Auto Electronics: Toyota Sequoia Electrical Problem, toyota sequoia, fuse panel

Question
I have a 2003 Sequoia and the battery discharge light was coming on. Tested the battery and it was under 12.8 amps when disconnected so replaced. However, before replacing I tried to swap in a used battery and had the teminals reversed (battery wasn't fit for this car). Upon connecting the wires the alarm went off and teh horn sounded. I quickly disconnected everything and proceeded to get a new replacement. Installed the new battery and fired her up but the instrument cluster and light, wiper switch, radio and turn signals do not work now. I've checked every fuse I could find and they all appear to be good. Could there be a blown relay or is there someplace I've missed (been thru the in dash fuse panel and all three under the hood)before I spend $ at the mechanic? Any other connections that might have gotten fried with the polarity reverse?

Answer
Hello Robert,

Due to the nature of your question and the fact that this is going to be a very lengthy and in depth process, i am not able to assist you and answer your question on allexperts.com

However all is not lost.  I am certain i can assist you with this problem and get your car back to the correct running function it once had, without a trip to your mechanic, or if not im going to try my best to help you avoid having to go to a mechanic.

Please email me at aibarra@12voltsupport.com, and restate your question to me in the email (Copy and paste what you typed to me in here).  I will respond back to you and assist you in the diagnostic process, also you can feel free to re-post this question in my automotive electrical support forum at www.12voltsupport.com, i manage this forum, and am able to get more in depth there and go into much more detail diagnostically then i am able to here.  It is free to join and to post.

I look forward to hearing from you soon.

Thank you.