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electrical help, no click, turn signal, won’t start

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  #1  
Old 6th December 2021
Viffer Viffer is offline
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Default 2007 Sportster 883 won’t start; no turn signals

I was out riding my Sportster 883 as normal. While in the ride, the red key light comes on and stays on, on the Speedo. Other than that, no changes.

When I pulled into the garage, I turn the bike off. I try to turn it back on, and nothing. I turn the ignition, flip the switch to run, I hear the fuel pump activate, and that’s all. When I push start, even in neutral with clutch in or in gear, nothing. No click, or sound, or anything.

So I check for codes. Here’s what I find:
- P: Code U1301
- S: No response
- SP: U1301, U1255
- T: I don’t have one, so no response.
I checked the ECM plug in, the TSM plug in, and the battery health, connections and ground. I have not checked for shorts in individual wires throughout the harness yet.

The TSM appears to be working, at LEAST partially, as pulling it out and moving it sideways activated the tilt sensor.

Note that this is a TSM and not as TSSM, as I do not have a fob, thus no security issues.

So it appears with the no response to the TSM, their is a short in the wiring somewhere? Does that sound right? I believe it’s telling me the ECM is short, and the Speedo is short AND is getting no data.

I also wonder what could lead to this happening all at once? I had a perfectly functioning bike that would start as always, and now it ain’t start at all.

Some things to note: it’s a stock 07 XL883 with a few aesthetic mods but nothing electrical save for an LED headlight replacing the original halogen that has worked great for thousands of miles. It has 13,500 miles on it.

When this all happened, the turn sig also stopped working. All of the fuses are in good condition, and I know the specific turn signal fuse is working, because that same fuse powers the brake light function, which is working properly.

Sorry if this was a lot, it’s my first post and I wanted to be as thorough as possible. I just want to ride my Harley again, and not having any leads has been disheartening.
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  #2  
Old 7th December 2021
shanneba shanneba is offline
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The TSM controls the turn signals and supplies voltage for the turn signals to operate.
A short on the turn signal circuits can cause the battery fuse to open.
If no short to ground is found in the battery fuse circuit check the turn
signal circuits between the TSM and the turn signals for a short to ground.
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2013 XL1200C

Find your Owner's Manual, Wiring Diagram and Parts Catalog here :

https://serviceinfo.harley-davidson....cle/lookupForm
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Use the search - enter year and model

If something doesn't work on your Sportster look here:
SportsterPedia.com
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  #3  
Old 7th December 2021
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Quote:
Originally Posted by shanneba View Post
The TSM controls the turn signals and supplies voltage for the turn signals to operate.
A short on the turn signal circuits can cause the battery fuse to open.
If no short to ground is found in the battery fuse circuit check the turn
signal circuits between the TSM and the turn signals for a short to ground.
Thanks for the reply. Are you saying check with a voltmeter? I assume you mean check the module itself for a short, and then check the harness that plugs into the TSM for a short there? Just wanted to clarify, I’m only versed in Japanese bikes so this is all fresh.

I was thinking it may be the module itself based on the healthy fuses and relays but I’m really not sure of anything at this point. I know it can’t be the whole harness/all the wires in the harness because the brake light, horn and headlight bright switch all still work fine. I’m also hoping it’s not the starter, and is just a code issue PREVENTING it from starting.
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  #4  
Old 7th December 2021
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http://sportsterpedia.com/doku.php/t...:elec02#relays

Sportsterpedia Note: The 2007-2009 model years have a significant history of corrosion and gunk collecting in the fuse/relay tray causing low-grade shorts and erratic electrical operation - This is especially problematic if the bike is left outside or operated in the rain. It's a good idea to check & thoroughly clean this entire tray at least every year (or 4 to 6 months if parked outside).

Relays are relatively inexpensive - Change them out every few years as a preventative maintenance measure.

Read over the Sportsterpedia section on Turn Signal Modules:
http://sportsterpedia.com/doku.php/t...3#turn_signals

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Old 7th December 2021
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Quote:
Originally Posted by IXL2Relax View Post
http://sportsterpedia.com/doku.php/t...:elec02#relays

Sportsterpedia Note: The 2007-2009 model years have a significant history of corrosion and gunk collecting in the fuse/relay tray causing low-grade shorts and erratic electrical operation - This is especially problematic if the bike is left outside or operated in the rain. It's a good idea to check & thoroughly clean this entire tray at least every year (or 4 to 6 months if parked outside).

Relays are relatively inexpensive - Change them out every few years as a preventative maintenance measure.

Read over the Sportsterpedia section on Turn Signal Modules:
http://sportsterpedia.com/doku.php/t...3#turn_signals

Thanks for the info. What should I use to clean the tray?

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https://www.google.com/search?q=elec...+cleaner+spray

Check the directions for issues regarding painted surfaces.


Once the tray is thoroughly cleaned, apply a coat of dielectric grease to all the tray contacts & to the new relay contacts.

Do the same for the TSM & connector.


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Old 7th December 2021
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Awesome I’ll give it a whirl
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While you're at it, I'd clean & dielectric grease the Speedo Connection & the ECM since those codes were displayed...

But, corrosion on the fuse tray can cause all kinds of havoc and strange symptons.

After the cleaning job, clear the codes and see if any return...
http://sportsterpedia.com/doku.php/t...k:ref:genmsr08


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Old 7th December 2021
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Quote:
Originally Posted by IXL2Relax View Post
While you're at it, I'd clean & dielectric grease the Speedo Connection & the ECM since those codes were displayed...

But, corrosion on the fuse tray can cause all kinds of havoc and strange symptons.

After the cleaning job, clear the codes and see if any return...
http://sportsterpedia.com/doku.php/t...k:ref:genmsr08


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So even if the fuses aren’t blown and what not, they could be at fault?
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Quote:
Originally Posted by Viffer View Post
So even if the fuses aren’t blown and what not, they could be at fault?
Corrosion is like dirt between the contacts, only very thin... It can cause intermittent loss of signals. Unless the contact is clean and tight, vibration can cause intermittent loss of signals. Sometimes corrosion can keep a contact from working & vibrations intermittently causes it to work. There are all kinds of strange results from the intermittent operation caused by a thin layer of corrosion on contacts. Especially if the power to the ECM/TSM/Speedo is intermittently broken - computer electronics hate that.

Sometimes, just disconnecting & reconnecting connectors will allow the contacts to wipe thru corrosion to make contact and stuff works again.

Clean contacts are important - that's why the mfrs use sealed connectors - but that is not always perfect, especially on a vibrating machine that is operated in the rain.

Be sure to use dielectric grease (which is non-conductive) - NOT regular grease which might have conductivity due to the ingredients...


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