Grand Cherokee 4WD Laredo V8-4.7L (2002)
Power Interrupt Connector/Switch: Description and Operation
IOD Wire Harness Connector
Fig.17 Ignition-Off Draw Connector
IOD WIRE HARNESS CONNECTOR
All vehicles are equipped with an Ignition-Off Draw (IOD) connector that is located in a molded connector receptacle on the lower rear surface of
the Junction Block (JB) housing (Fig. 17). The JB is concealed above the molded plastic instrument panel fuse cover. Integral latches molded into
the fuse cover secure it the JB, the Body Control Module (BCM) and the 16-way data link connector tab of the instrument panel steering column
support bracket. The fuse cover can be pulled downward to disengage the latches and provide service access to all of the fuses, relays and wire
harness connectors of the JB.
Refer to Instrument Panel Fuse Cover in the index for the location of additional service information covering the fuse cover.
The term ignition-off draw identifies a normal condition where power is being drained from the battery with the ignition switch in the OFF
position. The IOD connector feeds the memory and sleep mode functions for some of the electronic modules in the vehicle as well as various other
accessories that require battery current when the ignition switch is in the OFF position, including the clock.
The IOD connector can be used by the vehicle owner as a convenient means of reducing battery depletion when a vehicle is to be stored for
periods not to exceed about twenty days (short-term storage). Simply disconnect the IOD connector from the JB receptacle. However, it must be
remembered that disconnecting the IOD connector will not eliminate IOD, but only reduce this normal condition. When a vehicle will not be used
for more than twenty days, but less than thirty days, remove the IOD fuse from the Power Distribution Center (PDC). If a vehicle will be stored for
more than about thirty days, the battery negative cable should be disconnected to eliminate normal IOD; and, the battery should be tested and
recharged at regular intervals during the vehicle storage period to prevent the battery from becoming discharged or damaged. Refer to Ignition-Off
Draw Fuse and Battery in the index for the location of additional service information covering the ignition-off draw fuse and the battery.
