TM 5-3805-293-23-2
0023
Table 1. Cab Electrical Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
18. One or Both Blackout
Test Step 2. Check for Faulty Rear
Tail Lights Do Not Oper-
Lamps Harness.
ate - Continued
1. Disconnect the rear lamps har-
ness connector AG-C20 (WP
0009, Figure 311) from rear chas-
sis wiring harness connector FA-
C29 (WP 0009, Figure 310) (WP
0178).
2. Using digital multimeter, test for
Voltage Between 18 and 26 Volts -
voltage between rear chassis wir-
Replace rear lamps harness (WP
ing harness connector FA-C29
0178).
(WP 0009, Figure 310) terminal 4
Proceed to step 3.
and terminal 1 (Gnd). Voltage
Voltage Less Than 18 Volts - Pro-
should be 18 to 26 volts.
ceed to Test Step 3.
3. Turn battery disconnect switch to
One or Both Blackout Tail Lights
the ON position and control indi-
Do Not Operate - Repeat trouble-
cator switch to position B.O.
shooting from the beginning.
DRIVE (TM 5-3805-293-10), and
Both Blackout Tail Lights Operate -
verify both blackout tail lights
Troubleshooting complete.
operate.
Test Step 3. Check for Faulty Cab
Lower Wiring Harness.
1. Disconnect the rear chassis wir-
ing harness connector FA-C22
(WP 0009, Figure 47) from cab
lower wiring harness connector P-
C69 (WP 0009, Figure 46) (WP
0266).
2. Using digital multimeter, test for
Voltage Between 18 and 26 Volts -
voltage between cab lower wiring
Replace rear chassis wiring harness
harness connector P-C69 (WP
(WP 0188).
0009, Figure 46) terminal 20 and
Connect the connector AG-C15 (WP
29. Voltage should be 18 to 26
0009, Figure 341) to right tail light
volts.
(WP 0177).
Connect the connector AG-C16 (WP
0009, Figure 400) to left tail light (WP
0177).
Proceed to step 3.
Voltage Less Than 18 Volts - Pro-
ceed to Test Step 4
0023-111
