SOURCE: 2003 Wideglide check engine light (bad TSSM?)
I would not replace anthing yet! An intermittent light could mean that you simply have a wiring short! Get someone to help by watching your engine light, start your bike and do a wriggle test oun your wiring harness. You may find it to be no more than a simple wiring problem at the connector. You said there are no stored codes and the bike is running fine? No missing of sputtering? If not I would think the problen is no more than a possible temporary short in the wiring at the sensors
TSM/TSSM BANK ANGLE FUNCTION
GENERAL
The turn signals, the starter motor, the ignition controller (ECM) and the coil will be disabled in the event the vehicle tilts more than 45 degrees from vertical for longer than one second.
CAUTION
If the vehicle is being operated with a sidecar, the setting MUST be switched from solo vehicle operation to sidecar operation or the TSM/TSSM will not function properly. If a sidecar is installed, reconfigure the TSM/TSSM using the method under Service manual VEHICLE DELIVERY instructions.
OPERATION
The engine will shut off automatically if the vehicle tilts more than 45 degrees from vertical for longer than one second and the engine will automatically shut off even if the tilt occurs at a very slow speed. To restart the motorcycle after shutdown has occurred return the motorcycle to an upright position. And then cycle the ignition key to OFF and then to ON before trying to start the vehicle.
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