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Pontiac of the Month

onetrick56's 1964 Grand Prix

2020 September
of the Month

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Hello !

There's a small hissing sound, indicating a vacuum leak at one of the vacuum ports of the headlights switch. It disappears when I turn the lights on (and the vacuum activates the curtains in front of the headlights). I thought it was the rubber L-Shape connector from the vacuum lines to the switch but even when I plug the vaccum line into the port directly it still leaks (a little bit less though). I replaced the switch 6 months ago...

Any idea ? I think the car's going to be OK other than the annoying hissing sound, right ? Anything you suggest I do with the switch ?

 

Thanks !

 

Etienne

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  • 4 weeks later...

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You might try some heat shrink on both end of the vacuum lines, also inspect the vacuum hoses for cracked or damaged ends.

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