SM Wiring on USA Models

UPDATED

1/2021

As noted in other sections of this article, the wiring was different on North American models. A set of schematics have been found that show USA model wiring. These schematics should be applicable to 1973 Canadian SM's as well. However 1971 and 1972 SM's in Canada are a bit of a hybrid between USA and Euro wiring.

Note that these schematics do not include wiring associated with the seat belt warning system. We believe that some of the hardware and wiring associated with the seat belts were added once the cars were in North America.

We have created a 'key' for these wiring harnesses. If readers spot any errors in our key, please let us know and we will correct it.

Key for Schematics (click to open)

USA Harness Schematic (click to enlarge)

SM USA harness schematic.jpeg

USA Functional Schematic (click to enlarge)

SM USA schematic functional.jpeg