Checking solenoid S1

Fig 1: Identifying Ignition OFF

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Fig 2: Identifying Connectors

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Ignition off
Disconnect the automatic transmission connector
Connect adapter 9511505 and breakout box 9813190 to the transmission connector (transmission side)
Connect an ohmmeter between terminals #A (#A1) and #E (#A5).
The resistance for solenoid S1 resistance must be between 18 and 30 Ω.

Other information:
- To connect the breakout box to the transmission connector, see Connecting the breakout box, GM automatic transmissions
- To connect the breakout box, see Connecting the breakout box
- For information about signals, see Signal specification .
Fig 3: Identifying Breakout Box
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Fig 4: Identifying Ohms Display
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Fig 5: Identifying Shift Solenoid S1 And S2
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Was the resistance OK?