TSC Wiring Harness
The TSC wire harness has five wires requiring electrical connection and one wire for the status LED light.
The function of each of these wires is outlined in the table below:
The 14 ga. wires of the TSC wiring harness are approximately 12 inches long to allow for flexibility when
mounting the unit. Extensions will be required to connect the unit to the trailer's electrical wiring. When
making connections to the trailer's wiring harness, the desired termination is a solder joint. If the
connection is not soldered, use the appropriate size and type of "crimp-type" weather sealed heat-shrink
connectors, using the manufacturer’s recommended crimping tools in accordance with their crimping
instructions. Once the 14 ga. wires are connected, route the Status Light wire to a location on the front
of the trailer and mount the Status Light Module onto a flat surface using self-tapping screws. Select a
location that makes it easy to see the Status Light when looking at the front of the trailer.
Taking shortcuts when connecting any wires on your trailer only increases the likelihood that some part
of your electrical system will fail. Make sure your splice connections are durable and sealed against
exposure to water and corrosive elements. One loose wire connection can disable your entire trailer
brake system.
When adding extension wires to the TSC wiring harness, you must use the correct gauge wire.
These gauge sizes are outlined in the table above.
TSC
Wires
Trailer Wire Function
Wire Gauge
Required
Purple Wire
Left (driver's) side electric brake
output (all driver's side brakes)
14 Ga. Minimum
Pink Wire
Right (curb) side electric brake
output (all curb side brakes)
14 Ga. Minimum
White Wire
Trailer battery/frame ground point
14 Ga. Minimum
Blue Wire
Electric brake controller signal from
tow vehicle
14 Ga. Minimum
Black Wire
12VDC from tow vehicle trailer
harness
14 Ga. Minimum
Failure to use the correct gauge wire may result in poor braking performance or
brake failure. Improper wire gauge may also result in significant damage to your
trailer or its components, cause a fire, which may result in serious or fatal injury
and/or property damage. Undersized wire will prevent electrical circuit protection
devices such as fuses or circuit breakers from functioning properly. Undersized
wire may melt or burn before these safety devices can be activated.
!
Page 7
Section Two: TSC Wiring, continued
Warning!
Black Wire
10 foot wire with a two pin connector
on the end that plugs into the LED
status light
included in kit
