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Home >> Ford >> 1990 >> Bronco II 4WD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test FD - Brake On/Off (Boo) Switch >> Test FD: Step 10
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Test FD: Step 10

10) Code 74: Verify Brake Pedal Was Depressed  Code 74 indicates that when brake pedal was depressed and released during KOER Self-Test, the BOO signal did not cycle high and low. Possible causes for this fault are: brake pedal was not depressed and released during the KOER Self-Test, brake pedal was depressed during entire KOER Self-Test, open in BOO/brakelight circuit, short to GROUND or POWER, or faulty ECA. If brake was NOT depressed during KOER Self-Test, repeat test and depress and release brake pedal ONLY once during test. Depress and release brake pedal AFTER dynamic response code but before brief WOT. If pedal was depressed, go to next step. If pedal was depressed correctly during self-test, go to next step.