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post #1 of 10 (permalink) Old 08-19-2015, 09:35 AM Thread Starter
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thundermax and kill switch

Hey all you thundermax users I have a friend that recently purchased a 2009 ultra classic cvo just before pulling out out the dealership the mechanic came out and told him to never use the kill switch because if he did the thundermax would loose its program and bike would not run is there any truth to this thanks for all help in advance
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post #2 of 10 (permalink) Old 08-19-2015, 09:47 AM
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No it will still work the same as it did before


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post #3 of 10 (permalink) Old 08-19-2015, 11:25 AM
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That's news to me.
I use the kill switch all the time and never had a problem.
As a matter of fact, I don't recall reading that in the instructions when I installed my Thundermax.
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post #4 of 10 (permalink) Old 08-19-2015, 11:32 AM
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Had the Thundermax on my classic, used the kill switch all of the time. Never had an issue.

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2017 Lagauna Orange FLTRX, 2013 Candy Orange Road Glide Custom (traded), 2010 Ultra Classic (traded), 2004 Classic (sold to little brother), 1999, Classic (traded), 1999 Road King (best handling so far), 1994 Softail Custom (traded), 1974 Superglide (I miss her still).
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post #5 of 10 (permalink) Old 08-19-2015, 11:45 AM
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No, it will not lose its programming. But if power is lost to the T-Max (battery disconnected, ECM fuse pulled, main fuse pulled), it will not recognize the sensor settings on the bike. The program will be intact. So if you lose power to the T-Max, you should cycle the power 30 seconds on, then 30 off, and repeat for 3 full cycles. This allows the T-Max to reacquaint itself with all the sensors on the bike again. The install instructions come with a sticker to be placed next to the battery with this info on it. This must be what the mechanic was thinking of.

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post #6 of 10 (permalink) Old 08-19-2015, 11:46 AM
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Back 10 years ago or so there were a bunch of kill-switch urban legends going on too.
I think it was right after the skidding bearing roller epidemic.

2015 RGU CVO........under continuous change......
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post #7 of 10 (permalink) Old 08-20-2015, 02:54 PM
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I've been using the kill switch for years and was told the same thing by Chris Waddell of Cycle Solutions Racing while in Sturgis. Chris equated using the kill switch to pulling the plug on your computer to shut it down. Although I have a TMax, he said it's proper to shut down with the ignition switch regardless of the ECM. Not sure what to believe, but have been using the ignition switch lately anyway.
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post #8 of 10 (permalink) Old 08-20-2015, 02:59 PM
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Yet the CVOs dont even have an ignition switch, they use only the kill switch, so then what??

2015 RGU CVO........under continuous change......
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post #9 of 10 (permalink) Old 08-20-2015, 03:21 PM Thread Starter
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hey all thanks for your input and experience. I have been told by Tallahassee HD and Panama City HD to always use the kill switch first then ignition switch because the kill switch shuts off the fuel pump (the ignition switch also cuts off fuel pump). Sooo confused!!!! I will tell friend what you all say let him make up his own mind.

thanks
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post #10 of 10 (permalink) Old 08-22-2015, 05:15 PM
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I had a T-Max on my last bike. It is actually still out in the shop. I hear others say how great they are. Personal experience says different. Using the switch will not kill the programing. The maps while many are limited. So any mods will require trial and error tinkering with the maps.Tech support is hit and miss also.


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