John The relay gives an added boost to the coil when starting the car. It effectively bypasses the first(top) of the resistors in series. Some people have removed it and do not have any problems. It is a standard changeover relay and is not shown on the wiring diagram. If you ever have a no start problem then that area is always worth a quick check before pulling things apart. Regards Chris Vin 16327 > List, which circuit is the relay in the > engine compartment (mounted on the bracket > that holds the light switch & ignition > resistors) wired into & what is its purpose? > Is this relay just a standard relay > interchangeable with the other ones in the > relay compartment? I have a couple of extra > interchangeable relays from my relay update > kit because I also installed a fanzilla. > Can I replace this engine compartment relay > with one of these? >