Why should you inspect the electrical connections at every trailer and dolly junction?

Pick an answer

1. Only the tractor's own lights matter for being seen by other traffic
2. Electrical checks are optional as long as the inspection happens during the day and visibility is already good out on the lot beforehand
3. So that lights and turn signals work correctly on every trailer, keeping the whole combination visible to other traffic
4. Electrical connections on a trailer only affect the radio

Correct!

Not quite. The correct answer is highlighted.