A person can find the vacuum diagram for this vehicle in its maintenance manual, and repair manual. These manuals are available at automotive part stores.
Linked is the diagram for a 1976 Cadillac DeVille, 1977 should be roughly the same...
Which vacuum diagram The Underhood for the engine or the vacuum for the interior /AC system?
You can get the vacuum diagram for the 1977 Jeep J10 from the Chilton's manual for that vehicle. You can purchase the manual in almost any auto supply store.
All vehicles come with an emissions label and a vacuum diagram. If yours is missing, the parts dept at your local Toyota dealer can get em, cheap.
http://www.autozone.com/autozone/rep...00c152801db29f
Haynes or Chilton manuals will have all of those diagrams.
go to http://www.supermotors.net/registry/media/611233
You may want to try www.autozone.com they may have the diagram for a truck of that year.
The diagram should be located under your hood on your front cross member
You may want to try www.autozone.com they may have the diagram for a truck of that year.
The best one i have every seen is "a193 clymer publications"
I can' help with a diagram. I can just suggest you do them one at a time, so as to not need a schematic.