Harley Davidson Forums

Engine Mechanical Topics Discussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.

Code U-1255

Thread Tools
 
Search this Thread
 
Old Aug 19, 2023 | 04:06 AM
Share
  #1  
Dilligafo's Avatar
Dilligafo
Thread Starter
|
4th Gear
Joined: Feb 2023
Posts: 8
Likes: 0
From: Georgia
Default Code U-1255
My 2004 Fatboy is giving U-1255 code anyone else had this no blinkers and won't start
 
Reply
0
Old Aug 19, 2023 | 04:54 AM
Share
  #2  
Jackie Paper's Avatar
Jackie Paper
Seasoned HDF Member
15 Year Member
Community Builder
Liked
Top Answer: 1
Joined: Mar 2010
Posts: 38,668
Likes: 6,462
From: Honah Lee
Default
Will look it up later when I grab manual.

PS...Welcome, Edwin.
​​​​
Hope you enjoy your ride here.

Only as a suggestion, create a signature
line for your bike, year, model, and all the
code letters.

You can add that bike photo to the signature too.

And also as a suggestion , make your next new post over in the new member welcome area to say hello.
 
Last edited by Jackie Paper; Aug 19, 2023 at 04:56 AM.
Reply
0
Old Aug 19, 2023 | 05:46 AM
Share
  #3  
Hammerhead Pat's Avatar
Hammerhead Pat
Grand HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Apr 2010
Posts: 3,592
Likes: 1,153
From: Brandon,Fl
Default
Have you checked the fuses ?
 
Reply
0
Old Aug 19, 2023 | 06:16 AM
Share
  #4  
Jackie Paper's Avatar
Jackie Paper
Seasoned HDF Member
15 Year Member
Community Builder
Liked
Top Answer: 1
Joined: Mar 2010
Posts: 38,668
Likes: 6,462
From: Honah Lee
Default
Originally Posted by Dilligafo
My 2004 Fatboy is giving U-1255 code anyone else had this no blinkers and won't start
It's not seeing the CSP. Engine does not know were pistons are to set timing. Won't fire plugs like that.

Will it crank? (turn over from starter motor)

Need to know if is carburetor or FI.

Read this.. may eliminate us a lot of texting and then get back here and let me know what you think?

https://www.hdforums.com/forum/softa...ont-start.html
 
Last edited by Jackie Paper; Aug 19, 2023 at 06:23 AM.
Reply
0
Old Aug 19, 2023 | 08:32 PM
Share
  #5  
Dilligafo's Avatar
Dilligafo
Thread Starter
|
4th Gear
Joined: Feb 2023
Posts: 8
Likes: 0
From: Georgia
Default Won't crank or no blinkers replaced blown fuses, yes on carb
Originally Posted by Jackie Paper
It's not seeing the CSP. Engine does not know were pistons are to set timing. Won't fire plugs like that.

Will it crank? (turn over from starter motor)no it won't even turn over

Need to know if is carburetor or FI. Yes on carb

Read this.. may eliminate us a lot of texting and then get back here and let me know what you think?

https://www.hdforums.com/forum/softa...ont-start.html
No it won't crank or turn over basically dead to start button and I checked kill switch.
it's also a carburetor
 
Reply
0
Old Aug 19, 2023 | 09:21 PM
Share
  #6  
Jackie Paper's Avatar
Jackie Paper
Seasoned HDF Member
15 Year Member
Community Builder
Liked
Top Answer: 1
Joined: Mar 2010
Posts: 38,668
Likes: 6,462
From: Honah Lee
Default
What's battery voltage? What is it when you hit start?
Doed headlight come on?
 
Reply
0
Old Aug 20, 2023 | 04:11 AM
Share
  #7  
Dilligafo's Avatar
Dilligafo
Thread Starter
|
4th Gear
Joined: Feb 2023
Posts: 8
Likes: 0
From: Georgia
Default
Originally Posted by Jackie Paper
What's battery voltage? What is it when you hit start?
Doed headlight come on?
Headlight comes on as well as led display voltage is 12.8 but the start button doesn't engage starter have power everywhere except coming out of starter relay. The green/brown wire has nothing
 
Last edited by Dilligafo; Aug 20, 2023 at 04:12 AM.
Reply
0

Trending Topics

Old Aug 20, 2023 | 05:16 AM
Share
  #8  
pgreer's Avatar
pgreer
Stellar HDF Member
Liked
Loved
Community Favorite
Top Answer: 1
Joined: Aug 2020
Posts: 3,192
Likes: 2,235
From: College Station, TX
Default
Does your bike have a security system? It sounds like a TSSM (turn signal / security module) problem.

Paul
 
Reply
0
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom

 Verdad Gallardo
story-1

6 Weirdest Harley-Davidsons Ever Sold to the Public

 Verdad Gallardo
story-2

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-3

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-4

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-5

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-6

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

 Verdad Gallardo
story-7

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

 Verdad Gallardo
story-8

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-9

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
Old Aug 20, 2023 | 07:11 AM
Share
  #9  
Jackie Paper's Avatar
Jackie Paper
Seasoned HDF Member
15 Year Member
Community Builder
Liked
Top Answer: 1
Joined: Mar 2010
Posts: 38,668
Likes: 6,462
From: Honah Lee
Default
Originally Posted by Dilligafo
Headlight comes on as well as led display voltage is 12.8 but the start button doesn't engage starter have power everywhere except coming out of starter relay. The green/brown wire has nothing
Not an expert here. Probably either the 15A ignition or battery fuse. Or ignition switch or 30 amp circuit breaker. Is your check for power now.



 
Last edited by Jackie Paper; Aug 20, 2023 at 07:18 AM.
Reply
0
Old May 10, 2024 | 06:24 PM
Share
  #10  
Halcon's Avatar
Halcon
Stage I
Joined: May 2024
Posts: 1
Likes: 0
From: California
Default Did you fix you problem ? I have the same issue.
Originally Posted by Dilligafo
My 2004 Fatboy is giving U-1255 code anyone else had this no blinkers and won't start
i have the exact issue, did you find out ?
 
Reply
0
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
2004 Fatboy will not crank
Dilligafo
Softail Models
0
Aug 6, 2023 10:20 AM
Code: ECM PO113 Hist
IronMan69
Sportster Models
3
Apr 7, 2019 01:22 PM
Coupon code for Softbrake
heavymetalthunder
General Harley Davidson Chat
0
May 5, 2018 11:02 AM
1632 code
Bop49
Ignition/Tuner/ECM/Fuel Injection
4
Aug 26, 2014 01:38 PM
Trouble code diagnostics
HDF Tech
General Topics/Tech Tips
0
Jul 21, 2005 10:41 AM
Back to Subforum
Engine Mechanical Topics
View Next Unread
2023 Ultra Limited SE8-447 torque cam impressions




Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 10:37 PM.

story-0
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom

Slideshow: Killer Custom's latest build relies on styling changes rather than performance upgrades, giving the cruiser an entirely different personality.

By Verdad Gallardo | 2026-06-03 18:28:05


VIEW MORE
story-1
6 Weirdest Harley-Davidsons Ever Sold to the Public

Slideshow: From military-inspired singles to scooters and three-wheel utility vehicles, these Harleys took the company far outside its comfort zone.

By Verdad Gallardo | 2026-06-02 18:34:10


VIEW MORE
story-2
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-3
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-4
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-5
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-6
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-7
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-8
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-9
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