One idea from a customer was to add an additional flashing light to a vehicle's brake lights, so that this light would turn on every time the brakes were applied, but only for 3 seconds (the regular brake lights would stay on continuously after this). For this, he had found a flashing LED light (the flasher function was built in), but needed a way to make it only stay on for 3 seconds.
The TDR-M momentary time-delay relay makes this work. By connecting the extra flashing light to the TDR-M relay, and triggering it from the brake light, the flashing light will come on for 3 seconds (or whatever time period you prefer), and then turn off, until it is triggered again by a new application of the brakes.
Note that the TDR-M has no flashing function of its own; you will need a light with its own flasher to do this.
Example 1: Flashing Brake Light with TDR-M