Econoline E550 V10-6.8L VIN S (2003)
Starter Relay: Description and Operation
The starter motor solenoid relay switch:
^
controls current to the starter solenoid.
^
is engaged by the ignition switch.
^
connects the battery to the starter motor. The TR sensor on automatic transmission-equipped vehicles prevents starter motor engagement unless the
transmission is in the NEUTRAL or PARK position.
