Blown fuse. Vrod codes U1096 and U1255 : Motorcycle Rider Blog. Behind the scenes of VRIDETV, Canada's motorcycle touring and travel site.
Motorcycle blog

Blown fuse. Vrod codes U1096 and U1255

by Editor on 08/04/16

Our 2003 Harley-Davidson Vrod is having some electrical issues, it keeps blowing the 15Amp battery fuse. Here's the scenario:

Vrod fuse box cover

No speedo, odometer or clamshell light.

Here are the codes:

P> P1481 Current Fan output open/low 4.15 FAN OPERATION CHECK

S> U1255 Current Missing response-at IM 4.33 DTC U1096, U1255

S> U1096 Current Loss of IM serial data-at TSSM 3.20 DTC U1096, U1255

C> None

Once I cleared the codes they didn't come back.

I had a HD dealership look at it and they diagnosed it as a relay (Gray) 

Happened again…blew the same fuse (so they were historic not current)

I replace the fuse and tried to recreate the scenario: I started up the bike and let it run until the fans came on, both upper and lower came on, then cycled off. I left it running to see if the fans would continue to cycle on and off.. they did, 5 times and during the 6th time while the fan was running I gave it a little throttle and it blue the fuse. (my guess is that was a coincidence)

Then I shut the bike off and a small puddle of coolant was noticeable on the left side of the bike, I'm assuming that was from the overflow tube.

History of bike: 03 Vrod it only has 10,700 kms. The owner before me didn't ride it for a couple of years.

I definitely inherited this problem from the previous owner, I found a package of 15amp fuses in a small pocket of the saddlebags that originally came with the bike. Sure would have been nice if he told me there was a problem...

I posted all of this on a Vrod group on Facebook and received an overwhelming amount of help from fellow riders. It's so cool that they took the time to read my post and shared their thought on how to solve the mystery. After making a list of all the suggestions I began going through the bike checking off "To dos". 

vrod electrical

Grounds checked and cleaned

Fan connectors cleaned and disconnected/reconnected 4 times to scuff terminals

Started the bike let it warm up, both fans cycled on and when they did, I noticed a brief drop in the engine idle. let the fans run for a minute then revved the bike a little and the fuse blew again...

I replaced the fuse, restarted the bike, turned it off to check codes.

Here are the codes:

P > U1096

S > U1096

C > none

After writing down the codes I cleared them, turned off the ignition, then restarted the bike, turned it off and checked the codes again. There were none, showing that the were historical not current.

It was good to see no codes show up but the issue was still not resolved.

At this point there might have been some swearing....

I'll be the first to admit that this is now something beyond my skill set, an HD tech with a multimeter and a Harley-Davidson "Breakout Box" (speciality tool) will now have to be the one to solve this problem.

Vrod codes U1906 and U1255

Comments (0)


Leave a comment


pinterest
instagram
tumblr
youtube
Jeff Pennock's personal facebook
VRIDETV facebook business page
<----   Connect with VRIDETV in social media   ----->
Tik Tok VRIDETV
Motorcycle adventures on X