! It's time to wake up and smell the rain-forest burning!

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mickeywick

Club Member

Thu 04 Jan 18 09:31

Re: C3 headlights


I've had another look and the headlights come up alright but only the left one goes down..
Does anyone know if the 'dipswitch' operates the headlights by vacuum or electrically
The stalk operates the wipers, screen wash etc. and it's suppoed to dip the headlights.
Mike


--------------------
Mike A

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kentvette

Club Member

Thu 04 Jan 18 11:21

Re: C3 headlights


The "dipswitch" would operate electrically, just switching to the dip beam of the sealed beam units (and switching off the single element main beam unit.

I don't know what year you have, but on the 78 the dipswitch "stalk" does only that and the indicators. But's quiet a pull to operate the dip and its a "toggle" type, so it clicks back and you pull it again to go back to main...

The raising of the lamp doors is vacuum operated. It sounds as though you have a hose leak or a bad actuator.


--------------------
Stephen J Irons
CCCUK Lifetime Member
Corvette Club France
Corvettes of Southern California
NCM Family Member
Stephen & June's Web Site
Red Corvettes Have More Fun!

Apple IS Genisys!
The "Born-Again Greenies" are killing the planet! It's time to wake up and smell the rain-forest burning!

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eurovettes

CCCUK Supporting Vendor

Fri 05 Jan 18 18:01

Re: C3 headlights


A good "do the simple stuff first" tip would be to cut 1/4" off the ends of all the he
l/ vac hoses and refit - this means you get fresh rubber fit.
Remember also that you vette may have the manual h/l overide operation switch under the middle of the drivers dash - this may also be leaking.

I get occasionally on my 80 under hard accel Smile a lift up of my rh h/l - I put this down to excessive vaccum and possibly leaking actuator boot - not annoying enuf for me to fix it

I just love the roar of WOT !!!!!

cheers
keith

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Daytona Vette

Club Member

Fri 05 Jan 18 18:07

Re: C3 headlights


AS said above a Vacuum Issue



Last edited by Daytona Vette on Fri 05 Jan 18 18:08; edited 1 time in total. [2 %]
--------------------
Barry - Daytona Vette

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curious bystander

Committee Member

Fri 05 Jan 18 19:21

Re: C3 headlights


https://www.youtube.com/watch?v=hoQ-yKzc3wo

Some of this is a bit hard to follow but it does show all the components.

The over ride switch mentioned is under the dash near the steering column.

If every part mentioned in this video looks "well worn", including the rubber hoses it could be time to replace everything

Replaced the lot on mine - now works a treat Thumbs up


--------------------
79 L82 Auto

Having a lot of bhp is all very well, but on these forums it's torque that counts

Events Co-ordinator

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eurovettes

CCCUK Supporting Vendor

Fri 05 Jan 18 19:39


great video - I actually learned from it - another little job for my 80 - no off to buy a mighty vac

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