Specifications

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UBS Wiring Harness Handbook
IMPORTANT NOTE: Every lamp, reflex reflector, and conspicuity treatment must be
permanently attached in the location specified and must comply with all applicable
requirements prescribed for it by FMVSS/CMVSS 108. The face of any device on the
front/rear and sides should be respectively perpendicular and parallel to the vehicle’s
centerline unless it is photometrically certified at installation angle. No part of the vehicle
shall prevent any device from meeting its prescribed requirements unless an auxiliary
device meeting all prescribed requirements is installed.
IN CANADA: Manufacturers and importers of vehicles must have the proper certification
test records demonstrating compliance of lighting components with all prescribed
requirements.
BASIC EQUIPMENT REQUIRED ON ALL TRAILERS
DESCRIPTION MANDATORY REQUIREMENTS
Area Equipment
SAE Lens
Code
Function Quantity Color Location Height From the Ground
1
Tail Lamps T
Indicate vehicle’s
presence and width
Minimum 2 Red
On the rear - symmetrical
as far apart as practicable
380 - 1,830 mm
15 - 72 inches
Stop Lamps S Indicate braking Minimum 2 Red
On the rear - symmetrical
as far apart as practicable
380 - 1,830 mm
15 - 72 inches
Rear Turn Signal
Lamps
I
Indicate direction of
turn
Minimum 2
Red or
Yellow
On the rear - symmetrical
as far apart as practicable
380 - 2,110 mm
15 - 83 inches
Rear Reflex
Reflectors
A
Indicate vehicle’s
presence and width
Minimum 2 Red
On the rear - symmetrical
as far apart as practicable
facing rearward
380 - 1,530 mm
15 - 60 inches
2
License Plate
Lamp(s)
L
Illuminates license
plate
Minimum 1 White
On the rear - above or at the sides of
license plate
No requirement
3
Rear Side
Marker Lamps
P2, PC* or
P3, PC2*
Front and rear side
marker lamps / side
reflex reflectors
indicate vehicle’s
presence and length
Minimum 2 Red
Each side at rear
as far back as practicable
380 - 1,530 mm
15 - 60 inches
no max. for veh. under 2,032 mm (80
inches) wide
Rear Side Reflex
Reflectors
A Minimum 2 Red
Each side at rear
as far back as practicable
facing sideward
380 - 1,530 mm
15 - 60 inches
4a
Front Side
Marker Lamps
P2, PC* or
P3, PC2*
Minimum 2 Yellow
Each side at front
as far forward as practicable
380 mm minimum
15 inches minimum
4b
Front Side
Reflex Reflectors
A Minimum 2 Yellow
Each side at front
as far forward as practicable
facing sideward
380 - 1,530 mm
15 - 60 inches
ADDITIONAL EQUIPMENT FOR TRAILERS EXCEEDING THE FOLLOWING PARAMETERS
Length 9.1 m (30 ft) or longer
5a
Intermediate
Side Marker
Lamps
P2 or P3
Indicate presence of
a long vehicle
Minimum 2 Yellow
Each side near center
facing sideward
380 mm minimum
15 inches minimum
5b
Intermediate
Side Reflex
Reflectors
A
Indicate presence of
a long vehicle
Minimum 2 Yellow
Each side near center
facing sideward
380 - 1,530 mm
15 - 60 inches
Width 2,032 mm (80 inches) or wider
6
Rear Clearance
Lamps
P2, PC* or
P3, PC2*
Show vehicle’s width
MAY NOT be
combined with tail
Minimum 2 Red
At widest point - symmetrical
on the rear or near the rear
facing rearward
As high as practicable
may be lower only if ID lamps are at
the top
7
Rear
Identification (ID)
Lamps
P2 or P3
Indicate presence of
a wide vehicle
Exactly 3 Red
On the rear - center
horizontally spaced 150 mm (6 in) to 300
mm (12 in) apart facing rearward
In Canada: at the top - may be lower
if door header narrower than 25 mm
In USA: as high as practicable
8
Front Clearance
Lamps
P2, PC* or
P3, PC2*
Show vehicle’s width Minimum 2 Yellow
At widest point - symmetrical
on the front or near the front
facing forward
As high as practicable
Width 2,032 mm (80 inches) or wider AND GVWR 4,536 kg (10,000 lbs) or more
DESCRIPTION MANDATORY REQUIREMENTS
Area Conspicuity Treatment
DOT
Code
Quantity Color Location Height Options
9 Rear Upper Body Markings
DOT-C
DOT-C2
DOT-C3
DOT-C4
Exactly 2 pairs of
300 mm long strips
White
On the rear upper corners
facing rearward
At the top
Reflex reflectors may
not be required if they
are replaced in their
required location with
conspicuity treatment.
Optional in Canada:
Rear lower body and
side conspicuity
treatment may also be
solid white, solid
yellow, or white and
yellow.
10 Bumper Bar Marking Continuous Red/White
On the rear bumper bar’s
horizontal element
full width - facing rearward
No requirement
11 Rear Lower Body Marking Continuous
Red/White
(See options)
On the rear
full width of the vehicle
facing rearward
As horizontal as practicable
and as close as practicable to
the range of 375 to 1,525 mm
from the ground
12 Side Marking See Location
Red/White
(See options)
Each side - facing sideward
continuous, or evenly spaced over
minimum of 50% of length
starts and ends as close to the front
and rear of the vehicle as practicable
As horizontal as practicable
and as close as practicable to
the range of 375 to 1,525 mm
from the ground
CANADIAN MOTOR VEHICLE SAFETY STANDARDS & FEDERAL MOTOR VEHICLE SAFETY STANDARDS
* Photometrically certified at
installation angle
** Not required on truck tractors § Vehicles less than 2,032 mm
wide
†Vehicles 2,032 mm wide or
wider
‡Vehicles less than 2,032 mm
wide and 4,536 kg
‡Vehicles less than 2,032 mm wide and 4,536 kg
4a
8 4ab 12 5ab 12 3
699 7 9 9
12 210 10 111114ab 12 5ab 12 3
8 8 4a 5a6 79966
8
5a 1212