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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 7
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Test FD: Step 7

7) Check Continuity of BOO Circuit  Turn key off. Install breakout box, leaving ECA disconnected. Set DVOM on 20O-ohm scale. Disconnect BOO circuit harness connector. Measure resistance between test pin No. 2 at the breakout box and BOO circuit at the harness connector. If resistance is less than 5 ohms, check and repair brakelight system as necessary. If resistance is greater than 5 ohms, repair open circuit. Remove breakout box, reconnect all components and repeat KOER Self-Test.

NOTE: There is a break in the step numbering sequence at this point, skipping from step 7) to step 10). Break is due to previous chart references to these testing procedures. No test procedures have been omitted.