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Starter Motor - Feed Circuit Test

WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Make sure the battery is fully charged. REFER to BATTERY CHARGING .
  2. Carry out a battery drain test. REFER to BATTERY DRAIN TEST .
  3. Connect a remote starter switch between starter solenoid "S" terminal and the battery positive terminal.
    Fig 1: Checking Starter Motor (Feed Circuit Test)
    G06258730Courtesy of FORD MOTOR CO.
  4. Connect the Digital Multimeter positive lead to the battery positive post. Connect the negative lead to the starter solenoid "M" terminal.
  5. Place the gear select lever in Park or Neutral.
  6. Engage the remote starter switch. Read and record the voltage. The voltage reading should be 0.5 volt or less.
  7. If the voltage reading is 0.5 volt or less, Go to the STARTER MOTOR - GROUND CIRCUIT TEST  .
  8. A voltage reading greater than 0.5 volt is an indication of excessive resistance in the starter connections, the positive battery cable or in the starter solenoid. Remove the cables from solenoid "B", "S", and "M" terminals. Clean the cable connections and reinstall the cables to the correct terminals. Repeat Steps  3 through step 7.
  9. If the voltage reading is still greater than 0.5 volt when checked at the "M" terminal, move the Digital Multimeter negative lead to the starter solenoid "B" terminal and repeat step  6.
  10. If the voltage reading at the "B" terminal is lower than 0.5 volt, the concern is in the connections at the starter solenoid or in the solenoid contacts. Install a new starter motor. Refer to STARTER MOTOR - 2.0L GTDI  or Refer to STARTER MOTOR - 3.5L GTDI  or Refer to STARTER MOTOR - 3.5L TI-VCT  or Refer to STARTER MOTOR - 3.7L TI-VCT 
  11. If the voltage reading taken at the solenoid "B" terminal is still greater than 0.5 volt after cleaning the cables and connections at the solenoid, the concern is either in the positive battery cable connection or in the positive battery cable itself.
  12. Clean the positive battery cable connections. If this does not solve the problem, install a new positive battery cable. REFER to BATTERY CABLES - 2.0L GTDI or REFER to BATTERY CABLES - 3.5L GTDI or REFER to BATTERY CABLES - 3.5L TI-VCT, 3.7L TI-VCT
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