68 pontiac gto hide away lights - Pontiac GTO Forum
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post #1 of 3 (permalink) Old 06-05-2019, 10:22 PM Thread Starter
 
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68 pontiac gto hide away lights

Hi,


i have a 68 gto and i installed new lines ,new pumps , new valves and new headlight switch
and the lights open but don't close. If i swap the line close works but open does not.
I use a smoke machine and i have a leak on a brand new light switch
this is the second switch and same leak any ideas?



Thanks
quique69 is offline  
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post #2 of 3 (permalink) Old 06-08-2019, 10:50 PM
 
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I cant help you with any ideas, as you have confirmed a leak somewhere in the system.

I am fighting with myself whether to retain the old vacuum system(for originality) or install the electric system........

The electric system doesnt require as much `vacuum-fiddling`.....

No worries...I hope you can solve your problem.
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post #3 of 3 (permalink) Old 06-09-2019, 03:07 PM
 
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We had the same issue on our 69 hideaways about 4 years ago during restoration. We had a new pump that leaked and multiple bad (leaking) brand new switches. We replaced the pump and kept returning the vacuum switches until the supplier sent one that would seal. A lot of time wasted on that issue thinking we had something hooked up wrong. I feel your pain! In the end my mechanic may have used some silicone to help seal the switch too. I will ask him what he remembers. You're on the right track.
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