rear stop light flasher

Hi there, im in the UK and want to add summat to my car so the brake lights flash on and off from a switch.

can anybody post up a diagram to acheive this??

there is one hitch tho...i have a third high level brake light, and would need to isolate this from the flashing circuit, or if it is possible....to make this flash in an opposite sequece to the normal brake lights?!

Hope someone can help, thanx 

hi there

yeah i want it so i can activate the system by switch, to run itself, not when i touch the brake light. This kind of device is used in the UK by the emergency services, but looks very effective, i often have to stop in dangerous places on dark roads when im at work so need a setup like this so my car can be seen and not crashed into!!!

hope this helps....a wiring diagram and what i will need would help greatly, thanx

oh that sounds promising!!!

yeah but hazards alone have proved not to be as eye catching (i found that out after 2 new bumpers!)

ive sent you a PM regards the diagram mate, thanks so much.

did you get my email mate?!

i think that i may have worked out the pins on your diagram...correct me if im wrong from the layout below (im using the way up you drew them?!)

                                                      87

                                   86              87a            85

                                                      30