I have a 96 marada 21' open bow with a 5.0 v8. trying to get it ready for the season. pulled it out and put a trickle charger on it. tried to start it and I hear a click but won't try and start. I also tried to jump start it with no luck. and conveniently non of the necessities are working either such as the bilge pump, horn, light etc. the radio works and the gauges are showing a decent charge on the battery. any idea where to start?