AMC Coupes/Sedans/Wagons 1975-1988 Repair Information

Disabling the Interlock System

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Since the legal requirement for seat belt/starter interlock systems was dropped during the 1975 model year, those systems installed on cars built earlier may now be legally disconnected. However, the seat belt warning light is still required to operate.

  1. Remove the pink wire and terminal from the two terminal connector at the emergency starter relay, located on the right inner fender panel, under the hood.
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  3. Cut off the pink wire close to the taped junction of the wire harness.
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  5. Remove the yellow wire and terminal.
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  7. Install the yellow wire into the two terminal connector at the location where the pink wire and terminal was removed from the three terminal connector at the starter relay.
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  9. From under the right side of the dash and along the right side of the glove box area, locate the interlock logic module and remove it from its bracket. Cut off the yellow with black tracer wire close to the taped junction of the wire harness and cut off the remaining end as close to the logic module as possible. Reinstall the logic module on its dash bracket.
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  11. The warning light should be off when the occupied seat belt is buckled and the car placed in gear with the ignition switch on.
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Most models require the seating of both the driver and front seat passenger, prior to buckling of the belts or turning of the ignition system, due to the programming of the logic module for the seat belt warning light to go out. These series can be identified by a buff colored logic module. Other series are equipped with a green colored logic module which allows non-sequential operation and independent use of the seat belts.

 
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