Doesn't ur charger have 3 sets of leads? 5amp for each TM battery and a 3 for the cranking battery. Each TM battery shud b on its own lead an the cranking bat on the 3 amp, like the drawing. At least that is how I've always done it.. I've never had a charger that didn't start charging as soon as it was plugged up. Some, like my MK, will go thru a cycle for 24 hrs after they are charged. Like my MK, if it doesn't stop blinking after the 24 hrs, there's a problem. Like low on water, or maybe a bad battery.