Headlight vacuum system help please

BlackRat

Well-known member
Joined
Mar 27, 2008
Messages
196
Ok I definately have a bit of work to do. The passenger side can holds both up and down preasure without leaking. The drivers side is good on the up which is the red hoes but has a slow leak on the green hose port. According to the troubleshooting guide I need to replace the seal around the plunger shaft.

Both override switches are good. as well as the check valve.

Here is where I think I have my major problem. Both relays open and close the valve smoothly when vacuum is applied to the small port at the top of the relay. However, When I block the red port off and draw vacuum on the yellow (center port) I cannot get any vacuum at all. According to the site below I should maintain vacuum. I would have thought that I would get some vacuum but it would drop quickly. However I am getting no vacuum at all. So am I right in assuming that both relays are bad since both failed this test???


http://www.corvette-101.com/relays.htm

Thanks
Wade
 
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