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Thread: 4l80e limp mode problem

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  1. #1
    Electronic Ignition!
    Join Date
    Mar 2016
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    18
    I think i may have found something that tells me something. When i measure reaistance between 1-2 solenoid and 2-3 solenoid i get a short(one lead on yellow/black wire and one lead on the light green wire). Doesnt matter if the ignition is on or off, it still comes up as a short. Can anybody confirm that these are two seperate circuits and are not connected to eachother?

  2. #2
    Fuel Injected! brian617's Avatar
    Join Date
    Apr 2013
    Location
    Arkansas
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    45
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    711
    If you are measuring the resistance between yellow/blk 2-3 and lt green 1-2 at the PCM plug you will see the combined resistance of both shift solenoids as they share a common voltage source.
    89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
    95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
    05 Outback XT 2.5L turbo gas auto

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