TM 5-2420-231-23-1
0129
Table 1. Rear Left Turn Signal Does Not Operate in Turn Only, Stoplights Operate Normally.
0129
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Rear Left Turn Signal Does
Not Operate in Turn Only,
Always inspect wiring harness connectors that are involved in the circuit.
Stoplights Operate Normally
Poor connections can often be the cause of a problem in an electrical
circuit. Verify that all connections in the circuit are clean and secure and
that all connections are in good condition. If a problem with the
connection is found, correct the problem and verify that this malfunction
or diagnostic code is active before performing this procedure.
Perform open or short-circuit test at each wiring harness connection to
identify the correct wiring harness to replace.
Tag all wiring harnesses to aid in installation.
Perform this test only if condition is active.
Test Step 1. Test for Faulty LH Turn
1. Turn ignition switch and battery
disconnect switch to OFF position
(TM 5-3805-298-10).
2. Remove instrument cluster for
access to wiring harness
connectors (WP 0252).
3. Disconnect connector C-C71
(WP 0012, Figure 159) (yellow and
white wires) from LH turn diode
(WP 0012, Figure 160).
4. Using digital multimeter
Continuity Replace LH turn diode
(WP 0174), measure diode
(WP 0012, Figure 160).
continuity between LH turn diode
Proceed to Test Step 2.
(WP 0012, Figure 160) terminal 1
No Continuity Proceed to step 5.
(red lead) and terminal 2 (black
lead).
5. Using digital multimeter
Continuity Replace lower cab wiring
(WP 0174), measure diode
harness (WP 0291).
continuity between LH turn diode
Proceed to Test Step 2.
(WP 0012, Figure 160) terminal 1
No Continuity Replace LH turn diode
(black lead) and terminal 2 (red
(WP 0012, Figure 160).
lead).
Proceed to Test Step 2.
Test Step 2. Verify Malfunction Is
Resolved.
1. Ensure all harness connectors are
connected.
2. Install instrument cluster
(WP 0252).