Alternator differences

[radek at uniserve.com]

Thanks guys.  The original alternator on the van lasted 20 years, all  
I had to do was periodically install new brushes.  About three years  
ago I had to replace it because the rebuild shop wouldn't work on it -  
too rusted.  So, the replacement was still shiny when it failed.  I  
took it to the rebuild shop and swapped for a new one - all is good  
for know.  I wonder how long this one is going to last - the van is  
slowly losing its German origins and becoming Chinese!

What was puzzling for me were the extra connectors on the newer  
alternators.  It turns out L goes to the indicator lamp, DFM goes to  
the ECU.  Since the van does not support a ECU connection, it can be  
left out.  So, to answer my original question, the newer Jetta  
alternator should fit the van.
In the process of researching this, I came across a reference table  
entitled "Alternator Voltage Regulator Terminal Designations" which  
lists equivalents from different manufacturers.  For example, what  
Bosch and Valeo mark as DFM, is FR at Delco and Ford.  If anyone is  
interested, I can email you the table directly.
Thanks.

Radek.
88 90Q
91 V8Q 5-sp
93 EV

> Message: 1
> Date: Tue, 7 Jul 2015 22:47:22 +0000 (UTC)
> From: Peter Orban <orbanp1 at yahoo.com>
> To: "quattro at audifans.com" <quattro at audifans.com>
> Subject: Re: Alternator differences
> Message-ID:
> 	<1114988009.752578.1436309242386.JavaMail.yahoo at mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
>
> Hi Radek,
> Do not overlook the fact that there could be enough corrosion  
> between the alternator metal components that would impede the flow  
> of electricity.
> Every sub-component of he alternator on my son's car was fine,  
> except where the rectifier block was bolted to the alternator frame  
> there was enough corrosion for the alternator not to work  
> correctly.Similarly, on his starter the ground "did not get" from  
> the front of the starter where it is bolted to the bell housing to  
> the end plate of the starter where some of the brushes are grounded.  
> The ground current eventually went through the bearings (sintered  
> bushings) and the shaft of the starter, ultimately destroying the  
> bushes.
> What I am saying is that take every bolted connection apart on the  
> alternator where electricity is supposed to flow, clean the mating  
> surfaces, apply some dielectric grease, and reassemble, assuming  
> that all the components are otherwise fine.
> PS. We live in the rust belt.
>
> Good luck, Peter
>     Message: 1
> Date: Mon, 6 Jul 2015 22:47:16 -0700
> From: Tihol Tiholov <t.tiholov at gmail.com>
> To: "quattro at audifans.com" <quattro at audifans.com>
> Subject: Re: Alternator differences (Radek)
> Message-ID:
>     <CAFgi7AZ=LgMUBRVGv1s2NWP2--m7mWpvthgtKChKX=K7AJzLhg at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
>>
>> From: "Radek" <radek at uniserve.com>
>> To: <quattro at audifans.com>
>> Subject: Alternator differences
>> Message-ID: <C97B0D45CF0F467DB299316122819C59 at Compaq>
>> Content-Type: text/plain;      charset="iso-8859-1"
>>
>> Obligatory Audi content:  5-cyl in my Eurovan.
>> The alternator in my 93 EV is not charging, even though brushes are ok.  I
>> have a spare alternator for my daughter's 04 Jetta - it's physically
>> identical and fits the EV; however, there is a slight difference in the
>> electrical connections.  The main charging wire connector is the same - a
>> post with 13mm nut on it.  The small connector, though, is different:  a
>> single blue wire on the EV, two black wires on the Jetta.  When I look at
>> the broken EV alternator, there is a double connector on it as well, but
>> only one wire goes to it.  On the Jetta, two wires go to the connector.
>> Can I swap the alternators?  BTW, the Jetta alternator has letters L DFM
>> next to the small double wire connector.
>> Thanks.
>>
>> Radek
>> electrically challenged
>>
>
> Before swapping alternators, you could check the diode couples in the '93
> alt. I went to a shop and and had them changed - all's been well since. Huw
> would probably give you all the details
>
> --
> Tihol
>
>
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