Electrical System 217
When installing a trailer socket, it may be neces-
sary to replace the original vehicle flasher unit with a
heavy duty unit to maintain the flash rate in accor-
dance with local regulations. Local regulations may
also require the installation of a dashboard mounted
repeater lamp.
Should the trailer socket and plug not be matched,
adaptors can be made or obtained to facilitate con-
nection.
TO INSTAL TRAILER SOCKET.
The minimum materials required are a trailer
socket, mounting bracket, seven core flex, insulated
wiring connectors and a rubber grommet.
(1) Disconnect the negative battery terminal.
(2)Locate the wiring harness for the lamps at
the rear of the vehicle.
For five pin sockets and plugs, use the following
standard trailer wiring code:
Terminal No.CircuitColor2 Left turn signal lampYellow
3Earth White
5 Ri
ght turn signal lampGreen
6Stop lamp Red
7 Tail lam
p Brown
Minimum material needed for wiring up a trailer.
Utilux trailer socket and plug shown.
(3) Identify the wires for the right turn signal
lamp, left turn signal lamp, tail lamp, stop lamp,
reverse lamp and earth. Use the vehicle wiring
diagram in this section to determine the wire color
for each lamp circuit.
(4)Connect the seven core flex to the various
lamp wires using insulated connectors.
For seven pin sockets and plugs, use the following
standard trailer wiring code:
Terminal No.CircuitColor1 Left turn signal lamp Yellow
2 Reversing lamp Black
3EarthWhite
4 Right turn signal Green
lamp
5Electric brakesBlue
6 Stop lampRed
7
Tail lampBrown
For six pin sockets and pl ugs, use the following
standard trailer wiring code:
Terminal No.CircuitColor1 Tail LampBrown
2 Left Turn Signal Lamp Yellow
3Right Turn Signal LampGreen
4 Stop LampRed
5AuxilaryBlue
6 Earth White
(5) Drill a suitably si
zed hole through the vehicle
floor and install a rubber grommet to the hole.
NOTE: Before drilling the hole, check
whether there is an existing hole which may-
be used. Ensure that a rubber grommet is
installed to prevent chafing of the wires.
Pass the seven core flex through the rubber
grommet. Cut the seven core flex to the required length
and slide the dust cover onto the flex. Remove approximately 15 mm of insulation
from each wire in the flex.
Connect the wires of the seven core flex to
the terminals of the socket, using the standard wiring
code and following the socket manufacturers connec-
tion procedure. Assemble the socket and install the dust cover
to the rear of the socket. Install the mounting bracket as close as
possible to the tow bar ball and high enough to
maintain vehicle ground clearance. Install the socket to the mounting bracket.
Connect a trailer plug to the socket and test
for correct lamp operation.
TO INSTAL TRAILER PLUG
The minimum materials required are a trailer
plug, seven core flex and insulated wiring connectors.
The installation procedure for the trailer plug is
similar to that for the socket with attention to the
following points:
Connect the trailer wiring to the plug accord-
ing to the standard wiring color code and the plug
manufacturers instructions. Use a suitable length of
seven core flex and insulated connectors should the
trailer wiring not be long enough.
If the trailer wiring does not conform to the
standard color code, identify each circuit as follows: (a) Locate the trailer earth wire.
PLUG
