How do you change a fuel pump in a 1988 5000 audi turbo quattro and how do you check to see if it is a fuel b

would also like to know the color codes for the wiring to the fuel pumpHow do you change a fuel pump in a 1988 5000 audi turbo quattro and how do you check to see if it is a fuel bI believe those audis had the fuel pump inside the gas tank. If it does, then you have to remove the back seat and you'll find a small door you have to remove to get at it.