Fuel pump
 

Hi, 1995 Audi A4 B5, stalling, stuttering, low power etc, wont start after long trip. Now lately we thought we found the issue with the fuel pump so I ordered the new one, placed it in and tried to make it pump. It didnt pump anything out at all, I left the hoses open and all, nothing came out but the pump made sound. So I figured it must be the low voltage, tested both + and - for voltage drop, both wires had 10 volt voltage drop. When I do the voltage drop test only on the pump it shows over 10 volts. I am so lost now, what the heck do I do? Ive litterally tried everything. PS the pump works on battery, have tried changing relay, fuse is ok and cant find the correct wireing diagram anywhere, the wire colors are wrong.