What should a driver look for when testing the response of the trailer service brakes?

When testing the response of the trailer service brakes, a driver should be attentive to multiple indicators that can signify issues with the braking system. Delayed activation can indicate a problem with the brake system, suggesting that the brakes are not engaging quickly enough when the driver applies the brake pedal, which could compromise stopping ability. Excessive noise while testing brakes may point to wear or mechanical failure, which could also hinder the brakes' performance and lead to unsafe driving conditions.

Additionally, any signs of leaking are critical to note because leaks can decrease hydraulic pressure necessary for effective braking, ultimately leading to brake failure. Detecting any of these issues is essential in ensuring the trailer's braking system is functioning correctly, which is vital for safe operation on the road. Therefore, the most comprehensive approach involves assessing all these factors, as they collectively highlight the brakes' condition and readiness for use.