Radio wiring

[Silver Square]

Anybody have a wiring diagram for the radio in a '77? My truck has no radio now, and the wiring has already been cut so I can't just get an adapter. Thanks.

 

[Jgonick]

Wiring manual LINK

20-YEL-43 power
18-BLK-150C ground
20-GRA-8C illumination

On page 1 top to the right. You can trace them out with the wiring diagram. (attachment shows what you are looking for on the diagram)

 

[Silver Square]

Thanks!