ECM reset
Road Warrior
Joined: Nov 2007
Posts: 1,800
Likes: 307
From: Houston, Texas
What year and model? If it's throwing codes for TPS then it may need the ignition cycled a few times to reset all the zero's on the throttle. Literally turn everything on but don't try to start it, count to three, then turn it off at the key switch. Count to three and do it again. Cycle three or four times then try it.
You installed a new wiring harness? I doubt the ecm is your problem. I'd double and triple check you have your end connections are right. Might find one or two hooked backwards..
You installed a new wiring harness? I doubt the ecm is your problem. I'd double and triple check you have your end connections are right. Might find one or two hooked backwards..
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,771
Likes: 6,505
From: Honah Lee
Unplugging it and plugging it back in would be no different than changing the battery. What was the bike doing before you changed the main wiring harness. If security was set and not disarmed, unplugging ECM and then replugging it will require a reset from the Harley 's computer
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randyw
Ignition/Tuner/ECM/Fuel Injection
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Aug 29, 2020 12:06 PM
