TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
32. ONE DUMP BODY MARKER LIGHT DOES NOT WORK.
WARNING
Although KEY SWITCH must be on and battery ground cable connected to test electrical circuit
voltage, turn off KEY SWITCH and disconnect battery ground cable before doing resistance tests
or replacing parts. This will keep you from getting shocked and prevent damage to parts and
equipment.
NOTE
Scrape painted surfaces to bare metal before connecting test leads to ensure correct multimeter
readings.
Steps given are typical for all dump body marker lights.
Step 1.Test marker light (1) as follows: Using 3/16-inch flat-tip screwdriver, pry
marker light (1) out of grommet (2). Pull marker light (1) off plug (3). Set
multimeter to 20 vdc scale. Connect red test lead to connector (4) and black test
lead to ground. Put LIGHTS switch (5) in down position. Check for 11 to 13 vdc on
multimeter. Put LIGHTS switch (5) in center position. Disconnect test leads.
a.
If multimeter does not read 11 to 13 vdc, black wire (6)
must be
replaced. Notify Direct Support maintenance.
b.
If multimeter reads 11 to 13 vdc, go to step 2.
Step 2.Set multimeter to ohms scale and adjust to 0 ohms. Connect red test lead to
connector (7) and black test lead to ground. Check for 0 ohms on multimeter.
Disconnect test leads.
a.
If multimeter read no continuity, white wire (8) must be
replaced.
Notify Direct Support maintenance.
b.
If multimeter reads 0 ohms, go to step 3.
Step 3.Test marker light (1) as follows: Set multimeter to ohms scale and adjust to
0 ohms. Connect red test lead to contact (9) and black test lead to contact (10).
Check for 0 ohms on multimeter. Disconnect test leads.
a.
If multimeter reads no continuity, replace marker light (1)
(page 2-805).
b.
If multimeter reads 0 ohms, go to step 4.
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