I think that if you read Bentleys instructions it states that reversing
polarity can ruin your pump.
You can go ahead and try it and let us know.

Stan Wilder

----- Original Message -----
From: "Mark Seifert" <theburnvictims@HOTMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, April 13, 2004 12:15 AM
Subject: Re: testing a fuel pump

> you can try reversing the positive and negative wires to the pump (+
to -, -
> to +) and crank the engine for a few seconds. this will make it pump in
> reverse. sometimes when the fuel pump is clogged, running it in reverse
for
> a few seconds will clear it out. if not, you can try hitting it with a
> hammer. seriously, this works too.
>
>
> >From: Matt Faust <mobytype2@YAHOO.COM>
> >Reply-To: Matt Faust <mobytype2@YAHOO.COM>
> >To: vanagon@GERRY.VANAGON.COM
> >Subject: testing a fuel pump
> >Date: Mon, 12 Apr 2004 09:50:36 -0700
> >
> >Hi all,
> >
> >    What is a solid way to test a fuel pump?
> >
> >  Here is my problem... My '84 van quit running the
> >other day.  I removed the line that exist the fuel
> >pump, no fuel.  I performed the relay test according
> >to the Bentley and it passed.  I measured the current
> >draw on the fuel pump, it read 7 A.  I removed the
> >line from the tank exit, a nice steady stream of fuel
> >poured out.  I removed the line from the exit of the
> >filter, also a nice steady stream poured out.
> >
> >   Can the fuel pump be plugged or bound somehow?  If
> >it is jammed, will it still draw only 7 amps?
> >
> >Thanks in advance,
> >Matt
> >
> >=====
> >Matt Faust
> >'84 Wolfsburg Weekender "Moby"
> >'63 Westy SO-33 Sub-hatch "Rusty"
> >
> >
> >
> >
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