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Thread: "tow haul mode" on nnbs E38 ecm and tcm?

  1. #1
    Join Date
    Dec 2012
    Location
    Pasadena, Tx
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    15

    "tow haul mode" on nnbs E38 ecm and tcm?

    hey guys I need help with wiring up a tow/haul switch to my swap, ive seen people do it but on gen3 ecms....

    I have a nnbs 5.3 with a E38 ECM and a TCM any feedback will help, thanks.
    Obs 5.3 Tuned by Cesar @2Bar Racing

  2. #2
    Join Date
    Nov 2009
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    SAN ANTONE
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    781
    you would need to run those circuits through the gen 4 BCM and have all the comm lines hood up so that the ECM sees the signal that it is being toggled on and off
    06 rcsb, 6two, 231/235, 4.11, pacesetter, 80e, 14 bolt, Nelson tuned
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  3. #3
    Join Date
    Mar 2013
    Location
    Long Beach California
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    637
    not to hijack but i been wondering this ever since i did my swap...and now seems a perfect time to ask... is tow/haul mode possible through a simple switch (which i doubt) or is it through "class 2 data" which is obviously more involved.... (which im pretty sure it is). id love to add this to my dash but if its through " PCM talk" then its not gonnna happen in my case....
    Like Tumbler in "Gone in 60" I'll drive anything with wheels or without

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