94 Heritage Softail Classic Turn Signal canceller
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Stage IV
Joined: Jul 2025
Posts: 4
Likes: 2
From: Clearlake CA
94 Heritage Softail Classic Turn Signal canceller
Hey yall. First time here and posting a thread. Hope this finds everyone of yall good and safe.
So a buddybrought over his 94 heritage softail classic for some wiring shorts that he had after he had some (unsure what to call them) Methican American mess with his bike to remove the turn signals. Through my research I've found that leaving the TSCM in can affect other aspects of the bike including headlight brights not working. I am wondering if there is a walk around i need to do to cancel this or just removing the extra wires even from the plugs will be ok. All turn signals lights have been removed and trashed. I will remove all the turn signal wires from the harness plugs at the neck of the bike. Any help will be greatly appreciated.
So a buddybrought over his 94 heritage softail classic for some wiring shorts that he had after he had some (unsure what to call them) Methican American mess with his bike to remove the turn signals. Through my research I've found that leaving the TSCM in can affect other aspects of the bike including headlight brights not working. I am wondering if there is a walk around i need to do to cancel this or just removing the extra wires even from the plugs will be ok. All turn signals lights have been removed and trashed. I will remove all the turn signal wires from the harness plugs at the neck of the bike. Any help will be greatly appreciated.
Thread Starter
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Stage IV
Joined: Jul 2025
Posts: 4
Likes: 2
From: Clearlake CA
Does it have a TSM or the TSSM
Difference between a Turn Signal Module (TSM) and a Turn Signal Security Module (TSSM) on Harley-Davidson motorcycles lies in the security features. The TSM primarily manages turn signals and functions as a bank angle sensor, while the TSSM includes all TSM functionalities plus additional security features like an immobilizer and key fob recognition according to Custom Dynamics
Or does it really have a TSCM
You can remove Module and jump a TSM.
Before removing stuff, unplug and get things right.
Difference between a Turn Signal Module (TSM) and a Turn Signal Security Module (TSSM) on Harley-Davidson motorcycles lies in the security features. The TSM primarily manages turn signals and functions as a bank angle sensor, while the TSSM includes all TSM functionalities plus additional security features like an immobilizer and key fob recognition according to Custom Dynamics
Or does it really have a TSCM
You can remove Module and jump a TSM.
Before removing stuff, unplug and get things right.
Truly has a TSCM. I'm a certifi automotive electrical not motorcycles so according to the wiring diagram thats what it says.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,640
Likes: 6,445
From: Honah Lee
I search the you tube for that part number.
It explains I think your TSCM function.
I think I have a handle on the newer TSM and TSSM.
Trying to update my Folder for this old system you have.
It explains I think your TSCM function.
I think I have a handle on the newer TSM and TSSM.
Trying to update my Folder for this old system you have.
Last edited by Jackie Paper; Jul 22, 2025 at 12:22 PM.
Thread Starter
|
Stage IV
Joined: Jul 2025
Posts: 4
Likes: 2
From: Clearlake CA
I search the you tube for that part number.
It explains I think your TSCM function.
I think I have a handle on the newer TSM and TSSM.
Trying to update my Folder for this old system you have.
https://youtu.be/dLi3hEk15HI?si=EQTT1tWkbqOD8GOi
It explains I think your TSCM function.
I think I have a handle on the newer TSM and TSSM.
Trying to update my Folder for this old system you have.
https://youtu.be/dLi3hEk15HI?si=EQTT1tWkbqOD8GOi
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,640
Likes: 6,445
From: Honah Lee
I don't think the newer Softails like mine have the TSM and the TSSM affect headlights. They have a bank angle kill switch in them, turn signal cancel and monitor resistance to indicate a burnt out bulb.
They are no longer available from Harley.
You can jump out a TSM. Not so with a TSSM.
PS.. welcome to the HDFORUM. Your experience and training will be a valuable assett.
asset.
That module is probably is valuable on ebay...
Last edited by Jackie Paper; Jul 22, 2025 at 01:57 PM.
Seasoned HDF Member
Joined: Sep 2008
Posts: 14,177
Likes: 11,277
From: San Diego, CA
Welcome to the world of Harley... The MoCo frequently has its own language. Harley just happens to call it a "Turn Signal Canceller" or I guess that would be a "TSC" for short...
If you want to get it running back in OEM form, the Harley part is #68537-89G. It is no longer available from the MoCo.
I know V-Twin makes an aftermarket one (about $100), and Custom Dynamics offers one too ($89.95).
As far as just cutting it out, it has been awhile since I have worked on an EVO bike, but I don't believe the turn signal canceller affects anything other than the turn signals. I believe, until the BCM bikes, the headlight circuits were different and separate from the turn signal (and later tip over sensor) circuits handled by the TSC and later TSM/TSSM modules.
There are some knowledgeable EVO guys on here, hopefully one of them will chime in..
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