Britannia/603 Flasher Relay location

[roybatute]

Your problem may not be the flasher unit at all. When you operate the hazard light switch you not only make connections but you also break others. The idea is that the hazard lights and indicators should not operate at the same time. It is the case with most switches that they have an on and an off position. In the on position they make contacts and in the off position they break contacts. In the case of the hazard switch you can think of the "off" position as "enable indicators" and the "on" position as "disable indicators and switch on hazard warning lights". When you move the switch to the off position it makes the contacts needed for the flashers to operate - or not if the contacts are dirty. Working the switch back and forth will often clean the contacts and restore normal operation. If you do need to find the flasher unit which is a different unit to the one used by the hazard lights you might find it behind the dash on the drivers side towards the middle of the car.