I have just been browsing around TM/M3W and have spotted someone complaining about dodgy indicator timeouts. One of the suggestions made was that the battery could be either flat or past its best. His battery was 6 years old. As the battery weakens, its internal resistance increases, and so the back EMF of the starter motor will have more effect on the 12V rail. It wouldn't surprise me if an old battery can give 42V or more on a poor battery thus killing the 24V-rated chip in the TSM.
I hope to be able to apply 42V to any pin of the new TSM, but a thought has just occurred to me that the new TSM could measure the battery voltage and report the over-voltage by flashing the dashboard's Hazard indicator. Perhaps 12 very brief flashes then one half-second flash for every volt above 12? Then you could know the state of the battery.
