78 Corvette Headlight Problems
Thread Starter
3rd Gear
Joined: Jun 2018
Posts: 3
Likes: 0
78 Corvette Headlight Problems
Hello everyone, just joined the forum. Purchased my first Vette a couple months ago. It's a 78 , 25th anniversary edition. Have a few , hopefully small problems with it I was hoping I could get some help with. First problem is that the headlights will not flip up, have to manually pull them up and manually put them back down. Since both of them are not coming up does that mean that more than likely its the relay or the vacuum line filters and not the actuators? Another problem I'm having is the tacometer is all over the place, it will stay around a1k for a little bit and then jump to 5k and is all over the place. How can I fix this?
Le Mans Master
Joined: Aug 2006
Posts: 7,417
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From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Burning Brakes
Joined: Jul 2017
Posts: 1,113
Likes: 149
From: Frisco TX
Hello everyone, just joined the forum. Purchased my first Vette a couple months ago. It's a 78 , 25th anniversary edition. Have a few , hopefully small problems with it I was hoping I could get some help with. First problem is that the headlights will not flip up, have to manually pull them up and manually put them back down. Since both of them are not coming up does that mean that more than likely its the relay or the vacuum line filters and not the actuators? Another problem I'm having is the tacometer is all over the place, it will stay around a1k for a little bit and then jump to 5k and is all over the place. How can I fix this?
But do the tests that were posted by Peterbuilt above to make sure.
Last edited by LenWoodruff; Jun 22, 2018 at 07:38 AM.
Burning Brakes
Joined: Jul 2017
Posts: 1,113
Likes: 149
From: Frisco TX
I replaced the canister actuator seals and dust boots yesterday. The headlight now open like they should.
I have a lazy eye on the left headlight that may be a sticking relay. I sprayed some WD40 in the exhaust port of the relay. This may loosen up the sticking valve.
I have a lazy eye on the left headlight that may be a sticking relay. I sprayed some WD40 in the exhaust port of the relay. This may loosen up the sticking valve.
Instructor
Joined: Apr 2018
Posts: 174
Likes: 17
From: Philadelphia, PA
I replaced the canister actuator seals and dust boots yesterday. The headlight now open like they should.
I have a lazy eye on the left headlight that may be a sticking relay. I sprayed some WD40 in the exhaust port of the relay. This may loosen up the sticking valve.
I have a lazy eye on the left headlight that may be a sticking relay. I sprayed some WD40 in the exhaust port of the relay. This may loosen up the sticking valve.
