Milwaukee Eight (M8) 2017 and up M8 Air and Liquid Cooled discussion
Sponsored by:
Sponsored by:

2021 Ultra limited battery terminal access

Thread Tools
 
Search this Thread
 
Old Apr 23, 2021 | 04:24 PM
  #1  
tpcowfish's Avatar
tpcowfish
Thread Starter
|
Road Warrior
Joined: Sep 2013
Posts: 1,926
Likes: 193
From: ohio
Default 2021 Ultra limited battery terminal access

Wow, took seat off, trying to get to battery terminals, can't just clip the ecm out of the way, like my 2014, wires, plug connectors everywhere , having a rough time getting to terminals to add something, anyone else try it ?
 
Reply
Old Apr 24, 2021 | 09:46 AM
  #2  
jammerx's Avatar
jammerx
Stellar HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Aug 2007
Posts: 2,052
Likes: 341
From: Virginia Beach
Default

Picture?
 
Reply
Old Apr 24, 2021 | 12:12 PM
  #3  
Robert Fulmer's Avatar
Robert Fulmer
Intermediate
Joined: Jul 2012
Posts: 49
Likes: 31
From: Nazareth, PA
Default

Not too easy as it was a few years ago. Pretty crowded with wiring alone. I had to remove a couple of nuts and wrestle the plastic cover to gain access to the positive post.
 
Reply
Old Apr 24, 2021 | 12:17 PM
  #4  
TwiZted Biker's Avatar
TwiZted Biker
Club Member
15 Year Member
Loved
Community Favorite
Top Answer: 10
Joined: Mar 2009
Posts: 66,106
Likes: 51,387
From: Niles Canyon Ca.
Default

Yeah it's buried, changed the battery in my 17 Road King a few weeks back, lotta crap in the way now.
 
Reply
Old Apr 24, 2021 | 02:40 PM
  #5  
tpcowfish's Avatar
tpcowfish
Thread Starter
|
Road Warrior
Joined: Sep 2013
Posts: 1,926
Likes: 193
From: ohio
Default

Did you have to unplug anything, that's what I'm trying to do, get to the post, without unplugging everything, going through service manual, I don't know if I should pull the main fuse, or unplug everything and plug back after access, something about alarm,ect, this new bike has like four plug ins on top of the ecm, I'll try to get a picture, sounded easy in the service manual,
 
Reply
Old Apr 24, 2021 | 03:15 PM
  #6  
tpcowfish's Avatar
tpcowfish
Thread Starter
|
Road Warrior
Joined: Sep 2013
Posts: 1,926
Likes: 193
From: ohio
Default


This is the picture, tray bolts are out
 
Reply
Old Apr 24, 2021 | 03:18 PM
  #7  
tpcowfish's Avatar
tpcowfish
Thread Starter
|
Road Warrior
Joined: Sep 2013
Posts: 1,926
Likes: 193
From: ohio
Default

All the wiring is connected to the tray, main harness is zip tied to frame, also impeding removal
 
Reply
Old Apr 24, 2021 | 03:19 PM
  #8  
smitty901's Avatar
smitty901
Seasoned HDF Member
Veteran: Army
15 Year Member
Liked
Community Favorite
Joined: Feb 2008
Posts: 22,999
Likes: 11,439
Default

Anytime you are messing with the wires Pull the main fuse.
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-1

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-4

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-5

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-6

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-7

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-8

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-9

Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

 Verdad Gallardo
Old Apr 24, 2021 | 07:15 PM
  #9  
Hammz's Avatar
Hammz
Grand HDF Member
Veteran: Air Force
10 Year Member
Community Favorite
Joined: Sep 2013
Posts: 3,820
Likes: 587
From: Michigan
Default

Originally Posted by tpcowfish
Wow, took seat off, trying to get to battery terminals, can't just clip the ecm out of the way, like my 2014, wires, plug connectors everywhere , having a rough time getting to terminals to add something, anyone else try it ?
What are you trying to add? Most add ons can be done w/o direct connection to battery posts.
 
Reply
Old Apr 25, 2021 | 04:10 AM
  #10  
jellopis's Avatar
jellopis
Intermediate
15 Year Member
Liked
Loved
Community Favorite
Joined: Feb 2008
Posts: 44
Likes: 17
From: Alicante Spain
Default

Maybe this device can help you

Innovv Power Hub
 
Reply



All times are GMT -5. The time now is 10:54 PM.

story-0
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-1
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-2
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-3
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-4
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-5
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-6
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-7
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-8
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE
story-9
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

Slideshow: Graeme Billington's left-hand-drive Shovelhead is as much about problem-solving as it is about classic Harley form.

By Verdad Gallardo | 2025-12-30 11:27:08


VIEW MORE