Question 119 of 140

If the trailer's ABS malfunctions but the tractor's ABS still works, how should this affect a driver's approach to braking?

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Brake with extra caution, since the trailer wheels could still lock up and contribute to a skid
No adjustment is needed since the tractor's ABS automatically covers braking for the whole combination
The vehicle should not be driven under any circumstances
Brake only with the parking brake until repairs are made

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Correct answer to question 119 (Combination Vehicles): Brake with extra caution, since the trailer wheels could still lock up and contribute to a skid

Why

If the trailer ABS is not functioning, its wheels can still lock up under hard braking even though the tractor's wheels are protected, so extra caution is needed until the trailer's system is repaired.

Updated: November 2026

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If the trailer's ABS malfunctions but the tractor's ABS still works, how should this affect a driver's approach to braking?

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