TM-5-2330-378-14-P
SEMITRAILER, LOWBED: 40 TON CONSTRUCTION EQUIPMENT TRANSPORTER M870 AND M870A1
TECHNICAL MANUAL; OPERATOR'S, UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)
JUNE 1999
TM-5-2330-378-14-P - Page 29 of 524
TIVI5-2330-378-14&P
1-18. LIGHTINGSYSTEM.
The lighting system of both the M870 and the M870Al
semitrailers
receives electrical power from the towing vehicle
through a voltage reduction
box located in the gooseneck.
The semitrailers operate on a 12-volt or 24-volt power
supply.
If a 24-volt supply is used, voltage is reduced to 12 volts by the voltage reduction box to all components
but
the 24-volt blackout lights on the M870AI
trailer.
a.
CLEARANCE
LIGHTS are on the front, rear, and both sides of the M870 and the M870AI
semitrailers.
They turn on and off with the service lights of the towing vehicle.
b.
STOPLIGHTS,
TURN LIGHTS, AND TAILLIGHTS
are on the rear of the M870 and M870Al
semitrailers
and work with the towing vehicle service lights to indicate stops and turns and to mark the location of the
rear of the semitrailers
in low light conditions.
c.
BLACKOUT
LIGHTS (M870A1) are on the rear of the sernitrailerand
workwith the towing vehicle service
lights to mark the location of the rear of the semitrailer
in blackout conditions.
1-15
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