Ignition Coil Power Source: Notes
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1990 Mazda RX-7, 1990 Mazda Protege, 1990 Mazda MX-6, 1990 Mazda MX-5 Miata, and 1990 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition on. Using voltmeter, check for 12 volts between positive (+) terminal and ground. If no voltage is present, check battery feed, main fuse, main relay No. 1 (MX-6 and 626 models), injector main relay (929 models), ignition switch and fusible links.