I was changing spark plugs on my '99 LS today and neglected (or forgot) to disconnect the battery. As I was taking out one plug, there was a spark. Afterward, the engine starts, but nothing electrical (lights, radio, dashboard, it will not even shift out of Park) works. I must have fried some major fuse or relay. Any suggestions before I blow all the money I saved on the plugs?

 

No simple way but to pull each fuse and inspect. Buy some spares cause even though some may look good, they could be toasted.

 

OK, I found the culprit. In the engine fuse/relay box there are what appears to be 7 fuses that are on the side toward the engine. One is labeled 120A ALT. I tried to pull it out, but it did not come. Do I have to replace the entire bank?

 

Check the link.
http://us.lexusownersclub.com/forums...e-replacement/

 

Got it. Another trip to Autozone and finished at 9:30 pst. Lesson learned....take off the stupid battery cable next time.

 

I accidently dropped a penny into my cigarette lighter once when I accelerated hard. whole car freaked out and lost almost everything electronic in the car. SERIOUSLY freaked me out before I knew what it was. it took 7 fuses with it!!!! lmao

 

fuses are there to prevent further damage to the car! glad it was sorted out to the OP.