p1682

1998 JEEP WRANGLER TJ
96,000 MILES
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THEONETRUEDOUG
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  • 1 POST
Ck gauges light come on after a few minutes or accelleration. Replaced battery and alternator (twice). Volt meter starts at 14v and goes to 0 after few minutes or when accellarating. The same sequence happens at every start, battery eventually needs charging for the car to start and. Forums suggest the PDM (PCM) HAS ISSUES? I want to know how th check the pdm/pcm for malfunction and how to repair it.
May 13, 2013 at 1:06 PM
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CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
Measure the voltages on the two small wires and the larger output wire on the alternator while the problem is occurring and the engine is running. Holler back with those numbers.
May 13, 2013 at 10:40 PM
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