F 150 4WD Pickup V8-281 4.6L VIN W EFI (1997)
P1865 - P1869: Testing and Inspection
P1866
P1866 is an information code (there is no testing for this code).
Code Description: Internal to Transfer Case
NOTE: If the DTC is stored, the transfer case cannot be shifted until the DTC is cleared and the ignition switch is cycled. Repair any other
DTC's retrieved first and re-test. Transfer Case System Concern, Repair Required. GEM activate shift motor relays and no movemnet of the
shift motor was detected from the contact plate inputs.
Refer to wiring diagrams to diagnose this circuit, See: Transmission and Drivetrain/Transfer Case/Diagrams
For complete Transfer Case diagnostic information, See: Transmission and Drivetrain/Transfer Case/Testing and Inspection