Audi 90 Quattro starting problem

[Ecosse]

Hello !
I am a new member with two current Audi projects - a 1985 GT Coupe which is up and running and roadworthy and a bit of a sad 1988 90 Quattro.
I am hoping that I can get some advice - It is the 90 Quattro (a new acquisition) that is causing a bit of a headache - it will not start.
The fuel pump can be heard humming for a moment when the ignition is switched on and the engine will turn over and run for perhaps up to 3 seconds and then dies. I should add that I have been told the car has been stored for around 6+ years so it is a bit of an unknown quantity.
I am struggling to find layout diagrams for the wiring especially the auxiliary relays under the steering colum where someone seems to have removed some of the relays . I have identified the fuel pump relay on the auxiliary panel - labelled 76 but not sure what else should be there - one seems to have a jump wire plugged in. I was going to replace pump relay first .
Does anyone have a diagram / photo of the auxiliary relays ?
Any thoughts on the problem gratefully received thank you !
Cheers !