BC Air Brake Practice · Question
A continuously illuminated yellow ABS indicator lamp on a commercial trailer after starting indicates:
A continuously illuminated yellow ABS indicator lamp on a trailer, after the initial self-test, signals a fault or malfunction within the trailer's ABS system t
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Question: A continuously illuminated yellow ABS indicator lamp on a commercial trailer after starting indicates:
Answer options:
- The trailer ABS system is functioning correctly. ✅ A malfunction in the trailer's ABS system.
- The trailer is not connected to the tractor's ABS power supply.
- The trailer's parking brakes are applied.
Correct answer: A malfunction in the trailer's ABS system.
Explanation: A continuously illuminated yellow ABS indicator lamp on a trailer, after the initial self-test, signals a fault or malfunction within the trailer's ABS system that requires attention, according to Canadian air brake handbooks.
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