Should 18+ JMS PedalMAX work without battery connection?

[Stangnut]

Yes, I know some people don't like the PedalMAX (or other brands) There are plenty of other threads for that discussion.

I had one on my '15 GT and sold it because JMS said starting with the '18 the unit had to be connected to the battery for a signal it needed. I bought a used one on here (thanks jonrjen!) and when I hooked it up I tried it without hooking up the lead to the battery. Worked just fine and is still working after a week.

Anyone know for sure why? JMS still claims it needs the new signal from the battery.
https://www.jmschip.com/pedalmax/

18+ on the left. '15-'17 on the right
(pic from hiccup https://www.mustang6g.com/forums/threads/pedalmax.84077/page-4#post-2264135)

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[fiveoboy01]

Did you contact JMS? I assume they could tell why it needs battery power.

 

[Stangnut]

Yes. Like I said they claim it needs a signal from the battery. The 15-17 had that signal in the pedal and the 18+ doesn't have that anymore.

 

[Stangnut]

bump?

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