I've had my 1986 m1009 for a few weeks and it used to start right up in no time.Lately the "wait" light has been on for alot longer before starting, and both battery lights stay on while I'm trying to start it, it takes awhile for the engine to catch and start up. I'm wondering if one or both batteries could be going, or if it might be an alternator issue. When the truck finally does start it idles really loud and rough for awhile and clicks like it's switching power sources. The batt gauge sits in the middle between "generator" and "battery". I need to fix the issue soon because the colder it gets, the harder it'll be to start. Do these trucks need to be plugged in in the winter, or does the 24v starting system do the trick when it's working properly?