You want a timer that will (when a button is pressed) produce a short pulse to start a wiper sweep, then wait a specified time (10 seconds?) and produce another short pulse. Is that correct?
not exactly - i intend to use the existing circuits. In essence I need to simulate the park function which is absent on my wiper motor (self-parking)
The Park, has a 12VDC + NC from the wiper motor when the wiper is not in the park, This goes to the delay unit, when the wiper in park the 12VDC is cut (open). The delay unit uses this the 'time/trigger' the wiper delay. As above my self park does not have this circuit.
The wiper sweep is consistent - 3.5 seconds - so hence the need above