New battery keeps dying slowly. I get 13.7 volt output at alternator but only 12.8 at battery. Thinking that voltage drop due to bad wiring between alternator and battery. Trying to trace wires but don't have diagram. Getting about 2 ohms resistance from alt to battery. Not sure if that is normal. Any help appreciated.
Look for an electrical box in the engine compartment on the driver's side containing a fuse rated more than 100 amps -- maybe 140 amps -- and see if that fuse is blown. You don't have a good connection between the alternator and battery. Two ohms is not normal. It should be zero ohms.
For any further detail, you'll need to say the Toyota model name.