How do you changing the dash light bulb on a 1983 Porsche 928s?

SOURCE: Fuel pump not getting power 1985 928s porsche

chck out this site, it has free diagrams etc in pdf format:-
http://www.onlinefreeebooks.net/automotive-machinery-power-equipment-ebooks/porsche/wiring-diagram-porsche-type-928-s-model-89-pdf.html

Your problem can also be with the Bosch ECU, these are prone to failing and also control the fuel pump, they can however be rebuilt.

SOURCE: how do I replace dash light bulbs 1983 firebird

you have to pull the dash out the globes are in the back

SOURCE: where is the fuel pump on a porsche 928s

Hi,
You should find an inspection cover under the carpet in the boot with wires going through or near it it should be held with 3 srews/bolts,if you carefully remove this you will find the fuel pump and tank sender unit by carefully removing this up you will find the fuel pump (in tank pump)

SOURCE: Porsche 928s 1985 starter motor removal

Sorry you will have to remove the swaybar

SOURCE: 1965 PORSCHE 928s headlight wiring

brown is ground, i do know that for sure.