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Hawaii driving lesson · Vehicle Equipment & Registration

Required and prohibited equipment

A 3-minute lesson from the Hawaii course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
3 minutes
Course unit
Vehicle Equipment & Registration
Checkpoint questions
6
Source pages
18, 19, 20

Every car on Hawaii highways must carry a set list of working equipment, and some add-ons are banned outright. You're responsible for the condition of whatever vehicle you drive, even when you don't own it.

Required equipment (all meeting established standards):

  • Brakes, steering, horn and door handles
  • Tires, wheels and wheel lug nuts
  • Exhaust system, lights, glass and windshield wipers
  • Odometer and speedometer
  • Bumpers, fenders, floor pans, hood and hood catches, and gas tank
Handbook p. 18 ↗

Prohibited equipment:

  • A red light showing from the front, or a blue light visible outside (except authorized emergency vehicles)
  • A bell, exhaust whistle or siren (except authorized emergency vehicles)
  • A muffler cut-out or by-pass, or a muffler noisier than the original manufacturer muffler
Handbook p. 18 ↗

Know the rule

You are responsible for the condition of the vehicle you are driving even though you may not be the owner.

Handbook p. 19 ↗
4 to 8 mph

Common brake test: apply brakes rather hard at this speed; the vehicle should not pull to either side

Handbook p. 19 ↗
Over 10 mph

Speed usually needed for antilock brakes (ABS) to activate

Handbook p. 19 ↗

Know the rule

With ABS, practice in an open area such as an empty parking lot, and practice NOT pumping the brake pedal. ABS activates more easily on wet, slippery surfaces.

Handbook p. 19 ↗

Know the rule

If your directional signals fail, use hand signals until they are repaired. A change in the dash indicator means improper operation.

Handbook p. 19 ↗

Know the rule

Keep the exhaust system free of leaks to prevent carbon monoxide poisoning, and replace defective parts immediately.

Handbook p. 19 ↗

Know the rule

Head lamps must work properly and be correctly adjusted at all times.

Handbook p. 19 ↗

Know the rule

Front-opening hoods have a primary latch and a secondary catch so the hood won't open and block your vision.

Handbook p. 19 ↗

Know the rule

Every vehicle must have a horn in good working condition to give audible warning.

Handbook p. 19 ↗

Maximum free play in the steering wheel

Maximum free play in the steering wheel
Steering typeMax free play
Power steering (check with motor running)2 inches
No power steering3 inches
Handbook p. 20 ↗

Know the rule

The wheel should turn smoothly from full right to full left; the vehicle shouldn't pull to either side, and the wheels shouldn't shimmy.

Handbook p. 20 ↗

Put it into practice

You borrow a friend's car and notice a blue light bar on the dash and a loud aftermarket muffler. You're the driver, so you're responsible: a blue light visible outside and a muffler louder than the original are both prohibited.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

Which of these is prohibited vehicle equipment in Hawaii?
  1. A muffler cut-out or bypass
  2. A horn in good working condition
  3. A hood with a secondary safety catch
  4. A speedometer and odometer

Answer: A muffler cut-out or bypass

A muffler cut-out or bypass, or an overly loud muffler, is prohibited equipment.

Handbook p. 18 ↗
A red light visible from the front of a private vehicle is:
  1. allowed only on pickup trucks
  2. allowed only if used at night
  3. prohibited except on authorized emergency vehicles
  4. allowed on any private vehicle

Answer: prohibited except on authorized emergency vehicles

Front-facing red lights or externally visible blue lights are prohibited except on authorized emergency vehicles.

Handbook p. 18 ↗
With power steering, how much free play is allowed in the steering wheel before it's considered defective?
  1. No more than 2 inches
  2. No more than 1 inch
  3. No more than 4 inches
  4. No more than 3 inches

Answer: No more than 2 inches

With power steering, free play should not exceed 2 inches.

Handbook p. 20 ↗
Without power steering, how much free play is allowed in the steering wheel?
  1. 4 inches
  2. 2 inches
  3. 3 inches
  4. 1 inch

Answer: 3 inches

Without power steering, up to 3 inches of free play is allowed.

Handbook p. 20 ↗
A leaky exhaust system is dangerous mainly because it can cause:
  1. carbon monoxide poisoning
  2. excess tire wear over time
  3. faster battery drain
  4. gradual brake fade

Answer: carbon monoxide poisoning

A leaky exhaust system can let carbon monoxide enter the passenger compartment.

Handbook p. 19 ↗
A muffler cut-out or bypass is legal on Hawaii roads as long as you only use it in the country.
  1. True
  2. False

Answer: False

Muffler cut-outs or bypasses are prohibited equipment regardless of where you drive.

Handbook p. 18 ↗
Take the lesson checkpoint in the app

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