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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 Kc - Air Management System (Am1/Am2) >> Test Kc: Step 12

Test Kc: Step 12

12) Check For Shorts to Power Circuit  Turn key off and wait 10 seconds. Set DVOM on 200-k/ohm scale. Leave breakout box installed with ECA and solenoids disconnected. Measure resistance between test pin No. 51 (No. 38 on 5.0L MA PFI) and test pins No. 37 and 57, and between test pin No. 11 (No. 32 on 5.0L MA PFI) and test pins No. 37 and 57. If any reading is less than 10 k/ohms, repair short to power. Remove breakout box, connect harness to ECA and repeat QUICK TEST. If all readings are 10 k/ohms or more, replace ECA, remove breakout box, reconnect AM1/AM2 solenoid and repeat QUICK TEST.