A. Inspection procedure -- heavy vehicles:
1. Remove existing inspection sticker (all vehicles). 2. While in right front, inspect right side glass and right side lug nuts, windshield, seat belts, and door latches. 3. Drive vehicle into inspection lane. 4. While in driver's seat, check left side glass and window crank, windshield, driver's seat, seat belts, door latches and parking or holding brake. Check service brake, high beam indicator, turn signal switch, air brake low air warning, air pressure loss, (single/combination) horn, windshield wiper, defroster, mirrors, steering lash and floor pan. 5. Check exhaust system and fuel tank. 6. Check right side marker and clearance reflectors. 7. Check all rear lights (including brake and turn signal). Check all rear reflectors. 8. Check left side marker, clearance lights and reflectors. 9. Check all wheels for brakes, push rod travel, tires, rims and suspension. 10. Check headlights, fog, driving, turn signals, other lights and reflectors. 11. Check steering system, ball joints/king pin, shocks, springs. 12. Open hood and check latching mechanism, master cylinder, engine mounts, and compressor belts. 13. Check frame (all vehicles) and coupling device. 14. Check air lines and couplings. Disconnect emergency air line (red) (left) and check for automatic operation of trailer breakaway brakes. Check tractor air protection valve. (Combination vehicle only). 15. Issue approval or rejection sticker. B. Inspection guidelines. Required lamps and reflectors on commercial vehicles.
Lamps and reflex reflectors. Table 1 specifies the requirements for lamps, reflective devices and associated equipment by the type of commercial motor vehicle. The diagrams in this section illustrate the position of the lamps, reflective devices and associated equipment specified in Table 1. All commercial motor vehicles manufactured on or after December 25, 1968, must, at a minimum, meet the applicable requirements.
Table 1
Required Lamps and Reflectors on Commercial Motor Vehicles Greater Than 26,000 Pounds GVWR
Item on the vehicle
Quantity
Color
Location
Position
Height above the road surface in millimeters (mm) (with English units in parenthesis) measured from the center of the lamp at curb weight
Vehicles for which the devices are required
Headlamps
2
White
Front
On the front at the same height, with an equal number at each side of the vertical center line as far apart as practicable.
Not less than 559 mm (22 inches) nor more than 1,372 mm (54 inches)
A, B, C
Turn signal (front)
2, 12
2
Amber
At or near the front
One on each side of the vertical centerline at the same height and as far apart as practicable.
Not less than 381 mm (15 inches) nor more than 2,108 mm (83 inches.)
A, B, C
Identification lamps (front)
1
3
Amber
Front
As close as practicable to the top of the vehicle, at the same height, and as close as practicable to the vertical centerline of the vehicle (or the vertical centerline of the cab where different from the centerline of the vehicle) with lamp centers spaced not less than 152 mm (6 inches) or more than 305 mm (12 inches) apart. Alternatively, the front lamps may be located as close as practicable to the top of the cab.
All three on the same level as close as practicable to the top of the motor vehicle.
B, C
Tail lamps
5, 11
2
Red
Rear
One lamp on each side of the vertical centerline at the same height and as far apart as practicable.
Both on the same level between 381 mm (15 inches) and 1,829 mm (72 inches).
A, B, C, D, E, F, G, H
Stop lamps
5, 13
2
Red
Rear
One lamp on each side of the vertical centerline at the same height and as far apart as practicable.
Both on the same level between 381 mm (15 inches) and 1,829 mm (72 inches).
A, B, C, D, E, F, G
Clearance lamps
8, 9, 10, 15, 17
2
Amber
One on each side of the front of the vehicle
One on each side of the vertical centerline to indicate overall width.
Both on the same level as high as practicable.
B, C, D, G, H
2
Red
One on each side of the rear of the vehicle
One on each side of the vertical centerline to indicate overall width.
Both on the same level as high as practicable.
B, D, G, H
Reflex reflector, intermediate (side)
2
Amber
One on each side
At or near the midpoint between the front and rear side marker lamps, if the length of the vehicle is more than 9,144 mm (30 feet).
Between 381 mm (15 inches) and 1,524 (60 inches).
A, B, D, F, G
Reflex reflector (rear)
5, 6, 8
2
Red
Rear
One on each side of the vertical centerline, as far apart as practicable and at the same height.
Both on the same level, between 381 mm (15 inches) and 1,524 mm (60 inches).
A, B, C, D, E, F, G
Reflex reflector (rear side)
2
Red
One on each side (rear)
As far to the rear as practicable.
Both on the same level, between 381 mm (15 inches) and 1,524 mm (60 inches).
A, B, D, F, G
Reflex relector (front side)
16
2
Amber
One on each side (front)
As far to the front as practicable.
Between 381 mm (15 inches) and 1,524 mm (60 inches).
A, B, C, D, F, G
License plate lamp (rear)
11
1
White
At rear license plate to illuminate the plate from the top or sides
As far to the front as practicable.
No requirements
A, B, C, D, F, G
Side marker lamp (front)
16
2
Amber
One on each side
Not less than 381 mm (15 inches).
A, B, C, D, F
Side marker lamp intermediate
2
Amber
One on each side
At or near the midpoint between the front and rear side marker lamps, if the length of the vehicle is more than 9,144 mm (30 feet).
Not less than 381 mm (15 inches).
A, B, D, F, G
Side marker lamp (rear)
4, 8
2
Red
One on each side
As far to the rear as practicable.
Not less than 381 mm (15 inches), and on the rear of trailers not more than 1,524 mm (60 inches).
A, B, D, F, G
Turn signal (rear)
5, 12
2
Amber or red
Rear
One lamp on each side of the vertical centerline as far apart as practicable.
Both on the same level, between 381 mm (15 inches) and 2,108 mm (83 inches).
A, B, C, D, E, F, G
Identification lamp (rear)
3, 7, 15
3
Red
Rear
One as close as practicable to the vertical centerline. One on each side with lamp centers spaced not less than 152 mm (6 inches) or more than 305 mm (12 inches) apart.
All three on the same level as close as practicable to the top of the vehicle.
B, D, G
Vehicular hazard warning signal flasher lamps
5, 12
2
Amber
Front
One lamp on each side of the vertical centerline, as far apart as practicable.
Both on the same level, between 381 mm (15 inches) and 2,108 mm (83 inches).
A, B, C
1 or 2
Amber or red
Rear
One lamp on each side of the vertical centerline, as far apart as practicable.
Both on the same level, between 381 mm (15 inches) and 2,108 mm (83 inches).
A, B, C, D, E, F, G
Backup lamp
14
1 or 2
White
Rear
Rear
No requirement
A, B, C
Parking lamp
2
Amber or white
Front
One lamp on each side of the vertical centerline, as far apart as practicable.
Both on the same level, between 381 mm (15 inches) and 2,108 mm (83 inches).
A
Legend: Types of commercial motor vehicles shown in the last column of Table 1: A. Buses and trucks less than 2,032 mm (80 inches) in overall width. B. Buses and trucks 2,032 mm (80 inches) or more in overall width. C. Truck tractors. D. Semi-trailers and full trailers 2,032 mm (80 inches) or more in overall width except converter dollies. E. Converter dolly. F. Semi-trailers and full trailers less than 2,032 mm (80 inches) in overall width. G. Pole trailers. H. Projecting loads.
Note: Lamps and reflectors may be combined as permitted by equipment combinations.
NOTES:
1
Identification lamps and reflectors may be mounted on the vertical centerline of the cab where different from the centerline of the vehicle, except where the cab is not more than 42 inches wide at the front roofline, then a single lamp at the center of the cab shall be deemed to comply with the requirements for identification lamps. No part of the identification lamps or their mountings may extend below the top of the vehicle windshield.
2
Unless the turn signals on the front are so constructed (doubled-faced) and located as to be visible to passing drivers, two turn signals are required on the rear of the truck tractor, one at each side as far apart as practicable.
3
The identification lamps need not be visible or lighted if obscured by a vehicle in the same combination.
4
Any semitrailer or full trailer manufactured on or after March 1, 1979, shall be equipped with rear side-marker lamps at a height of not less than 381 mm (15 inches), and on the rear of the trailers not more than 1,524 mm (60 inches) above the road surface, as measured from the center of the lamp on the vehicle at curb weight.
5
Each converter dolly, when towed singly by another vehicle and not as part of a full trailer, shall be equipped with one stop lamp, one tail lamp, and two reflectors (one on each side of the vertical centerline, as far apart as practicable) on the rear. Each converter dolly shall be equipped with rear turn signals and vehicular hazard warning signal flasher lamps when towed singly by another vehicle and not as part of a full trailer, if the converter dolly obscures the turn signals at the rear of the towing vehicle.
6
Pole trailers shall be equipped with two reflex reflectors on the rear, one on each side of the vertical centerline as far as practicable, to indicate the extreme width of the trailer.
7
Pole trailers, when towed by motor vehicles with rear identification lamps and mounted at a height gre
ater than the load being transported on the pole trailer, are not required to have rear identification lamps.
8
Pole trailers shall have on the rearmost support for the load: (1) two front clearance lamps, one on each side of the vehicle, both on the same level and as high as practicable to indicate the overall width of the pole trailer; (2) two rear clearance lamps, one on each side of the vehicle, both at the same level and as high as practicable to indicate the overall width of the pole trailer; (3) two rear side marker lamps, one on each side of the vehicle, both on the same level, not less than 375 mm (15 inches) above the road surface; (4) two rear reflex reflectors, one on each side, both on the same level, not less than 375 mm (15 inches) above the road surface to indicate maximum width of the pole trailer; and (5) one red reflector on each side of the rearmost support for the load. Lamps and reflectors may be combined.
9
Any motor vehicle transporting a load that extends more than 102 mm (4 inches) beyond the overall width of the motor vehicle shall be equipped with the following lamps in addition to other required lamps when operated during the hours when headlamps are required to be used.
(1) The foremost edge of that portion of the load that projects beyond the side of the
vehicle shall be marked (at its outermost extremity) with an amber lamp visible from the front and side.
(2) The rearmost edge of that portion of the load that projects beyond the side of the vehicle shall be marked (at its outermost extremity) with a red lamp visible from the rear and side.
(3) If the projecting load does not measure more than 914 mm (3 feet) from front to rear, it shall be marked with an amber lamp visible from the front, both sides, and rear, except that if the projection is located at or near the rear it shall be marked by a red lamp visible from front, side, and rear.
10
Projections beyond rear of motor vehicles. Motor vehicles transporting loads that extend more than 1,219 mm (4 feet) beyond the rear of the motor vehicle, or that have tailboards or tailgates extending more than 1,219 mm (4 feet) beyond the body, shall have these projections marked as follows when the vehicle is operated during the hours when headlamps are required to be used:
(1) On each side of the projecting load, one red side marker lamp, visible from the side, located so as to indicate maximum overhang.
(2) On the rear of the projecting load, two red lamps, visible from the rear, one at each side; and two red reflectors visible from the rear, one at each side, located so as to indicate maximum width.
11
To be illuminated when tractor headlamps are illuminated.
12
Every bus, truck, and truck tractor shall be equipped with a signaling system that, in addition to signaling turning movements, shall have a switch or combination of switches that will cause the two front turn signals and the two rear signals to flash simultaneously as a vehicular traffic signal warning. The system shall be capable of flashing simultaneously with the ignition of the vehicle on or off.
13
To be actuated upon application of service brakes.
14
Backup lamp required to operate when bus, truck, or truck tractor is in reverse.
15
(1) For the purposes, the term "overall width" refers to the nominal design dimension of the widest part of the vehicle, exclusive of the signal lamps, marker lamps, outside rearview mirrors, flexible fender extensions, and mud flaps.
(2) Clearance lamps may be mounted at a location other than on the front and rear if necessary to indicate the overall width of a vehicle, or for protection from damage during normal operation of the vehicle.
(3) On a trailer, the front clearance lamps may be mounted at a height below the extreme height if mounting at the extreme height results in the lamps failing to mark the overall width of the trailer.
(4) On a truck tractor, clearance lamps mounted on the cab may be located to indicate the width of the cab, rather than the width of the vehicle.
(5) When the rear identification lamps are mounted at the extreme height of a vehicle, rear clearance lamps are not required to be located as close as practicable to the top of the vehicle.
16
A trailer subject to this part that is less than 1,829 mm (6 feet) in overall length, including the trailer tongue, need not be equipped with front side marker lamps and front side reflex reflectors.
17
A boat trailer subject to this part whose overall width is 2,032 mm (80 inches) or more need not be equipped with both front and rear clearance lamps provided an amber (front) and red (rear) clearance lamp is located at or near the midpoint on each side so as to indicate its extreme width.
