Grand Cherokee 2WD L6-4.0L VIN S (1997)
Driver/Vehicle Information Display: Description and Operation
Graphic Display Module
Description
A Graphic Display Module (GDM) is standard equipment on all four-wheel drive Grand Cherokee models, unless the vehicle is equipped with the
optional Vehicle Information Center (VIC). The GDM is mounted in the lower center stack area of the instrument panel, above the ash receiver and
below the climate controls. Two-wheel drive Grand Cherokee models have a storage bin installed in place of the GDM as standard equipment.
The GDM display consists of a back-lit screen with a vehicle outline. The two rear wheels of the vehicle are illuminated by a lamp when the transfer case
is engaged in any two-wheel drive operating mode. The two front wheels are also illuminated when the transfer case is engaged in any four-wheel drive
operating mode.
The GDM also has up to three indicator lamps, which indicate whether the four-wheel drive mode selected is Lo, Part-Time, or Full-Time. The number
of operational indicator lamps may vary, depending upon the optional four-wheel drive transfer case in the vehicle. A switch on the transfer case is
hard-wired to the GDM to illuminate the proper wheels and indicator lamps.
The GDM bulbs and the transfer case switch can be serviced. However, if any other part of the GDM is damaged or faulty, the entire GDM must be
replaced.
Circuit Operation
CIRCUIT OPERATION
Several fuses supply power to the Graphic Display Module (GDM). When the ignition switch is in the RUN position it connects circuit A1 from
fuse 8 in the PDC to circuit A22. Circuit A22 feeds circuit F83 through fuse 6 in the junction block. Circuit F83 supplies voltage to the GDM.
Circuit A7 from fuse 15 in the PDC powers circuit F60 through fuse 20 in the junction block. Circuits A7 and F60 are HOT at all times. Circuit
F60 feeds the GDM. Circuits Z1 and Z2 provide ground for the GDM.
