TM 5-2330-325-14&P
SECTION VI. ELECTRICAL SYSTEM MAINTENANCE
Paragraph
Page
Number
Paragraph Title
Number
General .......................................................................................................................... 4-33
Front and Rear 24-Volt Receptacle Replacement ....................................................... 4-34
12-Volt Receptacle Replacement .................................................................................. 4-38
Tail Light Replacement .................................................................................................. 4-40
Clearance and Running Light Replacement (Typical) ................................................. 4-42
Blackout Lights Replacement ........................................................................................ 4-44
Wiring Harness Replacement and Repair .................................................................... 4-46
Wiring Diagram .............................................................................................................. 4-47
WARNING
Remove all power to trailer prior to making any repairs on the electrical
system. Failure to do so may result in serious injury or death.
a.
The M870A3 trailer is equipped with two intervehicular cable receptacles, located on the front of the
trailer.
b.
The 12-pin, 24-volt receptacle is located to the right of the 7-pin, 12-volt receptacle.
c.
The M870A3 trailer is equipped with four tail lights, two on each side. The outer set of tail lights
includes both turn signals and running lights. The inner set of tail lights includes brake lights and
running lights. The M870A3 trailer is also equipped with two rear blackout lights, one on each side.
Each blackout light includes running lights, brake lights, and turn signals (both left and right).
Amber clearance lights are located on each front corner of the trailer side and on each side at
the midpoint of the trailer. Red clearance lights are located on each side at the rear of the trailer,
and three red running lights are also located at the center of the rear of the trailer. An amber
ABS light is located on the right rear corner of the trailer.
d.
Refer to wiring diagram (para. 4-45) for locating any untagged, disconnected wires.
