Topaz V6-182 3.0L (1992)
Main Relay (Computer/Fuel System): Description and Operation
The Electronic Control Assembly (ECA) receives its operating voltage from the ECA power relay. When the ignition switch is turned ON, the normally
OPEN contact points of the relay CLOSE and supply power to the ECA. The control coil circuit of the relay contains a diode, wired in series, to prevent
relay operation if the battery polarity is reversed, preventing damage to the ECA.