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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 Ff - Power Steering Pressure Switch (PSPS) >> Test Ff: Step 9
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Test Ff: Step 9

9) Check PSPS State With KOER: Load & No Load  Install breakout box and connect ECA. Connect PSPS and set DVOM on 200-ohm scale. Start engine and allow it to idle. Measure resistance between test pin No. 24 (test pin No. 3 on 2.3L OHC PFI) and test pin No. 46 at breakout box. Turn steering wheel 1/2 turn and return to center position. If resistance changes from less than 10 ohms to infinity (indicating PSPS opening) and then returns to 10 ohms or less (when steering wheel is centered), PSPS system is okay. Remove breakout box and return to QUICK TEST. If reading did not change as indicated, go to next step.