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Blue Ox BX8811 User Manual

Tools required, Parts list, Installation

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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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