Warner Electric Utility Controller Hand–Air Operated - Manual (Page 6)

6 Warner Electric • 800-825-9050 P-1395 • 819-0288
Blue Wire:
1. Detach the power cables from the towing
vehicle battery.
2. An electrical socket which mates with the
trailer power cable is to be installed in the
rear of the towing vehicle.
3. Extend the wire along the underside of the
towing vehicle to the engine fire wall. Position
the wire to ensure maximum protection from
flying stone, spray, and dragging on the road.
Also avoid attaching wires near mufflers and
exhaust pipes.
Clamp the wires at frequent intervals.
4. Remove a knock-out plug or cut a hole in the
firewall near the mounted controller.
5. Cut the wire to a proper length for reaching
the controller. Strip the wire and feed it
through the firewall hole.
6. Connect this wire to the blue brake lead wire
extending from the back of the controller.
7. Strip one end of a second length of hook-up
wire. Connect it securely to the ground
terminal of the socket at the rear of the
towing vehicle.
8. Extend the wire under the towing vehicle to a
convenient chassis ground, such as a body or
chassis nut and bolt, battery ground post,
etc. Remove all rust, dirt, and other corrosion
from the fastening surface.
Cut and strip the wire and attach it securely
to this ground.
A good ground connection is essential for
proper operation.
Red Wire:
9. 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
located in the brake line or a limit switch
activated by the brake pedal.
Connect an in-line 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 length of hook-up wire from the red
lead to the stoplight switch output.
If your towing vehicle uses another system,
consult your vehicle dealer.
Black Wire:
10. The black or power lead of the controller is
the last connection made.
Strip one end of the hook-up wire. Feed it
through the hole in the fire wall from the
engine side.
Solder or crimp clamp this wire to the black
controller lead.
11. Cut the hook-up wire to the proper length
to attach it to the terminal of the starter
solenoid or relay.
Strip the wire and complete the connection.
Attaching this lead completes your electrical
connection.
Reconnect the towing vehicle battery cable.