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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 TC - E4OD Transmission >> Test TC: Step 25
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Test TC: Step 25

25) Check Solenoid Driver Signal  With key off, install breakout box and leave ECA connected. Disconnect transmission bulkhead connector. Connect a test light between test pin No. 37 or 57 and the ECA signal test pin (refer to table in step 12)) at the breakout box. With KOEO, wait 10 seconds. Initiate KOEO Self-Test. If test light flashes momentarily and then stays off, repair transmission solenoids as necessary, driver signal is okay. If test light does not flash, replace ECA, reconnect solenoid(s) and rerun QUICK TEST. If test light is always on, solenoid driver is shorted to ground in ECA. Replace ECA, reconnect solenoid(s) and rerun QUICK TEST.

NOTE: There is a break in the step numbering sequence at this point, skipping from step 25) to step 30). Break is due to previous chart references to these testing procedures. No test procedures have been omitted.
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