12 Valve Engine and Drivetrain Talk about the 12V engine and drivetrain here. This is for 1994-1998.5 engine and drivetrain discussion only.

47re no overdrive

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Old 02-18-2014, 08:33 PM
  #16  
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Talked to the alternator shop about the two wire plug (blue and green wire) coming out of the back of the alternator. We came to the conclusion one of these two wire needed to be hooked up...12+ or....
So I began with a fused wire from batt/12+ to the blue wire, drove truck and could immediately tell everything was back to shifting as normal.
Will drive on the hwy tomorrow but I expect the same normal shifting. This has been very frustrating but all along, I believe the voltage regulator within the PCM failed or has shorted out for some unknown reason.
Old 02-19-2014, 08:07 AM
  #17  
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Originally Posted by high bid
Trans shop found codes and were stumped as well
P1389-no automatic shutdown relay output voltage at PCM
P1694-no engine bus message received
P1693-mil fault in companion module

No ASD relay voltage at PCM says perhaps your ASD relay is not being brought in.

Do you have a FSM to trace the power to ASD?

Trans will not go into overdrive if it does not think it is running, shouldn't have cruise working nor AC.
Old 02-19-2014, 09:09 AM
  #18  
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I will follow up on cruise and AC working. Thanks!
Old 02-28-2014, 05:22 AM
  #19  
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Originally Posted by high bid
I will follow up on cruise and AC working. Thanks!
All seems to be back to normal, shifting properly and all other functions.
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