Dodge ram truck 3500 1996 Service Manual page 244

5 - 60 BRAKES
DIAGNOSIS AND TESTING (Continued)
(c) I f dimension A and dimension B exceeds their
specifications, replace both the RWAL speed sensor
and exciter ring. Also, repair the differential i f nec­
essary.
RWAL DIAGNOSIS PROCEDURES—TEST 3
The CAB illuminates the brake warning lamp any­
time i t illuminates the ABS warning lamp. This test
is performed only to identify the reason why the CAB
did not illuminate the brake warning lamp when the
ABS lamp was illuminated. During the test, the
RWAL 14-way CAB connector will be disconnected.
When the connector is disconnected, all DTCs stored
in memory will be erased. Prior to this test, retrieve
and record all DTCs for future reference. Refer to the
RWAL DIAGNOSTIC CONNECTOR LOCATION and
the RWAL DIAGNOSTIC TROUBLE CODE section
in this group
Step Action Yes
No
1 With the ignition key in the RUN position, apply the
parking brake. © Did the brake warning lamp
illuminate?
Perform step 4. Perform step 2.
2 Turn the ignition switch to the START position.
® Did the brake warning lamp illuminate while the
ignition switch was placed in the START position?
Perform step 4. Perform step 3.
3
Remove the brake warning lamp bulb. Verify the bulb
is not burned out or damaged.
• Is the bulb functional?
Perform step 6.
Replace the bulb and
restart the test at the
RWAL DIAGNOSIS
section.
4
Disconnect the RWAL 14-way connector and the
connector to the brake warning lamp bulb. Refer to
section 8W for proper brake warning lamp wiring.
Connect an ohmmeter between terminal 5 of the
RWAL 14-way connector and the brake warning
lamp bulb's ground circuit. Refer to section 8W for
proper brake warning lamp wiring.
© Is there continuity between the brake warning
lamp bulb's ground circuit and terminal 5 of the
RWAL 14-way connector?
Perform step 5.
Repair the open circuit
between the RWAL
14-way connector and
the brake warning
lamp. Once the repair
is complete, restart the
test at the RWAL
DIAGNOSIS section.
5
Inspect the RWAL 14-way CAB connector.
© Are there any terminals that are bent, expanded,
broken? Are the locking tabs functional? Are any
wires pushed out from the connector?
Repair as necessary
and restart the test at
the RWAL
DIAGNOSIS section.
Replace the CAB and
perform the Verification
Test.
6
Inspect the connector to the brake warning lamp
circuit. Refer to section 8W for proper brake warning
lamp wiring.
© Are there any terminals that are bent, expanded,
broken? Are the locking tabs functional? Are any
wires pushed out from the connector?
Repair as necessary
and restart the test at
the RWAL
DIAGNOSIS section.
Replace the message
center or instrument
cluster as required and
restart the test at the
RWAL DIAGNOSIS
section.