Toby I would get one of those cheapy light tester and start at the wiring to the bulb checking the wires hunting for power all the way up to the switches before you start buying stuff.

 

WARG what was your fix for this? Mine is doing same thing, not bulbs or connections, it's somethign far more complicated. I threw another TSM on the bike and it did the same thing. I am 100% stumped on this.

 

Anyone have any intel on this?

 

Really hoping someones got some ideas.

 

has my turn/brake/run module go bad,,

dealer replaced it for free..


.

 

i have the same problem on 96 FXSTSB badboy.

i got a new module $120 bucks the one in between the tanks. and still have the same problem!!!!!!!! f*&^% been at this for a few days now. i traced all the wires and not a dang thing. Right side works good. no broken wires i even swapped the leads just to make shure the left side work and it did just not getting the not getting signal back out of that box to the lights WTF!!!!!!!!!!! HELP!

 

Mine ended up being a loose wire in the front left turn signal. I spent hours searching and found nothing. The dealer found it in an hour and allowed me to return the new TSM I bought from them. I have since replaced my front signals with a light bar and have had no more issues.

 

Unplug it and plug the factory connections back in... I have had 2 go bad...
Y'all doing all this work....
Take it out of the loop... Then you will know...
I'm talking about the run/stop/turn module
That's added in to make the rear signals come on for other than just left or right turning.
Those things cost. 49.99 or so...,
Put it on yourself! Tajes 3 1/2 seconds, no tools...
Well maybe a quarter to undo your seat bolt...

 

check the filaments in both light bulbs does the rear light up and not flash or not light up at all mine just starred and its my module

 

How do you know it's not bulbs or connections....? The OP thought all his connections were good, too. It's always best to do a systematic check of the system, with a voltmeter, before throwing parts at it. As you have found out, throwing parts at a problem can get expensive.

If you don't want to go to a dealer or independent, this might be a good time to get the electronic diagnostic manual for your bike model/year... Whenever I get a bike, I always buy the HD Service Manual, Parts Manual (the exploded diagrams help me a lot), and the Electronic Diagnostic Manual for that bike. Admittedly, I use the electronic diagnostic manual the least, but it's worth it's weight in gold when I need it! If you have, or you can check online, the Owner's Manual for your bike, almost all the way to the back, it will list the part numbers for the manuals that correspond to your bike. You can usually find then new/used on eBay, but I've had good luck with even some of the older manuals, buying them from the online HD parts sellers.... a few times I've gotten older, new manuals cheaper from online HD parts vendors, than the used ones listed on eBay.

Good luck with your trouble shooting/ repair....