Originally Posted by
pizzaguy
Measure the battery voltage - right across it's terminals - if you have battery voltage and no lights/etc., then the 200 amp fuse is blown or you have an open crimp/clamp/etc. somewhere.
If you have no battery voltage, the battery is dead. (This can be due to current draw when the car is sitting or <and I had this happen years ago> you have a broken connection between a battery post and battery plate. This can happen from age or from flexing of the connection between the battery post and plate - caused by weaknesses in the construction of the battery's housing.)
A voltmeter will tell you all you need to know, no mater what is wrong here.
What Pizzaguy said. If those don't find the trouble you could try this... Get your jumper cables out take one of the ends black clips and connect it to the battery NEGATIVE (the -) connection. Go to the other end of the jumper cable and take the black clip and clip that to a beefy metal spot on the engine block. Again that is the negative battery post to the engine block using the two black clips.. THE RED CLIPS CONNECT TO NOTHING. This would bypass the cars ground lead that we suspect could be corroded. If all is good with this bypass in place replace the negative battery lead. WARNING! Do not go anywhere near the red or positive battery lead or connectors to do this test. If you don't fully understand what this test does please don't proceed.