I know this is common in the d1's, But does anyone have a diagram of the vacume lines or places i should check to see if i can get this working?

 

No diagram, but start at the brake pedal, there is a vacum line coming off the brake light switch, then just follow that vacum line everywhere it goes. Double check the connections, everywhere it connects check for cracks.

 

Here you go, one a drew earlier

 

Thanks i will start chasing that out tom.