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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 Fa - Neutral Drive Switch (NDS) A/C Input >> Test Fa: Step 13
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Test Fa: Step 13

13) Check Neutral Drive Input  With key off, ensure transmission is in Park or Neutral. Disconnect ECA, inspect pins, and install breakout box. Reconnect ECA. Disconnect 16-pin connector from 4EAT transmission module. Set DVOM on 20-volt scale. With KOEO, measure voltage between test pin No. 30 at the breakout box and chassis ground. If voltage is less than one volt, replace ECA. Remove breakout box and reconnect all components. Repeat QUICK TEST. If voltage is not less than one volt, go to next step.

Fig 1: Checking NDS Input Circuit
G90A12419