I would tend to agree that it is a bad battery, one that is not quite shot, but getting there. If you have a volt meter, set it for DC, and with the car off, see if you have 12 volts. If not, it should drop by sets of 2, 2 volts less for every bad cell. If you do have 12 volts, turn on the car, and watch your meter. Once the car starts, you should start showing about 14 volts if it is charging. If you have 12 off and 14 on, then it is something else...like a loose wire, an intermittent short, or something along those lines.
Honor
......use to drive a horizon/omni, have moved up to mini-vans