68 RS Headlight Door Demons - Team Camaro Tech
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post #1 of 7 (permalink) Old Jan 31st, 10, 05:45 PM Thread Starter
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68 RS Headlight Door Demons

so one of my headlight door actuators quit, and I replaced it with a new one and all was working perfectly. The doors open perfectly, but now, all of the sudden, when I shut off the headlights, the doors start to close, but stop about halfway and then return to the full open position. If I push up the RPMs, then the doors close properly, but they will not close at idle. any thoughts?
68 RS/SS 350
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post #2 of 7 (permalink) Old Feb 14th, 10, 05:37 AM
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Re: 68 RS Headlight Door Demons

I am having problems with y doors too, with some help from these forums I have determinend that the brown wire from under the dash shouwl be energized when the ligt switch is pushed in, and the blue wire when its out, I would check to make sure you have that first, then see if your battery is fully charged, I am in the middle of trying to figure out my problems and discovered that a bad/low battery creates lots of random problems....seems like you either have a low bat or maybe you are geeting power from the voltage regulator/alternator for the close circuit, that would explain why they kick in with rpms, the alt is probably putting out 10-11 volts at idle and 13+ as you run it up... check those items
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post #3 of 7 (permalink) Old Feb 14th, 10, 05:40 AM
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Gary
 
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Re: 68 RS Headlight Door Demons

oh, sorry, just realized you are working on a 68 vacum system, never mind, you need to find out how much vacuum is supposed to be supplied on the close circuit, check to see you have that, did you chnge the intake manifold/carb?
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post #4 of 7 (permalink) Old Feb 14th, 10, 08:04 AM
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Re: 68 RS Headlight Door Demons

probably leaks in the vac lines. Use dish soap and water and dabble it on all the connections, t's, etc. and see if there is a leak. Dont forget the light switch has hose bibs on it too, check ALL hose connections and the valve on top of the Vac Can. Mine work great with new hoses and actuators.

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post #5 of 7 (permalink) Old Feb 16th, 10, 08:39 PM
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Re: 68 RS Headlight Door Demons

Is the manual valve fully in the NORMAL position?

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post #6 of 7 (permalink) Old Feb 24th, 10, 12:04 PM Thread Starter
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Re: 68 RS Headlight Door Demons

I finally exorcised my demons... I checked all of the hose ends, in-line check valve, vacuum at all places and everything was perfect. I had to take off the valve on the vacuum tank and thoroughly lubricate it with silicone lubricant. I sprayed it all over the inside, shook it, tapped on it, etc.... now both doors work like a charm! Thanks for all of the ideas.
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post #7 of 7 (permalink) Old Feb 24th, 10, 12:43 PM
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Re: 68 RS Headlight Door Demons

vacum leak for sure


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