I've pulled the 105/115 no go and checked the pressure switch still no go.

Just happen to have a Bosche 20/30A relay with a socket and wires coming out of it.

The terminals are: 85-one sideof coil,
86 other side of coil,
30, one side of switch Usually +12
87 other side of the switch norm. open.
87a switch norm.closed-rest postition
So if I understand you,

#1. wire 85 to 87 together put a bullet on it.
#2. Put a bullet on 86.
#3. Put a bullet on 30

I just need to be clear on what terminals on the Bosche relay go to the appropriate socket recepticles in your diagram i.e., 1,2,3.

Keep it coming I think we'll make progress here.

__________________
1986 SDL
My Other Car is a Porsche. When it stops leaking, I'm out of oil.