F 350 4WD Pickup V8-7.3L DSL Turbo VIN F (1994)
Neutral Safety Switch: Description and Operation
With 4R70W and E4OD Transmissions
PURPOSE
With the transmission in "REVERSE", the manual lever position sensor directs current to illuminate the backup lamps.
With the transmission in "PARK" or "NEUTRAL", the manual lever position sensor directs current to close the starter motor relay.
