Trailer Electrical Socket
Hillsboro extruded floor aluminum
truck beds are equipped with two holes in
the gooseneck ball plate. One of these holes
is to be used for running a pigtail with a trail-
er electrical socket on the end. This pig tail
should be 1-2 foot long so that it can be
coiled in the ball plate box and covered with
the gooseneck hitch lid when it is not being
used. The provided grommet should be
used in the hole selected for the pigtail, also
zip ties should be used on both sides of the
grommet to keep the desired length of plug
in the ball plate box to prevent dragging.
When a trailer is attached route the pigtail
so that is not damaged by the safety chains
or trailer coupler.
LED Lighting
Turn Signal Fast Flash Rate
Because LEDs draw significantly less current than traditional incandescent lamps (as low as
1/10
th
), using LED lights in a Hillsboro Truck bed can cause a fast flash rate of the turn signal
circuits. The fast flash rate can be corrected in a couple of different ways depending on the
make and year of the truck. Please
refer to the table on the next page
for more information.
LED Resistor Harness
Please
refer to the table on the next page
to see if resistor harnesses are needed to correct
the turn signal fast flash rate.
Hillsboro Industries has developed a LED resistor harness (part number 233805) that plugs in
between the LED light and the Hillsboro truck bed wiring harness. The resistor harness con-
tains a 6 ohm 50 watt power resistor. The resistor draws the same current (appx. 2 amps) as
the original incandescent light and therefore the turn signals flash at the correct rate.
To install the resistor harness, plug it in between the LED stop/turn/tail light and the Hillsboro
truck bed harness.
The power resistor gets very hot during operation and needs to be mount-
ed to a metal surface (preferably aluminum) which acts as a heat sink. Make sure that
all wiring is kept clear of the resistor and heat sink.
Page 9
Summary of Contents for 2500 Series
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