Main Relay Coil Circuit
WARNING: This page is about a different car, the 1988 Buick Riviera and 1988 Buick Reatta. However, it is still accessible from the selected car via links, so may be relevant.
The main relay coil is energized by means of a 12-volt EBCM output on pin No. 8 on circuit No. 855. The EBCM supplies 12 volts on pin No. 8 only after the Ignition Enable input has been received on pin No. 2. The main relay is grounded through circuit No. 450.