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Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test TC - E4OD Transmission >> Test TC: Step 11 >> Overdrive Cancel Switch (OCS) Circuit
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Overdrive Cancel Switch (OCS) Circuit

Measure voltage between test pin No. 41 and test pins No. 40 and 60 at the breakout box while cycling the Overdrive Cancel Switch. Toggle the switch on the dash several times. If voltage cycles, remove breakout box. Replace ECA and rerun QUICK TEST. If voltage does not cycle, go to step 9) for driveability faults or next step for other faults.