TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
44.
BOTH TAILLIGHTS DO 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.
Step 1.Using number one cross-tip screwdriver, unscrew and take out four screws (1) and take
terminal cover (2) off of left taillight assembly (3). Using multimeter set to 20 vdc scale. Connect
red test lead to wire terminal (4) and black test lead to ground. Have assistant push LIGHTS
switch handle (5) up to on position. Check for 11 to 13 vdc on multimeter. Have assistant push
LIGHTS switch handle (5) to off position. Disconnect test leads.
If multimeter does not read 11 to 13 vdc, place terminal cover (2) into position and screw
in four screws (2) and tighten using number one cross-tip screwdriver and go to step 2.
Step 2.Using 9/16-inch open-end wrench, unscrew line nut (6) and take off air line (7). Using
number one cross-tip screwdriver, unscrew and take out eight screws (8) and eight flat washers
(9). Push air line (7) through hole while taking out left lower rear molding (10). Using multimeter
set to 20 vdc scale. Connect red test lead to terminal (11) on junction box (12). Have assistant
push LIGHTS switch handle (5) up to on position. Check for 11 to 13 vdc on multimeter. Have
assistant push LIGHTS switch handle (5) to off position. Disconnect test leads.
a.If multimeter does not read 11 to 13 vdc, 68A wire (13) must be replaced. Notify
Direct Support Maintenance.
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