[Spits] Questions about an alternator conversion

[Joe Curry]

Andrew,
Here are the things I did to convert from Generator to alternator.

1. Get yourself a 3 prong plug for the alternator.
2. The top one with the Brown/Yellow wire needs to be connected to the
Brown/Yellow wire removed from the "D" terminal of the voltage regulator.
3. The heavy Brown wire in the middle terminal of the connector and the
lighter brown wire on the lower terminal of the connector both go to the
starter solenoid connector that is also attached to the battery positive
terminal (I am assuming that you have already converted to negative ground).
4. The Brown wire that is connected from the Ignition switch to the "B"
terminal of the regulator is connected to the same terminal of the starter
solenoid as the two wires in step 2 above.

That should get the thing to work properly.

Let me know if you have any further problems.

Joe

-----Original Message-----
From: spitfires-bounces at autox.team.net
[mailto:spitfires-bounces at autox.team.net] On Behalf Of Andrew Lindeman
Sent: Tuesday, June 30, 2009 2:27 PM
To: spitfires at autox.team.net
Subject: [Spits] Questions about an alternator conversion

I recently replaced a broken generator with a Bosch alternator on my
1970 Mk. 3.  I followed the instructions on the VTR site about which
wires to tie together to eliminate the old voltage regulator, and have
the alternator itself installed and wired up.  The problem I'm having,
is that the alternator is not getting the signal to turn on.  I pulled
two wires off the back of the generator, a small brown/green wire, and
a large brown/yellow wire.  I have the large wire attached to the
battery positive lug on the alternator, and the brown/green wire
connected to the field positive.  If I jump the brown/green wire to
battery positive, the circuit starts charging.  When I take a look at
the voltage coming off the brown/green wire, I only get about two
volts.  Does anyone know what this voltage *should* be?  My multimeter
tells me that brown/green wire went to the old voltage regulator.
According to the VTR site, I tie together the small brown/green and
small brown/yellow wires from the voltage regulator box, which is
done.  Does anyone know where that small brown/yellow wire goes from
the voltage regulator circuit?  I do not have a wiring diagram.

Andy L.
Spitfires at autox.team.net
http://autox.team.net/mailman/listinfo/spitfires

http://www.team.net/archive