Imperial Home Page -> Imperials by Year -> 1990 -> Repairs & Maintenance -> Wiring Diagram
Here is the circuit, according to FSM's and such (note- this is not a diagram out of a FSM, but is based on one).
The numbers inside the "big rectangle" represent the PCM and its pin #'s. The rectangle with the six circles is the coil pack.
This circuit was made so well, that the current 3.3/3.8 model cars use a very similar system. This circuit diagram does not show the ABS, dash wiring, or anything but the basic wires involved with the computer system. Note the two separate fan relays. That's because the computer can control either of the two fans on the radiator.
This page was last updated on October 1, 2003. Send us your feedback, and come join the Imperial Mailing List - Online Car Club