[V8] V8 Starter Question

[Jeff Goldberg]

>From the drawing on page 27-100-1 When Terminal 50 is energized by 12V from
the ignition switch the solenoid relay closes and current travels from
Terminal 30 (Battery) to the starter armature.  Grounding the armature would
result in a dead short of the battery Terminal 30 every time you turn the
key.

-----Original Message-----
From: v8-bounces at audifans.com [mailto:v8-bounces at audifans.com]On Behalf
Of Stafford, Kenneth A.
Sent: Tuesday, June 28, 2005 10:45 PM
To: v8 at audifans.com
Subject: [V8] V8 Starter Question


Been doing some much needed long term maintenance on my V8 (attack front end
engine idle rattle, replace leaking bomb, replace front strut bearing, fix
leaking dizzies, etc).  Discovered a very loose T-belt that appeared to be
causing the diesel-racket sound at hot idle.  Turns out the tensioner pivot
bearing was seized and the tension block pretty much worn out.  Did a bunch
of other stuff including changing the starter (the planetary plastic bits
were broken up inside).  Long story short, after starting the car up well
for
a half dozen times (nice--no rattling or leaking any more!)--the starter
then
refused to turn the engine over--there was some clicking coming from the
solenoid.  I suspect that I may have a poor signal path to the starter.  But
here is the rub...looking at the PDF manual page 27-100-1, it seems as
though
there is an error.  The illustration has a #2 arrow identified as pointing
to
Term 50 which is actually Term 15 (unused from what I can tell).
Furthermore
I am now thoroughly confused by how the system is even supposed to work.
The
solenoid is actually wired in parallel with the motor armature.  And if I
assume that the starter signal source (from the ignition switch ) is at +12
V, then the instant the motor contacts are made in the solenoid, the voltage
across the solenoid coil would effectively go to zero.  In fact, the
trouble-shooting guide on page 27-100-1 says that when cranking you should
see at least 8 V at Term 50 (one end of the solenoid coil) and at least 8 V
at the armature side of the starter motor--the armature is tied to the other
end of the solenoid coil--meaning that you could have 0 V across the
solenoid!  How is that supposed to work?  I am tempted to cut the conductor
from the solenoid coil to the armature terminal and instead run it to
ground.
What say you wizards??

TIA,
Ken
'91V8Q, 200+K

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