Mareas have to get by with the Brava/Brovo Haynes manual. This is not very helpful on relay locations and the car handbook gives zero info. The relay should be one of those in the main fuse box on the drivers side, I expect you have already checked the fuses there the circuit shows it as R3. Its switched via the ign but not the ign relay per this diagram, but beware it is a Brava/Bravo manual and Im sure mine is turned off if the engine is not running.
Have you tried a test light or meter on the element, it should be 12 v one side and 0 the other, 12v both sides is an earth fault. Does the warning light come on in the switch? Its in parallel with the realy coil.