My galaxy 2.3 si will not start. When I crank the engine over the red light on the door flashes quickly. There is no spark at the plugs. I have read this may be down to a relay, if so where would I find it and what dose it do?
Any help welcome.

 

I think the red light is a red herring, ie nothing to do with the problem.
You could check the main power control relay, is putting power to the ecu.
tabetha