Blue Ox BX8811 - Manual

Automatic Equipment Mfg. Co.
One Mill Road, Industrial Park
l
Pender, Nebraska 68047
BX8811 Installation Instructions
Tail Light Wiring Kit
The Tail Light Wiring Kit connects the tail, brake, and turn
signal lights of the motorhome (or other tow vehicle) to the
tail, brake, and turn signal lights of the towed vehicle.
NOTE: Some motorhomes have separate amber turn
signals and red brake lights which requires the use of a tail
light converter to change from a 4 wire system to a three
wire system. A tail light converter is not supplied with the
Tail Light Wiring Kit, but is available through your local
supply center.
WARNING: Incorrect wiring may result in blown fuses,
damaged wiring or computer systems, fire, or bodily injury.
Automatic Equipment recommends installation of this kit by
a trained professional. Automatic Equipment will not be
responsible for any personal property damage, or bodily
injury caused by incorrect wiring or misuse of this product.
Tools Required
Wire terminal crimper Wire stripper
Small wire cutter Standard screw driver Elec-
trical Tape
12 Volt D.C. continuity tester with needle point.
Check the parts in the kit against the parts list to
familiarize yourself with each item.
Parts List
Ref. Part
No. Qty. No. Description
1 1 294-0562 ....................... Wire Harness, 26 Ft., 4-wire
2 1 294-0560 .............................. 9 Terminal Diode Block
3 1 294-0563 ........................ Wire Splitter, 14 Ga, Tinned
4 1 294-0250 .......... Butt Connector, 16-14 Ga. Insulated
5 5 290-0297 ....................... Nylon Cable Tie, Beaded, 5"
6 9 201-0462 ... #6-32 x 1/2 Screw, Wire piercing washer
Installation
1. Starting in the engine compartment of the towed vehicle,
run the 26 ft. harness through the firewall, under the
drivers side door sill plate, under the back seat, and into
the trunk area. Depending on the motorhome set up, the
wire at the front of the engine compartment should be
wired into either a 4-wire or 6-wire trailer plug that is
mounted to the front of the towed vehicle.
2. Three wiring diagrams are shown. Identify your type of
vehicle wiring, then follow the wiring diagram which
pertains to your vehicle.
Type A: Vehicles with standard red turn signals.
Type B: Vehicles with separate amber or red signals (Brake
light wire splits before the lights).
Type C: Vehicles with separate amber or red signals (One
brake light wire comes out of the other brake light
socket).
NOTE: In Type A wiring systems only, access may be
made under the dash where existing wires extend from
the turn signal switch, down and rearward to the tail
lights.
NOTE: In the wiring systems type B and C, the amber
signals will only operate from the towed vehicles system.
The red brake lights will function as turn signals when
operated from the towing vehicle.
3. DO NOT PRE-STRIP WIRES. Start the wire piercing
screws into the tail light connector.
4. Make sure that the white wire is grounded to the vehicle
chassis. It is also important to have a good ground on
the towing vehicle.
Use a 12 Volt D.C. continuity lamp tester with a needle
point prod to identify the “hot” wires which power the
brake and tail lights. Ground one end of tester, and
insert prod through the insulation of each wire to identify.
At this point the 4-conductor cable should be cut to
length, leaving enough slack to reach the tail light
connector. NOTE: Vehicle lights must be on and the
corresponding turn signals will have to be operating in
order for wires to be “hot”.
NOTE: When tapping into the wires under the dash,
make sure to select the wires extending to the rear
lights, not those extending to the front lights.
5. After the tail light and turn signal wires are identified and
marked, shut off the power then cut each wire. Place
the wires from the front under their respective screws and
tighten down. DO NOT OVER TIGHTEN. Place the
wires to the back lights of the towed vehicle under their
respective screws and tighten down. Do the same with
the wires from the 26 ft. 4- conductor cable. (See wiring
diagram for your type of car). If the wire is a light gage,
the wire piercing screws may not penetrate the wire
casing properly. In this instance, doubling the wire under
the screw should allow it to make a good connection.
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