Pinpoint Tests - OSC Equipped Vehicles: P1781: Testing
WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, 2004 Ford Excursion, and 2004 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
RERUN on-board diagnostics and cycle switch. REFER to FOUR WHEEL DRIVE SYSTEMS - EXCURSION & F250-F550 SUPER DUTY PICKUP and TRANSFER CASE - EXCURSION & F250-F550 SUPER DUTY PICKUP for transfer case concerns.