Posted by Bob on April 26, 2014 at 21:36:06 from (64.255.159.192):
In Reply to: Starter Problem posted by Stephen Newell on April 26, 2014 at 13:55:18:
Most likely, the starter has failed, o rthe brushes are bad. Let me explain...
There's 2 windings in the solenoid.
One end of each is connected to the "S" terminal.
The other end of one winding is connected to the metal frame of the solenoid. This is the "hold" winding.
The opposite end of the other (HEAVY) winding is connected to the terminal that you identify as "C", and grounds through the starter windings.
This winding draws lots of current/makes lots of magnetism and "pulls in" the solenoid. At that point, when the contacts close in the solenoid and send battery power to the starter, it is no longer effective, and doesn"t need to be, as the current through the "hold" coil is adequate to keep the solenoid "pulled in".
To test your repaired "starter assembly", with a good pair of booster cables, ground the starter frame with the (-) cable, attach the (+) clamp to the terminal you have chosen to call "B", then jumper battery + to "S" and enjoy the starter operating.
If it goes NOT operate, likely the brushes are worn out (or there"s some other failure) that interrupts the path to ground of the "pull in" winding.
THIS diagram is for another brand, but is set up EXACTLY the same as your Chevy van"s starter.
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