I'm trying to sort out the connections on the various vacuum lines for my recently acquired '68 427 with automatic transmission and power brakes. The correct components are present, and appear as new. I have had the headlight doors and the windshield wiper door both open and close under vacuum control, so I know that the actuators are o.k. mechanically. But I can't get them to operate properly. Does anyone have definitive answers for the following ?
1. I have used the 1968 Corvette Assembly Manual (pages H249, H255, and H260) as a reference. Are there any known errors or updates to these pages ?
2. I have verified the proper connection of the "green stripe" and "red stripe" hoses at both the windshield wiper relay & actuator and at the headlight relay & actuator. The "yellow stripe" hose starts at a middle connection of the windshield wiper relay and ends at a middle connection of the headlight relay. What exactly are its connections in between these two points ?
3. What are the subsequent connections & routing (excluding power brake and transmission) of the hose that starts at the manifold vacuum outlet ?
4. The tachometer mounted valve shows two hose connections. Is the third, open end of this valve supposed to be closed off ? If so, what is the factory method for doing this ? Also, are there supposed to be any electrical connections to this valve ?
5. The windshield wipers will move to the park positon on their own, but don't seem too interested in actually going back and forth over the windshield. Could vacuum problems be causing this ?
6. My car is missing many of the "existing clips" shown in the Assembly Manual as securing the vacuum hoses onto the fenders within the engine compartment. Are these clips reproduced, and if so, who sells them ? How do these clips attach to the fender ?
7. I notice that the driver's side headlight door opens/closes slower than the passenger side headlight door. My son notices the same phenomenon on his low mileage '82 Collector's Edition. Is there a reason for this, or is it only coincidence ?
Thanks in advance for any help that anyone can provide.
1. I have used the 1968 Corvette Assembly Manual (pages H249, H255, and H260) as a reference. Are there any known errors or updates to these pages ?
2. I have verified the proper connection of the "green stripe" and "red stripe" hoses at both the windshield wiper relay & actuator and at the headlight relay & actuator. The "yellow stripe" hose starts at a middle connection of the windshield wiper relay and ends at a middle connection of the headlight relay. What exactly are its connections in between these two points ?
3. What are the subsequent connections & routing (excluding power brake and transmission) of the hose that starts at the manifold vacuum outlet ?
4. The tachometer mounted valve shows two hose connections. Is the third, open end of this valve supposed to be closed off ? If so, what is the factory method for doing this ? Also, are there supposed to be any electrical connections to this valve ?
5. The windshield wipers will move to the park positon on their own, but don't seem too interested in actually going back and forth over the windshield. Could vacuum problems be causing this ?
6. My car is missing many of the "existing clips" shown in the Assembly Manual as securing the vacuum hoses onto the fenders within the engine compartment. Are these clips reproduced, and if so, who sells them ? How do these clips attach to the fender ?
7. I notice that the driver's side headlight door opens/closes slower than the passenger side headlight door. My son notices the same phenomenon on his low mileage '82 Collector's Edition. Is there a reason for this, or is it only coincidence ?
Thanks in advance for any help that anyone can provide.
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