Hello all. New here. I have some type of issue with air injection. The sys. looks good as far as the vacuum lines go. I ran power to the pump and it's working but with the engine cold there is no power to the pump. It does seem to come and go so most likely the relay for the pump. My issue is I cant locate it in any diagrams and no label in the fuse/relay boxes. Any ideas?

TIA

 

Location R6. Marked as glow plugs for diesels.