I disconnected and cleaned the ground to the starter. Now things have changed; I no longer see a 3 volt drop when I turn the key to position 2. the battery goes from about 12.30 to 11.32 volts. all the diagnostic lights stay bright. The headlights are now staying bright when I try to crank the engine (while previously they would completely dim during a crank) but now there is no clicking at all at the starter. I put a meter on the starter and I am getting 11.32 volts at the starter with the key in position 2. I think my starter is no longer working.