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Home >> Ford >> 1990 >> Bronco II 4WD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures >> DISTRIBUTORLESS Ignition System (Dis) - No Start (4.0L) >> Test 13, Check Coil For Failure
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Test 13, Check Coil For Failure

Connect LED test lamp from J7 (BAT-) to each coil (one at a time): J3, J6 and J10 on breakout box. Is the LED test light on and bright? If yes, go to TEST 14. If not, replace defective coil pack and check for fault codes. See TESTS W/CODES article.