TM 5-3805-293-23-2
0023
Table 1. Cab Electrical Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
11. Rear Right Turn/Stop
2. Disconnect the cab lower wiring
Lamp Does Not Operate
harness connector P-C47 (WP
in Turn Only, Both Stop
0009, Figure 330) from turn signal
Lights Operate Normally
switch (WP 0009, Figure 331)
- Continued
(WP 0283).
3. Using digital multimeter, measure
Resistance Less Than 5.0 Ohms -
for resistance between turn sig-
Replace cab lower wiring harness
nal switch (WP 0009, Figure 331)
(WP 0266).
terminal 2 and terminal 3. Resis-
Proceed to step 4.
tance should be less than
Resistance 5.0 Ohms or Greater -
5.0 ohms.
Replace turn signal switch (WP 0283).
Connect the rear right turn diode (WP
0009, Figure 324) to cab lower wiring
harness connector P-C30 (WP 0009,
Figure 325) (WP 0266).
Proceed to step 4.
4. Turn control indicator switch to
Rear Right Turn Signal Does Not
position SER. DRIVE, turn signal
Operate - Repeat troubleshooting
switch (TM 5-3805-293-10) to the
from the beginning.
right turn signal position and verify
Rear Right Turn Signal Operates -
rear right turn signal operates.
Troubleshooting complete.
N OT E
12. Front and Rear Turn Sig-
nals Do Not Operate in
Always inspect the harness connectorsthat are involved in the circuit.
Either Right or Left Posi-
Poor connections can often be the cause of a problem in an electrical
tion, Brake Lights Oper-
circuit. Verify that all connections in the circuit are clean and secure,
ate Normally
and that all connections are in good condition. If a problem with a con-
nection is found, correct the problem and verify that this diagnostic code
is Active before performing this procedure.
Perform open or short circuit test ateach harness connection to identify
correct harness to replace.
Perform this test only if condition is active.
Test Step 1. Check for Power to
Flasher Module.
1. Turn control indicator switch to
position SER. DRIVE (TM 5-
3805-293-10).
2. Turn the turn signal switch (TM 5-
3805-293-10) to the right turn sig-
nal position.
3. Disconnect the cab lower wiring
harness connector P-C20 (WP
0009, Figure 349) from flasher
module (WP 0266).
0023-63
