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Old 20th August 2012
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2007Low 2007Low is offline
Senior Chief Harley Engineer 2nd Class
 
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Quote:
Originally Posted by Yellowstone Kelly View Post
The problem here is that with only the solenoid body and a socket, you can't fully test the operation of the solenoid. You can only test the pull-in and hold-in coils. Without the battery connected and the plunger installed, you can't tell if the solenoid is shorting the two large studs together internally to apply a lot of current to the starter motor, which is the solenoid's job.


To test the pull-in coil:

1. Connect ve - to short, large stud of the solenoid.
2. mometarily apply +12 volt jumper wire to small terminal. Socket should pull in. Leave it pulled in to test hold-in coil


To test hold in coil:

1. Move ve - wire from short large stud to solenoid case.
2. apply +12 volts to small terminal. Try to pull the socket out of the solenoid. The hold-in coil should resist your effort to pull the socket out while +12 volts is applied to the small terminal. Remove the +12 volts from the small terminal, and the socket should slide easily back out of the solenoid.


That's all you can test using just the soleoid body, a battery, jumper wires, and a socket.
You could load test the contact plate of the solenoid by connecting a lamp between the battery term of the solenoid and the positive term of the battery. The contact plate will conduct battery negative through it to the lamp. Using a headlight would do a pretty good job of it.
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