When I got into my 2000 4runner this morning, everything seemed fine...interior lights on, etc. I tried to start it, it clicked, and then it died. I took the key out of the ignition and popped the hood and noticed there was a clicking sound coming from what appears to be the fuse box right beside the battery. I tried to jump it, with no success. So, I was going to disconnect the positive battery cable, and as I was doing so, the headlights suddenly came on and the clicking noise stopped. Any idea what may be going on?