[Diy_efi] CS Failure

[Dustin Lof]

Maybe The problem is not with the alternator, but with
the wiring between the alternator and the light bulb.

Make a test harness 
Get a 6 foot piece of speaker wire. 
on one end attatch a 194 light bulb, you should be
able to find a socket in a side marker light of and
old car.
  
on the other end   
One wire attatch an alligator clip  
the other wire.  clip the exciter wire a couple of
inches from the alternator and attatch to the harness
coming out of the alternator.  

Now route the wire inside or under the wipers,
somewhere you can see the light bulb

In this order start the engine, connect the alligator
clip to the output stud of the alternator and go for a
drive, 

if the light stays on you have just proven the
alternator is good, you have wiring problem

if the light still goes out, monitor the voltage on
the output stud of the alternator if it goes less than
12.1 when the light is off and your batt is more than
half charged than there is a problem with the wiring
between the alternator and batt.

If voltage on the output stud stays above 12.1 and the
light is out I would find a differnt vendor for
alternators


One tip for wiring is never just twist wires together
and wrap with tape, even on test harnesses, always use
crimp connectors or solder connections, if using crimp
connectors make sure you cant pull (and pull hard) the
wires out of the connector once its crimped.   wire
nuts are not good either but better than twist and
tape


If you are ever in the Brainerd MN area I woud be
happy to check it out for you.
--- Clayton Martiniuk <wildwood at aptalaska.net> wrote:

> Hello, I have an 1994 Chevy 350 that Keeps eating
> alternators for some reason. They seem to work for
> about two days and then shit out. I have a cs series
> alternator powered with one exciter/indicator wire
> at the F terminal. Looking at the indicator bulb,
> I'll start the truck, the light will go off for a
> while but turn back on intermittently. I heard that
> these years of trucks seem to have a problem. Some
> say to ground the back of the case to the batt but I
> dont see how on mine. I am probably close to duty
> cycle but no major power drains. It gets very cold
> here around -20 to -50. I am running an electric
> fuel pump. I am running an red top optima with 800
> cca. Does this Battery require special needs? Is the
> answer an larger amperage generator or am I doing
> something wrong?
> I am sick of buying alternators and no one can seem
> to figure out whats happening.
>                                                
> Thank you for your time
>                                 Clayton Martiniuk>
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