Abs Warnin Lamp; Stop Lamp Switch Input; Data Link Connector - Jeep Wrangler 1997 Manual

8W-35- 2
DESCRIPTION AND OPERATION (Continued)
valves and outlet valves in the hydraulic control unit .
The hydraulic control unit contains three separate
inlet valves and three separate outlet valves . The
Controller, Anti-Lock Brakes (CAB) activates the
inlet and outlet valves by providing separate ground
paths for each.
The CAB provides a ground path for the rear inlet
valve on circuit B251. For the right front inlet valve,
the CAB provides a ground path on circuit B249 . On
circuit B245, the CAB provides ground for the left
front inlet valve .
The CAB provides a ground path for the rear out-
let valve on circuit B254 . For the right front outlet
valve, the C
provides a ground path on circuit
B248. On circ it B243, the CAB provides ground for
the left front utlet valve.
ABS WARNIN LAMP
Circuit G5 from fuse 10 in the fuse block provides
power for the
S warning lamp in the instrument
cluster. Ground for the ABS warning lamp is pro-
vided by eit er the Controller, Anti-Lock Brakes
(CAB)
or by t e ABS main relay when the relay is
not energized . The CAB illuminates the lamp by pro-
viding ground on circuit G19 .
splices to connect to circuit B47
e . When the ABS main relay is not
nnects circuit B47 to ground on circuit
path for the warning lamp is through
cuit B47, through the ABS main relay
ircuit Z 1 .
Circuit Gl
through a dio
energized, it c
Z1 . The groun
the diode to ci
to ground on
8W - 35
ALL-WHEEL ANTI-LOCK BRAKES
TJ
The diode between circuit G19 and B47 prevents
voltage from flowing to the CAB when the ABS main
relay switches to supply power on circuit B47 .
HELPFUL INFORMATION
When the ignition switch is in the START or RUN
position, it connects circuit Al from fuse 3 in the
Power Distribution Center (PDC) to circuit A21 . Cir-
cuit A21 powers circuit G5 through fuse 10 in the
fuse block .
STOP LAMP SWITCH INPUT
Circuit L50 provides the stop lamp switch input to
the Controller, Antilock Brakes (CAB).
DATA LINK CONNECTOR
Circuit D21 from of the Controller, Anti-Lock
Brakes (CAB) transmits data to the DRB scan tool
through the data link connector. Through the data
link connector, two branches of circuit Z12 provide
ground for the DRB scan tool .
SCHEMATICS AND DIAGRAMS
WIRING DIAGRAM INDEX
The following index covers all components found in
this section of the wiring diagrams . If the component
you are looking for is not found here, refer to section
8W-02 for a complete list of all components shown in
the wiring diagrams .