Fuel Pump wires charred on 1990 Audi 100

[David Glubrecht]

charred wires on an Audi often point to a high resistance connection.
If it is away from a connection, then look into amperage.
I have had a fuel pump that was very noisy and continued to run until it 
siezed and broke the drive tabs internal to the pump and still did not blow 
the fuse.
   Dave G



----- Original Message ----- 
From: <cobram at juno.com>
To: <capnkidd at sbcglobal.net>
Cc: <quattro at audifans.com>
Sent: Saturday, September 24, 2005 7:26 PM
Subject: Re: Fuel Pump wires charred on 1990 Audi 100


> "Jim Jordan" <capnkidd at sbcglobal.net> writes:
>
>> I stumbled onto a 1990 Audi 100 that is not operating because the
>> fuel pump apparently failed while being driven.
>
>> the insulation on the wires was charred
>
>> Any ideas why this would happen?  Would a fuel pump seize and draw
>> enough current to burn the wires before a fuse popped?
>
> I've seen this happen on a dorF Ranger, pump was evidently seizing at
> just the right amperage and time cycle to not blow the fuse, but enough
> to get some whiffs of smoke coming out from under the dash....took a
> while to put 2 + 2 together (which on a Ford adds up to 3 BTW.)  I'd
> still check for chaffing of the wire somewhere too, just in case.
>
> BCNU,
> http://www.geocities.com/cobramsri/
> Hamburgers. The cornerstone of any nutritious breakfast.
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