How can you detect your indicator is defective?

In this case, the correct combination for detecting a defective indicator involves choices 1 and 2.

Choice 1 states that the indicator control lamp flashes faster than normal. This is a clear indication of a bulb failure; typically, when one of the indicator bulbs is out, the remaining ones will flash at a quicker rate.

Choice 2 highlights the importance of performing a functionality test before moving off. This test ensures that all lights, including indicators, are working properly, which is a crucial safety step for all drivers.

Choice 3, which you included in your answer, about the control lamp being permanently illuminated red, is not relevant in this context. In German traffic law, a permanently lit indicator control lamp typically signals a malfunction rather than providing clear detection of a specific defective indicator.

Selecting the correct combination matters because it reinforces the importance of regular vehicle checks and proper signaling, which enhances road safety by ensuring indicators function correctly to communicate your intentions to other road users.