Main Relay
WARNING: This page is about a different car, the 2002 Mazda Millenia and 2001 Mazda Millenia. However, it is still accessible from the selected car via links, so may be relevant.
Remove main relay located in fuse/relay box, in left side of engine compartment. Using a DVOM, check for continuity between main relay terminals "C" and "D". See Fig 1. Continuity should not exist. Apply battery voltage to terminal "A" and ground terminal "B". Check for continuity between relay terminals "C" and "D". Continuity should exist with battery voltage applied. If continuity is not as specified, replace main relay.