How do i know which fuel pump?

[sciroccos at earthlink.net (Jim Ruffi)]

>From my recent experience, I found the main pump to have more potential for
loud noise.
Just unplug the in-tank pump while it's running/noisy and you'll know..

eh?

>-----Original Message-----
>From: scirocco-l-bounces+sciroccos=earthlink.net@scirocco.org
>[mailto:scirocco-l-bounces+sciroccos=earthlink.net@scirocco.org]On
>Behalf Of C Boyko
>Sent: Saturday, November 12, 2005 5:12 PM
>To: scirocco-l@scirocco.org
>Subject: How do i know which fuel pump?
>
>
>Okay, let's say this is my 16V (It's the Cabby, still). So I pop hatch #1
>under the back seat, and I can hear the transfer pump, but it's more of the
>same "wizzle" sound. I changed the main fuel filter, and there is no crud
>either in the tank or in the screen to the transfer pump. So now what do I
>do? I've buttoned it back up and will work on a few other projects till I
>know what to do next, one or both of these fuel pumps is most likely toast,
>the question is, which?
>Would the sound get transferred up to the tank? It's much louder in the car
>with the seat out. (I'm hoping  the in tank pump's the bad one.....the
>other will be a real bitch to change I'm sure)
>
>Thanks for you reply eh?
>cathy
>
>