Transfer Case
Refer to Wiring Diagrams Cell 34 (Expedition, Navigator), All-Wheel Drive for schematic and connector information.
Refer to Wiring Diagrams Cell 59 (Expedition, Navigator), Generic Electronic Module for schematic and connector information.
A4WD Vacuum Schematic
A4WD Vacuum Schematic
Table 1 — 4WD Mode Switch Input Resistances
Table 2 — 4x4 Shift Motor Relay Outputs
SECTION 308-07A: Transfer Case — General Information 1998 Expedition/Navigator Workshop Manual
DIAGNOSIS AND TESTING
Procedure revision date: 05/06/2002
Special Tool(s)
Digital Multimeter
418-F082 (105-R0005)1 or equivalent
New Generation STAR (NGS) Tester
418-F048 (007-00500) or equivalent
Vacuum Pump
416-D001 (D83L-7059-A) or equivalent
Mode Switch Position Resistance (Ohms)
2WD 3700-4100
A4WD 1400-1600
4WD HIGH 645-715
4WD LOW 225-255
1998 Expedition/Navigator Workshop Manual
http://www.fordtechservice.dealerconnection.com/pubs/content/~WSWJ/~MUS~LEN/21/