Help with headlight flash

[Andybratt]

Hope some one can help. Just picked up my first cerbera 98 4.2 this weekend.
Have an mot booked tomorrow but can't get the headlamps to flash.
The lights work on the switch, side, dip and main and the button on the steering wheel moves between dip and high.
So switches and bulbs fine. When lights are off pressing the steering wheel button does nothing.
Anyone got any tips?

[Andybratt]

Thanks guys spot on cleaned contacts. Checked behind dash and found loose connector.