My 87 doesn't do much in the summer months so it sometimes sits for a couple of weeks. I went out to start her the other day and of course dead battery, the battery that was in was about 3-4 yrs. old so i charged it and everything ok. Except the lights on dash,battery, brake and sensor lights stayed on this has never happened before.I thought maybe because of weak battery. Car sat for a couple of weeks and again dead battery so i figure bad battery, i have put new one in and lights still on ANY THOUGHTS.