Toyota: Toyota truck dash lights, toyota 4x4 pickup, powerwashing

Question
I have a 92' Toyota 4x4 pickup that has recently developed a problem where the brake, battery, and A/T lights will come on simultaneously, and intermittently.  Higher rpms seem to trigger the lights, and they will sometimes switch off during idle or reduced rpms.
I'm not sure, but the problem seems to have been triggered by my powerwashing of the engine.

Please help

Answer
Lights?  Meaning the warning lights?  Wow...  Does the car drive ANY differently?  Well, by powerwashing, I'm gonna assume you used a pressure washer and probably sat a little to long on a single spot and probably force water into a couple of areas that simply don't have a good enough gasket to keep pressured water out.  

How long has it been since you did the power washing?

Did you cover up anything in the engine bay before doing this?  Typically, the routine goes: Cover Alternator, DIS box or distributor, and/or coil packs.  After you wash the engine down, you start it up and little it dry itself.  You don't let the wand sit in any one area too long and don't purposely try to water ignition components or anything electrical if you cannot cover them.  

Answer back and we'll go from there:)  Hope this helps Chris!
-David D.