Hi recently purchased a 90 Itasca Spirit...coach battery is 6 years old.today was tested weak at the battery store.. For some reason it was a 24ms marine battery which is a marine starting battery. So upon talking with battery guy, I bought a 27dc battery. Switched them out and noticed right away that convertor started clicking every 20 s3conds. It clicks and the lights I turned on stay bright and clicks and the lights dim. I'm almost positive I hooked the battery back up the right way, I have a small solar panel and there's 4 wires in the battery compartment, two small black and reds that come into the battery compartment together, I'm assuming from the solar panel, and then a big cable which is positive and another cable that I'm was assuming was ground coming from the back end of battery compartment..... so when I hook the older 24ms battery back up it doesn't click the invertor like the new battery, the lights turn on very dim but the meter where u can check water levels etc,.. doesn't work and also the auxiliary cig lighter in coach doesn't work. That stuff doesn't work on either battery, but lights work on both, also i notice one cable on the ground battery heats up pretty hot as does the convertor seems to warm up pretty quick with that new battery... I appreciate any help so much, as I was so excited I thought I could wire my TV and electronics in today and plan a trip... thanks to anyone who can help...