Warner Electric 1300-77 12 Volt Utility Controller for 4, 6 or 8 - Manual (Page 4)

4 Warner Electric • 800-825-9050 P-1379 • 819-0094
8. Feed the wire under the towing vehicle to a
convenient chassis ground, such as a body
or chassis nut and bolt, battery ground-post,
etc. Cut and strip the wire and attach it
securely to this ground. A good ground
connection is essential for proper
operation.
9. Two Utility Controller leads are still to be
connected. The red lead actuates the
stoplights when the controller is operated
manually. An interrupted stoplight circuit for
turn signals is used on most towing
vehicles. Connect the controller’s red lead
to the output side of the towing vehicle
stoplight switch. (This switch could be a
pressure switch in the brake line or a limit
switch activated by the brake pedal.)
Connect an inline fuse in series between the
red lead and the stoplight switch. This fuse
should be the same type and rating as
recommended for the tow vehicle’s existing
stoplight circuit. Splice a short length of
hook-up wire to the red lead to reach the
stoplight switch output. If your towing
vehicle has some other system, consult your
automotive dealer.
10. The black or power lead of the controller is
last to be connected. Enough hook-up wire
should remain to make this connection. Strip
one end of this hook-up wire and feed it
through a hole in the firewall from the engine
side. Solder or crimp clamp this wire to the
black controller lead.
11. Detach one of the power cables from the
towing vehicle battery to prevent arcing.
12. Cut the hook-up wire to the proper length
to attach it to the live terminal of the starter
solenoid or relay, strip the wire and
complete the connection. Attaching this lead
completes your electrical connection.
Re-connect the towing vehicle battery cable.
13. Tape together wires leading from the
controller and secure them to the steering
column or underside of the dash. Plug all
holes in the firewall with sealant or rubber
grommets to prevent exhaust gases from
entering through the holes and to protect the
wires from abrasion.
Optional Equipment
When the trailer load is variable or less than
trailer bake capacity, a Warner Electric Load
Control, Part No. 1300-78 should be added in
series with the brake circuit. The Load Control
provides the capability to properly proportion
the braking power of the trailer brakes to the
trailer weight. The Load Control is connected
into the trailer brake wire connected to the blue
lead from the controller. Its position is shown
in the wiring diagram under the “Electrical
Connection”. The illustration shows the
simplicity of adjusting this resistor to increase
or decrease trailer brake torque. Contact your
Warner Electric distributor or the factory if you
require additional information.