1975 passengers side headlight issue.
Thread Starter
Instructor
Joined: Feb 2011
Posts: 234
Likes: 15
1975 passengers side headlight issue.
Hi fellow Corvette lovers.
Can you give me a hand with this very frustrating issue? When you have the car running and turn the headlights on both driver and passenger sides headlight doors come up at the same time just fine. But when you turn the headlights off, the drive side closes fine and fast but the passenger side stays up for 3 to 5 seconds longer then closes. I switched relays but the issue continues. Does anyone know what cause this and or how to diagnose/test the system? (Tools needed?). Thanks.
Can you give me a hand with this very frustrating issue? When you have the car running and turn the headlights on both driver and passenger sides headlight doors come up at the same time just fine. But when you turn the headlights off, the drive side closes fine and fast but the passenger side stays up for 3 to 5 seconds longer then closes. I switched relays but the issue continues. Does anyone know what cause this and or how to diagnose/test the system? (Tools needed?). Thanks.
Race Director
Joined: Nov 2006
Posts: 13,269
Likes: 7,855
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
There is nothing wrong. Both yours go up together? Now that's rare. One goes down and then the other? That's normal.
Team Owner
Joined: Sep 2006
Posts: 31,289
Likes: 4,380
From: Westminster Maryland
Hello Rod,
Headlight problems can be pretty frustrating.
Here's a link to the 75 headlight system.
Perhaps this will help you figure out what's going on.
Regards,,,,,,
http://corvette-restoration.com/wp-c...ers/vacuum.pdf
Headlight problems can be pretty frustrating.
Here's a link to the 75 headlight system.
Perhaps this will help you figure out what's going on.
Regards,,,,,,
http://corvette-restoration.com/wp-c...ers/vacuum.pdf
Thread Starter
Instructor
Joined: Feb 2011
Posts: 234
Likes: 15
Thank you very much. Seems the activator is not holding a vacuum. Strange it was holding a vacuum for up but not down. Then after another test 15min later both up and down not holding a vacuum. I ordered a new one. Hoping this will do the trick. Thanks again!!!
