TM 5-2410-240-23-1
0021
Table 2. Cab Troubleshooting With Codes.
0021
CID FMI CODE
TEST OR INSPECTION
CORRECTIVE ACTION
N OT E
0070-03 Parking Brake Switch Volt-
age Above Normal
Always inspect harness connectors that are involved in circuit.
Poor connections can often be the cause of an electrical circuit
problem. Verify that all connections in circuit are clean and
secure, and connections are in good condition. If a problem with
connection is found, correct problem and verify diagnostic code
is active before performing this procedure.
Tag wiring harnesses to aid installation.
Perform this test only if condition is active.
1. Turn ignition switch and bat-
tery disconnect switch to OFF
position (TM 5-2410-240-10).
2. Disconnect harness connec-
tor C-C1 (WP 0018, Figure 13)
from parking brake switch (WP
0018, Figure 61). Refer to
Right Side Console (WP
0212).
3. Using digital multimeter, test
Continuity Check Does Not
parking brake switch (WP
Agree with Expected Results -
0018, Figure 61) for continuity
Switch is faulty. Replace parking
(WP 0283) between switch
brake switch (WP 0212). Ensure
terminals:
all harness connectors are recon-
a. Switch terminal 2 and
nected. Verify proper operation of
terminal 3. Refer to Table
machine (TM 5-2410-240-10).
3 for results.
Continuity Check Agrees with
b. Switch terminal 1 and ter-
Expected Results - Proceed to
minal 2. Refer to Table 3
step 4.
for results.
Table 3. Parking Brake Switch Position Table.
0021
Expected Results
Switch
Switch
Activation
Position
Terminal 3 and Terminal 2
Terminal 1 and Terminal 2
Released
Up
No Continuity (open)
Continuity (closed)
Depressed
Down
Continuity (closed)
No Continuity (open)
