TEST OR INSPECTION
If wire 1640 (black) cannot be identified at door switch, measure continuity across switch
from terminal wire 1609 (gray) to both black wire terminals.
Continuity should be measured between terminals, when switch is closed (door switch is
Check for continuity across crew cab door or crew cab roof hatch switch between
terminal wire 1609 (gray) and terminal wire 1640 (black).
If there is continuity, repair wire 1640 in rear body wire harness if
repairable (TM 9-2320-325-14&P), or replace rear body wire
harness (WP 0461).
If there is no continuity, replace door/hatch switch (WP 0385).