ECM to Thunder Max question

Discussion in 'Electrical' started by bcortani, Apr 17, 2015.

  1. bcortani

    bcortani Active Member

    Hi all. Quick question. Almost there...On my 2008 Softail Heritage Classic, I am installing a Thunder Max (open loop) to replace the bad ECM. I have the security system on the bike. Do I have to re-learn the TM to the bike before install of map or do I power up the TM, download map then relearn to the system?? Thanks.:newsmile024:
  2. Jack Klarich

    Jack Klarich Guest

  3. biscuit

    biscuit Junior Member

    The security system works regardless of the ECU you have on your bike.
    HOWEVER, you will need to disarm it when you disconnect the battery to fit your T/max.
    Put it into service or transport mode or whatever. (service mode ,I think)

    One question: why did you go for the Open Loop set up? Was it a cost thing or were you referred that way?
    Open Loop tuning is w-a-a-y more difficult to use and tune, than the Autotune option.

    Good luck with it.
  4. Jack Klarich

    Jack Klarich Guest

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