Have you checked your batteries lately?
How long has it been since your batteries were replaced? If you’re not sure, your luck may be running out. There is nothing worse than finding your MMC shifter’s will not work because your battery is dead, and your generator will not start to charge the batteries up, because that battery is dead. Since these batteries were originally installed at the same time, they seem to all begin failing at the same time too. Batteries are one of the cheapest insurance policies you will ever buy.