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Home >> Saab >> 1993 >> 9000 L4-2290cc 2.3L DOHC Turbo EFI >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Description and Operation >> ECM Input Signals >> Brake Signal

Brake Signal

Brake Signal:

When the brake light switch closes, battery positive voltage (+30) is applied to pin 15 of the ECM. In this situation the SFI system provides basic charging pressure only.

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