Jeep 1997 Grand Cherokee Service Manual page 1284

8W - 40 - 8
DESCRIPTION AND OPERATION (Continued)
Powertrain Control Module (PCM) transmits the
data over the CCD bus.
HIGH BEAM INDICATOR LAMP
The micro-processor in the instrument cluster
switches the high beam indicator lamp ON and OFF
through a transistor in lamps ground circuit. The
Body Control Module (BCM) signals the instrument
cluster micro-processor over the CCD bus to turn the
high beam indicator ON or OFF. Circuit F75 powers
the lamp.
TURN SIGNAL INDICATOR LAMPS
Circuits L65 and L64 from the turn signal/hazard
flasher circuitry in the multi-function switch power
8W - 40 INSTRUMENT CLUSTER
the turn signal indicator lamps. Circuit L64 powers
the right turn signal indicator lamp. Circuit L65
powers the left indicator lamp. Circuits Z1 and Z2
provide ground for the lamps.
ILLUMINATION LAMPS
Circuit E2 from the headlamp switch powers the
illumination lamps in the instrument cluster. Cir-
cuits Z1 and Z2 provide ground for the lamps.
ZG