Hi it does not sound like its the batterys to me this is what i would do at this point.
1. take both of my battery terminals off and check them real good.
2. then get me a wire brush and clean them good.
3. then take the bolt out of the positive terminal you should have two leads here clean the bolt good and take you a box knife and trim the rubber off so its metal to metal do this on both positive cables then hook your positive cable back up to your battery then take your negetive cable and do the same making sure you tighten them real good then make sure you have 12 volts in the battery then try to start car note if connettions are really bad i recomend replaceing all cables but i think this is your problem. Thanks
Al
Al Muckenfuss,
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