Starter Motor
WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The starter motor:
- is a wound field, gear reduction, 12V DC motor.
- has an integral starter solenoid.
- has an overrunning clutch in the starter drive.
It functions as follows:
- When the key cylinder turns to the START position, current flows through the solenoid pull-in and hold-in coils until the solenoid plunger is at the end of its travel. The plunger pulls the lever, which pushes the pinion to engage with the flywheel.
- The contact bridges the solenoid terminals that bypass the pull-in coil. This allows the hold-coil to keep the starter drive engaged and to pass battery current to the starter motor. The starter motor cranks the engine fast enough to start it.
- As the key returns to the RUN position, the relay cuts off current to the solenoid. The solenoid disengages the pinion from the flywheel.