Where should ABS indicators typically be mounted on trailers?
- At the rear of the trailer
- On the top of the trailer
- On the sides of the trailer
- Locations that make them visible in your rear-view mirror ✓
Answer: D. Locations that make them visible in your rear-view mirror
Trailer ABS indicators should be mounted in locations that make them visible in your rear-view mirror.
Why this is the answer
The Air Brake Handbook says that while ABS indicator lights are mounted on the dashboard or driver console in the cab, trailer indicators are usually placed where they can be seen in your rear-view mirror. It also says you should know where the ABS indicators are on your vehicle and how they work. So the key point is not a fixed spot like the rear, top or side of the trailer, but a mounting location that lets you see the indicator from the driver's seat.
Why the other answers are wrong
- A. At the rear of the trailer — The rear of the trailer is not the rule given; the handbook says trailer indicators are placed where they can be seen in your rear-view mirror.
- B. On the top of the trailer — The top of the trailer is not the rule given; visibility in your rear-view mirror is what the handbook calls for.
- C. On the sides of the trailer — The sides of the trailer are not the rule given; the handbook focuses on a location visible in your rear-view mirror.
Remember it
Think driver's-eye view: if you cannot see the trailer ABS lamp in your mirror, it is not where the handbook expects it to be.